./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:52:11,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:52:11,757 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:52:11,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:52:11,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:52:11,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:52:11,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:52:11,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:52:11,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:52:11,780 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:52:11,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:52:11,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:52:11,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:52:11,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:52:11,784 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:52:11,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:52:11,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:52:11,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:52:11,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:52:11,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:52:11,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:52:11,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:52:11,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:52:11,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:52:11,786 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:52:11,786 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:52:11,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:52:11,786 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:52:11,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:52:11,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:52:11,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:52:11,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:52:11,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:52:11,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:52:11,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:52:11,789 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:52:11,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:52:11,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:52:11,790 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:52:12,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:52:12,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:52:12,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:52:12,022 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:52:12,023 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:52:12,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:52:12,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:52:12,153 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:52:12,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:52:13,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:52:13,293 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:52:13,293 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:52:13,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ae9eca6/7f93b0f03a504e2f9515336809f11bbb/FLAGf0e723910 [2024-06-27 17:52:13,321 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ae9eca6/7f93b0f03a504e2f9515336809f11bbb [2024-06-27 17:52:13,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:52:13,323 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:52:13,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:52:13,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:52:13,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:52:13,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:12" (1/2) ... [2024-06-27 17:52:13,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d985ab0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:13, skipping insertion in model container [2024-06-27 17:52:13,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:12" (1/2) ... [2024-06-27 17:52:13,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6642f08b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:52:13, skipping insertion in model container [2024-06-27 17:52:13,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:52:13" (2/2) ... [2024-06-27 17:52:13,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d985ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13, skipping insertion in model container [2024-06-27 17:52:13,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:52:13" (2/2) ... [2024-06-27 17:52:13,333 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:52:13,370 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:52:13,371 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:52:13,371 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:52:13,371 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:52:13,371 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:52:13,372 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:52:13,372 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-27 17:52:13,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:52:13,572 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:52:13,713 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:52:13,720 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:52:13,750 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:52:13,823 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:52:13,857 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:52:13,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13 WrapperNode [2024-06-27 17:52:13,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:52:13,860 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:52:13,860 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:52:13,860 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:52:13,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,915 INFO L138 Inliner]: procedures = 176, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-06-27 17:52:13,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:52:13,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:52:13,918 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:52:13,918 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:52:13,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,927 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,938 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:52:13,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:52:13,954 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:52:13,954 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:52:13,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:52:13,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (1/1) ... [2024-06-27 17:52:13,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:52:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:52:13,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:52:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:52:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:52:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:52:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:52:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:52:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:52:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:52:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:52:14,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:52:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 17:52:14,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 17:52:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:52:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:52:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:52:14,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:52:14,001 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:52:14,090 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:52:14,092 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:52:14,284 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:52:14,284 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:52:14,361 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:52:14,361 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:52:14,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:52:14 BoogieIcfgContainer [2024-06-27 17:52:14,362 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:52:14,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:52:14,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:52:14,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:52:14,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:52:12" (1/4) ... [2024-06-27 17:52:14,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5a413e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:52:14, skipping insertion in model container [2024-06-27 17:52:14,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:52:13" (2/4) ... [2024-06-27 17:52:14,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5a413e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:52:14, skipping insertion in model container [2024-06-27 17:52:14,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:52:13" (3/4) ... [2024-06-27 17:52:14,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5a413e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:52:14, skipping insertion in model container [2024-06-27 17:52:14,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:52:14" (4/4) ... [2024-06-27 17:52:14,368 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:52:14,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:52:14,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:52:14,380 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:52:14,423 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:52:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:52:14,469 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2024-06-27 17:52:14,469 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:52:14,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-06-27 17:52:14,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:52:14,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 47 transitions, 106 flow [2024-06-27 17:52:14,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:52:14,484 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;@49f7a5cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:52:14,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:52:14,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:52:14,488 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:52:14,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:52:14,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:14,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:52:14,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:14,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash 211815638, now seen corresponding path program 1 times [2024-06-27 17:52:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203570440] [2024-06-27 17:52:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:14,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:14,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:14,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203570440] [2024-06-27 17:52:14,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203570440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:14,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:14,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:52:14,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472205690] [2024-06-27 17:52:14,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:14,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:52:14,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:52:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:52:14,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:52:14,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:14,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:14,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:52:14,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:15,438 INFO L124 PetriNetUnfolderBase]: 4259/6651 cut-off events. [2024-06-27 17:52:15,439 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-27 17:52:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12699 conditions, 6651 events. 4259/6651 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41659 event pairs, 3264 based on Foata normal form. 1/6466 useless extension candidates. Maximal degree in co-relation 12686. Up to 5859 conditions per place. [2024-06-27 17:52:15,483 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 41 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-06-27 17:52:15,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 239 flow [2024-06-27 17:52:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:52:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:52:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-06-27 17:52:15,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7160493827160493 [2024-06-27 17:52:15,496 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 106 flow. Second operand 3 states and 116 transitions. [2024-06-27 17:52:15,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 239 flow [2024-06-27 17:52:15,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:15,504 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 141 flow [2024-06-27 17:52:15,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-27 17:52:15,509 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-06-27 17:52:15,509 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 141 flow [2024-06-27 17:52:15,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:15,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:15,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:52:15,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:15,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash 911027937, now seen corresponding path program 1 times [2024-06-27 17:52:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375658622] [2024-06-27 17:52:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:15,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375658622] [2024-06-27 17:52:15,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375658622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:15,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:15,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332680566] [2024-06-27 17:52:15,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:15,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:15,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:16,436 INFO L124 PetriNetUnfolderBase]: 6873/10533 cut-off events. [2024-06-27 17:52:16,438 INFO L125 PetriNetUnfolderBase]: For 1719/1727 co-relation queries the response was YES. [2024-06-27 17:52:16,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22835 conditions, 10533 events. 6873/10533 cut-off events. For 1719/1727 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 66684 event pairs, 3630 based on Foata normal form. 11/10458 useless extension candidates. Maximal degree in co-relation 22823. Up to 9207 conditions per place. [2024-06-27 17:52:16,503 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 64 selfloop transitions, 13 changer transitions 0/92 dead transitions. [2024-06-27 17:52:16,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 412 flow [2024-06-27 17:52:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-06-27 17:52:16,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7175925925925926 [2024-06-27 17:52:16,509 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 141 flow. Second operand 4 states and 155 transitions. [2024-06-27 17:52:16,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 412 flow [2024-06-27 17:52:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:16,517 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 238 flow [2024-06-27 17:52:16,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-27 17:52:16,519 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-06-27 17:52:16,521 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 238 flow [2024-06-27 17:52:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:16,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:52:16,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:16,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -675423840, now seen corresponding path program 1 times [2024-06-27 17:52:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:16,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217250983] [2024-06-27 17:52:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:16,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217250983] [2024-06-27 17:52:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217250983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:16,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:16,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:16,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171028219] [2024-06-27 17:52:16,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:16,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:16,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:16,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:16,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:16,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:17,421 INFO L124 PetriNetUnfolderBase]: 7067/10341 cut-off events. [2024-06-27 17:52:17,421 INFO L125 PetriNetUnfolderBase]: For 6069/6092 co-relation queries the response was YES. [2024-06-27 17:52:17,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26969 conditions, 10341 events. 7067/10341 cut-off events. For 6069/6092 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 62318 event pairs, 2139 based on Foata normal form. 46/10362 useless extension candidates. Maximal degree in co-relation 26954. Up to 9219 conditions per place. [2024-06-27 17:52:17,471 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 76 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-06-27 17:52:17,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 550 flow [2024-06-27 17:52:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-06-27 17:52:17,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:52:17,473 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 238 flow. Second operand 5 states and 190 transitions. [2024-06-27 17:52:17,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 550 flow [2024-06-27 17:52:17,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 107 transitions, 546 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:17,478 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 293 flow [2024-06-27 17:52:17,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 17:52:17,479 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-06-27 17:52:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 293 flow [2024-06-27 17:52:17,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:17,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:17,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:17,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:52:17,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash -831768271, now seen corresponding path program 1 times [2024-06-27 17:52:17,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:17,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100538266] [2024-06-27 17:52:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:17,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100538266] [2024-06-27 17:52:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100538266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:17,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:52:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905163112] [2024-06-27 17:52:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:52:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:52:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:52:17,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:17,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:17,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:17,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:18,195 INFO L124 PetriNetUnfolderBase]: 5554/8127 cut-off events. [2024-06-27 17:52:18,195 INFO L125 PetriNetUnfolderBase]: For 8436/8436 co-relation queries the response was YES. [2024-06-27 17:52:18,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23506 conditions, 8127 events. 5554/8127 cut-off events. For 8436/8436 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 48434 event pairs, 2784 based on Foata normal form. 6/8108 useless extension candidates. Maximal degree in co-relation 23488. Up to 7526 conditions per place. [2024-06-27 17:52:18,247 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 58 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-27 17:52:18,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 500 flow [2024-06-27 17:52:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-27 17:52:18,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-27 17:52:18,249 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 293 flow. Second operand 4 states and 149 transitions. [2024-06-27 17:52:18,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 500 flow [2024-06-27 17:52:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 465 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:18,254 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 322 flow [2024-06-27 17:52:18,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-27 17:52:18,256 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2024-06-27 17:52:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 322 flow [2024-06-27 17:52:18,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:18,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:52:18,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:18,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -923834898, now seen corresponding path program 1 times [2024-06-27 17:52:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048488997] [2024-06-27 17:52:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048488997] [2024-06-27 17:52:18,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048488997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:18,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:18,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:18,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938629329] [2024-06-27 17:52:18,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:18,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:18,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:18,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:18,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:18,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:18,978 INFO L124 PetriNetUnfolderBase]: 5719/8408 cut-off events. [2024-06-27 17:52:18,978 INFO L125 PetriNetUnfolderBase]: For 10053/10053 co-relation queries the response was YES. [2024-06-27 17:52:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24629 conditions, 8408 events. 5719/8408 cut-off events. For 10053/10053 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 50216 event pairs, 2514 based on Foata normal form. 30/8414 useless extension candidates. Maximal degree in co-relation 24609. Up to 7535 conditions per place. [2024-06-27 17:52:19,028 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 71 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-27 17:52:19,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 604 flow [2024-06-27 17:52:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-06-27 17:52:19,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:52:19,030 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 322 flow. Second operand 5 states and 186 transitions. [2024-06-27 17:52:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 604 flow [2024-06-27 17:52:19,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 589 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:19,034 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 378 flow [2024-06-27 17:52:19,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-06-27 17:52:19,035 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 13 predicate places. [2024-06-27 17:52:19,035 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 378 flow [2024-06-27 17:52:19,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:19,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:19,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:52:19,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:19,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 5193737, now seen corresponding path program 1 times [2024-06-27 17:52:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:19,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844175355] [2024-06-27 17:52:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:19,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:19,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:19,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844175355] [2024-06-27 17:52:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844175355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:19,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267817072] [2024-06-27 17:52:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:19,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:19,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:19,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:19,762 INFO L124 PetriNetUnfolderBase]: 7165/10523 cut-off events. [2024-06-27 17:52:19,762 INFO L125 PetriNetUnfolderBase]: For 16739/16742 co-relation queries the response was YES. [2024-06-27 17:52:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32220 conditions, 10523 events. 7165/10523 cut-off events. For 16739/16742 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 63659 event pairs, 3467 based on Foata normal form. 5/10497 useless extension candidates. Maximal degree in co-relation 32198. Up to 9718 conditions per place. [2024-06-27 17:52:19,831 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 77 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-27 17:52:19,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 712 flow [2024-06-27 17:52:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-06-27 17:52:19,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:52:19,833 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 378 flow. Second operand 4 states and 144 transitions. [2024-06-27 17:52:19,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 712 flow [2024-06-27 17:52:19,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 667 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:19,849 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 466 flow [2024-06-27 17:52:19,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-27 17:52:19,849 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2024-06-27 17:52:19,850 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 466 flow [2024-06-27 17:52:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:19,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:19,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:52:19,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:19,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1406773653, now seen corresponding path program 1 times [2024-06-27 17:52:19,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:19,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594550032] [2024-06-27 17:52:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:19,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:19,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594550032] [2024-06-27 17:52:19,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594550032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:19,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:19,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176601880] [2024-06-27 17:52:19,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:19,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:19,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:19,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:19,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:19,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:20,596 INFO L124 PetriNetUnfolderBase]: 7230/11014 cut-off events. [2024-06-27 17:52:20,596 INFO L125 PetriNetUnfolderBase]: For 25217/25221 co-relation queries the response was YES. [2024-06-27 17:52:20,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35977 conditions, 11014 events. 7230/11014 cut-off events. For 25217/25221 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69729 event pairs, 2465 based on Foata normal form. 19/10924 useless extension candidates. Maximal degree in co-relation 35953. Up to 8887 conditions per place. [2024-06-27 17:52:20,659 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 91 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-27 17:52:20,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 855 flow [2024-06-27 17:52:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 17:52:20,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:52:20,660 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 466 flow. Second operand 5 states and 184 transitions. [2024-06-27 17:52:20,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 855 flow [2024-06-27 17:52:20,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 126 transitions, 841 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:20,680 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 545 flow [2024-06-27 17:52:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-27 17:52:20,680 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-06-27 17:52:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 545 flow [2024-06-27 17:52:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:20,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:20,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:52:20,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:20,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1897096827, now seen corresponding path program 1 times [2024-06-27 17:52:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901774201] [2024-06-27 17:52:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901774201] [2024-06-27 17:52:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901774201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597249106] [2024-06-27 17:52:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:20,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:20,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 545 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:20,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:20,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:20,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:21,525 INFO L124 PetriNetUnfolderBase]: 7191/10983 cut-off events. [2024-06-27 17:52:21,525 INFO L125 PetriNetUnfolderBase]: For 31424/31428 co-relation queries the response was YES. [2024-06-27 17:52:21,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37415 conditions, 10983 events. 7191/10983 cut-off events. For 31424/31428 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 69368 event pairs, 2028 based on Foata normal form. 19/10893 useless extension candidates. Maximal degree in co-relation 37388. Up to 8869 conditions per place. [2024-06-27 17:52:21,591 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 88 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-27 17:52:21,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 123 transitions, 846 flow [2024-06-27 17:52:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-27 17:52:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:52:21,593 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 545 flow. Second operand 5 states and 181 transitions. [2024-06-27 17:52:21,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 123 transitions, 846 flow [2024-06-27 17:52:21,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 123 transitions, 819 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:21,629 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 551 flow [2024-06-27 17:52:21,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=551, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2024-06-27 17:52:21,629 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 23 predicate places. [2024-06-27 17:52:21,630 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 551 flow [2024-06-27 17:52:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:21,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:21,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:52:21,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:21,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -58042263, now seen corresponding path program 1 times [2024-06-27 17:52:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999988372] [2024-06-27 17:52:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999988372] [2024-06-27 17:52:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999988372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:21,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154741248] [2024-06-27 17:52:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:21,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:21,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:21,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:21,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:21,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:22,435 INFO L124 PetriNetUnfolderBase]: 6925/10520 cut-off events. [2024-06-27 17:52:22,436 INFO L125 PetriNetUnfolderBase]: For 34885/34902 co-relation queries the response was YES. [2024-06-27 17:52:22,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37148 conditions, 10520 events. 6925/10520 cut-off events. For 34885/34902 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 67486 event pairs, 3257 based on Foata normal form. 10/10449 useless extension candidates. Maximal degree in co-relation 37119. Up to 9162 conditions per place. [2024-06-27 17:52:22,488 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 81 selfloop transitions, 33 changer transitions 0/132 dead transitions. [2024-06-27 17:52:22,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 1027 flow [2024-06-27 17:52:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-06-27 17:52:22,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:52:22,489 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 551 flow. Second operand 5 states and 185 transitions. [2024-06-27 17:52:22,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 1027 flow [2024-06-27 17:52:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 132 transitions, 971 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:22,525 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 714 flow [2024-06-27 17:52:22,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-27 17:52:22,526 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-06-27 17:52:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 714 flow [2024-06-27 17:52:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:22,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:22,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:22,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:52:22,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 877454517, now seen corresponding path program 2 times [2024-06-27 17:52:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:22,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774243591] [2024-06-27 17:52:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:22,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:22,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774243591] [2024-06-27 17:52:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774243591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:22,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:52:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281328191] [2024-06-27 17:52:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:52:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:52:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:52:22,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:22,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 714 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:22,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:22,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:22,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:23,254 INFO L124 PetriNetUnfolderBase]: 7013/10451 cut-off events. [2024-06-27 17:52:23,254 INFO L125 PetriNetUnfolderBase]: For 43390/43400 co-relation queries the response was YES. [2024-06-27 17:52:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40716 conditions, 10451 events. 7013/10451 cut-off events. For 43390/43400 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 65155 event pairs, 2661 based on Foata normal form. 12/10450 useless extension candidates. Maximal degree in co-relation 40685. Up to 9332 conditions per place. [2024-06-27 17:52:23,318 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 96 selfloop transitions, 31 changer transitions 0/145 dead transitions. [2024-06-27 17:52:23,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1179 flow [2024-06-27 17:52:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-06-27 17:52:23,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2024-06-27 17:52:23,319 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 714 flow. Second operand 5 states and 188 transitions. [2024-06-27 17:52:23,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1179 flow [2024-06-27 17:52:23,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 145 transitions, 1147 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:23,372 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 885 flow [2024-06-27 17:52:23,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=885, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-27 17:52:23,373 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-06-27 17:52:23,373 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 885 flow [2024-06-27 17:52:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:23,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:23,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:23,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:52:23,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:23,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 370845011, now seen corresponding path program 1 times [2024-06-27 17:52:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810005252] [2024-06-27 17:52:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:23,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:23,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:23,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810005252] [2024-06-27 17:52:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810005252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:23,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919824778] [2024-06-27 17:52:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:23,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:23,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 885 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:23,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:23,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:24,192 INFO L124 PetriNetUnfolderBase]: 7388/11047 cut-off events. [2024-06-27 17:52:24,193 INFO L125 PetriNetUnfolderBase]: For 49831/49857 co-relation queries the response was YES. [2024-06-27 17:52:24,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43023 conditions, 11047 events. 7388/11047 cut-off events. For 49831/49857 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 69307 event pairs, 3333 based on Foata normal form. 24/10978 useless extension candidates. Maximal degree in co-relation 42988. Up to 9729 conditions per place. [2024-06-27 17:52:24,242 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 91 selfloop transitions, 44 changer transitions 0/150 dead transitions. [2024-06-27 17:52:24,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 150 transitions, 1374 flow [2024-06-27 17:52:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-06-27 17:52:24,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:52:24,244 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 885 flow. Second operand 5 states and 185 transitions. [2024-06-27 17:52:24,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 150 transitions, 1374 flow [2024-06-27 17:52:24,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 150 transitions, 1304 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:24,298 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 969 flow [2024-06-27 17:52:24,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2024-06-27 17:52:24,299 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-06-27 17:52:24,299 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 969 flow [2024-06-27 17:52:24,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:24,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:24,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:24,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:52:24,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:24,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1263884239, now seen corresponding path program 2 times [2024-06-27 17:52:24,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:24,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684557606] [2024-06-27 17:52:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:24,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684557606] [2024-06-27 17:52:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684557606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:24,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:24,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686436728] [2024-06-27 17:52:24,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:24,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:24,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:24,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 969 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:24,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:24,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:24,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:25,060 INFO L124 PetriNetUnfolderBase]: 7369/10922 cut-off events. [2024-06-27 17:52:25,060 INFO L125 PetriNetUnfolderBase]: For 49042/49060 co-relation queries the response was YES. [2024-06-27 17:52:25,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42788 conditions, 10922 events. 7369/10922 cut-off events. For 49042/49060 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 67360 event pairs, 2912 based on Foata normal form. 18/10888 useless extension candidates. Maximal degree in co-relation 42753. Up to 9812 conditions per place. [2024-06-27 17:52:25,134 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 103 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-27 17:52:25,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1328 flow [2024-06-27 17:52:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 17:52:25,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-27 17:52:25,136 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 969 flow. Second operand 5 states and 184 transitions. [2024-06-27 17:52:25,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1328 flow [2024-06-27 17:52:25,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 149 transitions, 1181 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:25,238 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 902 flow [2024-06-27 17:52:25,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-27 17:52:25,239 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 35 predicate places. [2024-06-27 17:52:25,239 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 902 flow [2024-06-27 17:52:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:25,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:25,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:52:25,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:25,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1263883898, now seen corresponding path program 1 times [2024-06-27 17:52:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:25,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685672240] [2024-06-27 17:52:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:25,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:25,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685672240] [2024-06-27 17:52:25,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685672240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:25,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:25,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:25,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810752618] [2024-06-27 17:52:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:25,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:25,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:25,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 902 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:25,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:25,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:25,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:26,115 INFO L124 PetriNetUnfolderBase]: 7468/11146 cut-off events. [2024-06-27 17:52:26,116 INFO L125 PetriNetUnfolderBase]: For 52893/52911 co-relation queries the response was YES. [2024-06-27 17:52:26,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43717 conditions, 11146 events. 7468/11146 cut-off events. For 52893/52911 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69233 event pairs, 3291 based on Foata normal form. 17/11097 useless extension candidates. Maximal degree in co-relation 43682. Up to 10021 conditions per place. [2024-06-27 17:52:26,166 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 102 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-27 17:52:26,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1337 flow [2024-06-27 17:52:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2024-06-27 17:52:26,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 17:52:26,168 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 902 flow. Second operand 5 states and 173 transitions. [2024-06-27 17:52:26,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1337 flow [2024-06-27 17:52:26,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1275 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:26,233 INFO L231 Difference]: Finished difference. Result has 97 places, 125 transitions, 1033 flow [2024-06-27 17:52:26,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1033, PETRI_PLACES=97, PETRI_TRANSITIONS=125} [2024-06-27 17:52:26,234 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 37 predicate places. [2024-06-27 17:52:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 125 transitions, 1033 flow [2024-06-27 17:52:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:26,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:26,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:52:26,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1413614342, now seen corresponding path program 2 times [2024-06-27 17:52:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845753976] [2024-06-27 17:52:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:26,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845753976] [2024-06-27 17:52:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845753976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:26,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:26,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965400836] [2024-06-27 17:52:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:26,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:26,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 125 transitions, 1033 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:26,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:27,031 INFO L124 PetriNetUnfolderBase]: 7498/11183 cut-off events. [2024-06-27 17:52:27,032 INFO L125 PetriNetUnfolderBase]: For 64956/64977 co-relation queries the response was YES. [2024-06-27 17:52:27,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47164 conditions, 11183 events. 7498/11183 cut-off events. For 64956/64977 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69537 event pairs, 3331 based on Foata normal form. 19/11123 useless extension candidates. Maximal degree in co-relation 47127. Up to 9993 conditions per place. [2024-06-27 17:52:27,103 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 109 selfloop transitions, 42 changer transitions 0/166 dead transitions. [2024-06-27 17:52:27,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 166 transitions, 1591 flow [2024-06-27 17:52:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:52:27,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:52:27,105 INFO L175 Difference]: Start difference. First operand has 97 places, 125 transitions, 1033 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:52:27,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 166 transitions, 1591 flow [2024-06-27 17:52:27,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1548 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:27,192 INFO L231 Difference]: Finished difference. Result has 102 places, 139 transitions, 1258 flow [2024-06-27 17:52:27,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1258, PETRI_PLACES=102, PETRI_TRANSITIONS=139} [2024-06-27 17:52:27,193 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 42 predicate places. [2024-06-27 17:52:27,193 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 139 transitions, 1258 flow [2024-06-27 17:52:27,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:27,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:27,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:27,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:52:27,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:27,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1203680458, now seen corresponding path program 1 times [2024-06-27 17:52:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:27,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852161204] [2024-06-27 17:52:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:27,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:27,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852161204] [2024-06-27 17:52:27,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852161204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:27,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65700207] [2024-06-27 17:52:27,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:27,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:27,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 139 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:27,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:27,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:27,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:28,174 INFO L124 PetriNetUnfolderBase]: 7578/11251 cut-off events. [2024-06-27 17:52:28,174 INFO L125 PetriNetUnfolderBase]: For 79416/79416 co-relation queries the response was YES. [2024-06-27 17:52:28,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51113 conditions, 11251 events. 7578/11251 cut-off events. For 79416/79416 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 69434 event pairs, 3291 based on Foata normal form. 3/11214 useless extension candidates. Maximal degree in co-relation 51073. Up to 10097 conditions per place. [2024-06-27 17:52:28,245 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 159 selfloop transitions, 32 changer transitions 0/206 dead transitions. [2024-06-27 17:52:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 206 transitions, 2100 flow [2024-06-27 17:52:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-06-27 17:52:28,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-27 17:52:28,247 INFO L175 Difference]: Start difference. First operand has 102 places, 139 transitions, 1258 flow. Second operand 6 states and 214 transitions. [2024-06-27 17:52:28,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 206 transitions, 2100 flow [2024-06-27 17:52:28,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 206 transitions, 2020 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-27 17:52:28,331 INFO L231 Difference]: Finished difference. Result has 110 places, 159 transitions, 1465 flow [2024-06-27 17:52:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=110, PETRI_TRANSITIONS=159} [2024-06-27 17:52:28,331 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-06-27 17:52:28,331 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 159 transitions, 1465 flow [2024-06-27 17:52:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:28,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:28,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:28,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:52:28,332 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:28,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1413620294, now seen corresponding path program 2 times [2024-06-27 17:52:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081778326] [2024-06-27 17:52:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081778326] [2024-06-27 17:52:28,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081778326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:28,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:28,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:28,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489348504] [2024-06-27 17:52:28,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:28,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:28,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:28,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 159 transitions, 1465 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:28,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:28,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:28,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:29,423 INFO L124 PetriNetUnfolderBase]: 7639/11302 cut-off events. [2024-06-27 17:52:29,423 INFO L125 PetriNetUnfolderBase]: For 86159/86168 co-relation queries the response was YES. [2024-06-27 17:52:29,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52703 conditions, 11302 events. 7639/11302 cut-off events. For 86159/86168 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 69376 event pairs, 3247 based on Foata normal form. 9/11288 useless extension candidates. Maximal degree in co-relation 52658. Up to 10213 conditions per place. [2024-06-27 17:52:29,510 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 170 selfloop transitions, 35 changer transitions 0/220 dead transitions. [2024-06-27 17:52:29,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 220 transitions, 2282 flow [2024-06-27 17:52:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 244 transitions. [2024-06-27 17:52:29,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-06-27 17:52:29,512 INFO L175 Difference]: Start difference. First operand has 110 places, 159 transitions, 1465 flow. Second operand 7 states and 244 transitions. [2024-06-27 17:52:29,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 220 transitions, 2282 flow [2024-06-27 17:52:29,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 220 transitions, 2194 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:29,668 INFO L231 Difference]: Finished difference. Result has 117 places, 171 transitions, 1606 flow [2024-06-27 17:52:29,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1606, PETRI_PLACES=117, PETRI_TRANSITIONS=171} [2024-06-27 17:52:29,669 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 57 predicate places. [2024-06-27 17:52:29,669 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 171 transitions, 1606 flow [2024-06-27 17:52:29,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:29,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:29,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:29,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:52:29,670 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:29,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1413412904, now seen corresponding path program 3 times [2024-06-27 17:52:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016193478] [2024-06-27 17:52:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:29,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016193478] [2024-06-27 17:52:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016193478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:29,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:29,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158730374] [2024-06-27 17:52:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:29,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:29,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 171 transitions, 1606 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:29,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:29,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:29,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:30,758 INFO L124 PetriNetUnfolderBase]: 7631/11275 cut-off events. [2024-06-27 17:52:30,759 INFO L125 PetriNetUnfolderBase]: For 97211/97211 co-relation queries the response was YES. [2024-06-27 17:52:30,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53990 conditions, 11275 events. 7631/11275 cut-off events. For 97211/97211 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 69223 event pairs, 2897 based on Foata normal form. 3/11260 useless extension candidates. Maximal degree in co-relation 53942. Up to 10207 conditions per place. [2024-06-27 17:52:30,844 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 160 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-27 17:52:30,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 206 transitions, 2183 flow [2024-06-27 17:52:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-27 17:52:30,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:52:30,846 INFO L175 Difference]: Start difference. First operand has 117 places, 171 transitions, 1606 flow. Second operand 5 states and 180 transitions. [2024-06-27 17:52:30,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 206 transitions, 2183 flow [2024-06-27 17:52:31,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 206 transitions, 2093 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:31,014 INFO L231 Difference]: Finished difference. Result has 119 places, 171 transitions, 1589 flow [2024-06-27 17:52:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1589, PETRI_PLACES=119, PETRI_TRANSITIONS=171} [2024-06-27 17:52:31,015 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2024-06-27 17:52:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 171 transitions, 1589 flow [2024-06-27 17:52:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:31,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:31,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:52:31,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1413628230, now seen corresponding path program 1 times [2024-06-27 17:52:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592858882] [2024-06-27 17:52:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:31,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592858882] [2024-06-27 17:52:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592858882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:31,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:31,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828278149] [2024-06-27 17:52:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:31,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:31,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 171 transitions, 1589 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:31,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:31,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:32,153 INFO L124 PetriNetUnfolderBase]: 7733/11456 cut-off events. [2024-06-27 17:52:32,153 INFO L125 PetriNetUnfolderBase]: For 105065/105071 co-relation queries the response was YES. [2024-06-27 17:52:32,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55194 conditions, 11456 events. 7733/11456 cut-off events. For 105065/105071 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 70694 event pairs, 3299 based on Foata normal form. 16/11435 useless extension candidates. Maximal degree in co-relation 55144. Up to 10352 conditions per place. [2024-06-27 17:52:32,246 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 174 selfloop transitions, 18 changer transitions 0/207 dead transitions. [2024-06-27 17:52:32,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 207 transitions, 2173 flow [2024-06-27 17:52:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:52:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:52:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-06-27 17:52:32,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:52:32,248 INFO L175 Difference]: Start difference. First operand has 119 places, 171 transitions, 1589 flow. Second operand 5 states and 176 transitions. [2024-06-27 17:52:32,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 207 transitions, 2173 flow [2024-06-27 17:52:32,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 207 transitions, 2111 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:32,427 INFO L231 Difference]: Finished difference. Result has 120 places, 174 transitions, 1622 flow [2024-06-27 17:52:32,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=120, PETRI_TRANSITIONS=174} [2024-06-27 17:52:32,428 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-06-27 17:52:32,428 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 174 transitions, 1622 flow [2024-06-27 17:52:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:32,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:32,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:32,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:52:32,429 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:32,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash -175426886, now seen corresponding path program 1 times [2024-06-27 17:52:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:32,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899417082] [2024-06-27 17:52:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899417082] [2024-06-27 17:52:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899417082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:32,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:52:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952951343] [2024-06-27 17:52:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:52:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:52:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:52:32,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:32,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 174 transitions, 1622 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:32,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:32,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:32,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:33,313 INFO L124 PetriNetUnfolderBase]: 7318/10850 cut-off events. [2024-06-27 17:52:33,313 INFO L125 PetriNetUnfolderBase]: For 124185/124247 co-relation queries the response was YES. [2024-06-27 17:52:33,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54777 conditions, 10850 events. 7318/10850 cut-off events. For 124185/124247 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 67602 event pairs, 3122 based on Foata normal form. 30/10666 useless extension candidates. Maximal degree in co-relation 54726. Up to 9716 conditions per place. [2024-06-27 17:52:33,390 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 150 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2024-06-27 17:52:33,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 191 transitions, 2014 flow [2024-06-27 17:52:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:52:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:52:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-06-27 17:52:33,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:52:33,391 INFO L175 Difference]: Start difference. First operand has 120 places, 174 transitions, 1622 flow. Second operand 4 states and 140 transitions. [2024-06-27 17:52:33,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 191 transitions, 2014 flow [2024-06-27 17:52:33,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 191 transitions, 1951 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:33,547 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 1641 flow [2024-06-27 17:52:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1641, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-27 17:52:33,548 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-06-27 17:52:33,548 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 1641 flow [2024-06-27 17:52:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:33,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:33,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:52:33,548 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash 265676888, now seen corresponding path program 1 times [2024-06-27 17:52:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:33,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729015485] [2024-06-27 17:52:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729015485] [2024-06-27 17:52:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729015485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:33,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194617872] [2024-06-27 17:52:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:33,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:33,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 1641 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:33,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:33,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:33,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:34,634 INFO L124 PetriNetUnfolderBase]: 8206/12105 cut-off events. [2024-06-27 17:52:34,634 INFO L125 PetriNetUnfolderBase]: For 128584/128605 co-relation queries the response was YES. [2024-06-27 17:52:34,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60459 conditions, 12105 events. 8206/12105 cut-off events. For 128584/128605 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 74893 event pairs, 2478 based on Foata normal form. 22/12095 useless extension candidates. Maximal degree in co-relation 60406. Up to 10115 conditions per place. [2024-06-27 17:52:34,729 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 145 selfloop transitions, 106 changer transitions 0/266 dead transitions. [2024-06-27 17:52:34,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 266 transitions, 2927 flow [2024-06-27 17:52:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 321 transitions. [2024-06-27 17:52:34,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-27 17:52:34,731 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 1641 flow. Second operand 9 states and 321 transitions. [2024-06-27 17:52:34,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 266 transitions, 2927 flow [2024-06-27 17:52:34,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 266 transitions, 2909 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:52:34,887 INFO L231 Difference]: Finished difference. Result has 133 places, 201 transitions, 2187 flow [2024-06-27 17:52:34,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2187, PETRI_PLACES=133, PETRI_TRANSITIONS=201} [2024-06-27 17:52:34,888 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-06-27 17:52:34,888 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 201 transitions, 2187 flow [2024-06-27 17:52:34,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:34,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:34,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:52:34,888 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:34,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash -525704492, now seen corresponding path program 2 times [2024-06-27 17:52:34,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51485522] [2024-06-27 17:52:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:34,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:34,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51485522] [2024-06-27 17:52:34,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51485522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:34,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:34,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873065534] [2024-06-27 17:52:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:34,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:34,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 201 transitions, 2187 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:34,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:34,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:36,155 INFO L124 PetriNetUnfolderBase]: 8643/12800 cut-off events. [2024-06-27 17:52:36,155 INFO L125 PetriNetUnfolderBase]: For 162071/162089 co-relation queries the response was YES. [2024-06-27 17:52:36,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71066 conditions, 12800 events. 8643/12800 cut-off events. For 162071/162089 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 80046 event pairs, 2511 based on Foata normal form. 20/12805 useless extension candidates. Maximal degree in co-relation 71008. Up to 10966 conditions per place. [2024-06-27 17:52:36,266 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 194 selfloop transitions, 80 changer transitions 0/289 dead transitions. [2024-06-27 17:52:36,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 289 transitions, 3587 flow [2024-06-27 17:52:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:52:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:52:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-06-27 17:52:36,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:52:36,268 INFO L175 Difference]: Start difference. First operand has 133 places, 201 transitions, 2187 flow. Second operand 7 states and 259 transitions. [2024-06-27 17:52:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 289 transitions, 3587 flow [2024-06-27 17:52:36,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 289 transitions, 3355 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:36,648 INFO L231 Difference]: Finished difference. Result has 139 places, 230 transitions, 2637 flow [2024-06-27 17:52:36,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=139, PETRI_TRANSITIONS=230} [2024-06-27 17:52:36,649 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-06-27 17:52:36,649 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 230 transitions, 2637 flow [2024-06-27 17:52:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:36,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:36,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:36,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:52:36,650 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:36,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash -525694262, now seen corresponding path program 3 times [2024-06-27 17:52:36,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:36,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342294733] [2024-06-27 17:52:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:36,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342294733] [2024-06-27 17:52:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342294733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:36,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907734534] [2024-06-27 17:52:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:36,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:36,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:36,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 230 transitions, 2637 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:36,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:36,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:36,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:38,043 INFO L124 PetriNetUnfolderBase]: 8708/13029 cut-off events. [2024-06-27 17:52:38,043 INFO L125 PetriNetUnfolderBase]: For 180071/180091 co-relation queries the response was YES. [2024-06-27 17:52:38,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74267 conditions, 13029 events. 8708/13029 cut-off events. For 180071/180091 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 82360 event pairs, 2875 based on Foata normal form. 22/13030 useless extension candidates. Maximal degree in co-relation 74205. Up to 11032 conditions per place. [2024-06-27 17:52:38,148 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 188 selfloop transitions, 95 changer transitions 0/298 dead transitions. [2024-06-27 17:52:38,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 298 transitions, 3764 flow [2024-06-27 17:52:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:52:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:52:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 284 transitions. [2024-06-27 17:52:38,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:52:38,150 INFO L175 Difference]: Start difference. First operand has 139 places, 230 transitions, 2637 flow. Second operand 8 states and 284 transitions. [2024-06-27 17:52:38,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 298 transitions, 3764 flow [2024-06-27 17:52:38,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 298 transitions, 3647 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:38,469 INFO L231 Difference]: Finished difference. Result has 147 places, 244 transitions, 3029 flow [2024-06-27 17:52:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3029, PETRI_PLACES=147, PETRI_TRANSITIONS=244} [2024-06-27 17:52:38,470 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2024-06-27 17:52:38,470 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 244 transitions, 3029 flow [2024-06-27 17:52:38,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:38,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:38,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:52:38,470 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:38,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash 872372554, now seen corresponding path program 4 times [2024-06-27 17:52:38,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:38,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962295816] [2024-06-27 17:52:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:38,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962295816] [2024-06-27 17:52:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962295816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:38,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:38,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:38,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867525755] [2024-06-27 17:52:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:38,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:38,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:38,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 244 transitions, 3029 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:38,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:39,895 INFO L124 PetriNetUnfolderBase]: 9210/13604 cut-off events. [2024-06-27 17:52:39,895 INFO L125 PetriNetUnfolderBase]: For 206111/206131 co-relation queries the response was YES. [2024-06-27 17:52:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81138 conditions, 13604 events. 9210/13604 cut-off events. For 206111/206131 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 85397 event pairs, 2492 based on Foata normal form. 22/13605 useless extension candidates. Maximal degree in co-relation 81072. Up to 11129 conditions per place. [2024-06-27 17:52:40,047 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 186 selfloop transitions, 148 changer transitions 0/349 dead transitions. [2024-06-27 17:52:40,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 349 transitions, 4697 flow [2024-06-27 17:52:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 322 transitions. [2024-06-27 17:52:40,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6625514403292181 [2024-06-27 17:52:40,049 INFO L175 Difference]: Start difference. First operand has 147 places, 244 transitions, 3029 flow. Second operand 9 states and 322 transitions. [2024-06-27 17:52:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 349 transitions, 4697 flow [2024-06-27 17:52:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 349 transitions, 4574 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:40,536 INFO L231 Difference]: Finished difference. Result has 155 places, 281 transitions, 3792 flow [2024-06-27 17:52:40,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3792, PETRI_PLACES=155, PETRI_TRANSITIONS=281} [2024-06-27 17:52:40,537 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 95 predicate places. [2024-06-27 17:52:40,537 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 281 transitions, 3792 flow [2024-06-27 17:52:40,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:40,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:40,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:52:40,537 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:40,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash -178656196, now seen corresponding path program 1 times [2024-06-27 17:52:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:40,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23380306] [2024-06-27 17:52:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23380306] [2024-06-27 17:52:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23380306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:40,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:40,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109680301] [2024-06-27 17:52:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:40,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:40,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:40,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:40,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 281 transitions, 3792 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:40,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:42,228 INFO L124 PetriNetUnfolderBase]: 9372/13811 cut-off events. [2024-06-27 17:52:42,228 INFO L125 PetriNetUnfolderBase]: For 258365/258393 co-relation queries the response was YES. [2024-06-27 17:52:42,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89902 conditions, 13811 events. 9372/13811 cut-off events. For 258365/258393 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 87584 event pairs, 2088 based on Foata normal form. 29/13794 useless extension candidates. Maximal degree in co-relation 89832. Up to 11226 conditions per place. [2024-06-27 17:52:42,333 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 239 selfloop transitions, 71 changer transitions 0/337 dead transitions. [2024-06-27 17:52:42,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 337 transitions, 4950 flow [2024-06-27 17:52:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-06-27 17:52:42,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006172839506173 [2024-06-27 17:52:42,334 INFO L175 Difference]: Start difference. First operand has 155 places, 281 transitions, 3792 flow. Second operand 6 states and 227 transitions. [2024-06-27 17:52:42,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 337 transitions, 4950 flow [2024-06-27 17:52:42,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 337 transitions, 4741 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:42,752 INFO L231 Difference]: Finished difference. Result has 158 places, 287 transitions, 3867 flow [2024-06-27 17:52:42,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3591, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3867, PETRI_PLACES=158, PETRI_TRANSITIONS=287} [2024-06-27 17:52:42,753 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 98 predicate places. [2024-06-27 17:52:42,753 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 287 transitions, 3867 flow [2024-06-27 17:52:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:42,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:42,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:52:42,753 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash -178538086, now seen corresponding path program 2 times [2024-06-27 17:52:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042430927] [2024-06-27 17:52:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:42,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042430927] [2024-06-27 17:52:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042430927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:42,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:42,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679767944] [2024-06-27 17:52:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:42,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:42,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 287 transitions, 3867 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:42,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:42,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:42,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:44,332 INFO L124 PetriNetUnfolderBase]: 9608/14521 cut-off events. [2024-06-27 17:52:44,332 INFO L125 PetriNetUnfolderBase]: For 285383/285521 co-relation queries the response was YES. [2024-06-27 17:52:44,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93258 conditions, 14521 events. 9608/14521 cut-off events. For 285383/285521 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 95951 event pairs, 3413 based on Foata normal form. 133/14516 useless extension candidates. Maximal degree in co-relation 93186. Up to 12182 conditions per place. [2024-06-27 17:52:44,472 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 236 selfloop transitions, 68 changer transitions 0/331 dead transitions. [2024-06-27 17:52:44,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 331 transitions, 4835 flow [2024-06-27 17:52:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-06-27 17:52:44,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-06-27 17:52:44,474 INFO L175 Difference]: Start difference. First operand has 158 places, 287 transitions, 3867 flow. Second operand 6 states and 219 transitions. [2024-06-27 17:52:44,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 331 transitions, 4835 flow [2024-06-27 17:52:45,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 331 transitions, 4687 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:45,128 INFO L231 Difference]: Finished difference. Result has 162 places, 290 transitions, 3937 flow [2024-06-27 17:52:45,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3937, PETRI_PLACES=162, PETRI_TRANSITIONS=290} [2024-06-27 17:52:45,128 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 102 predicate places. [2024-06-27 17:52:45,128 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 290 transitions, 3937 flow [2024-06-27 17:52:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:45,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:45,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:45,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:52:45,129 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:45,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 866123388, now seen corresponding path program 3 times [2024-06-27 17:52:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88865957] [2024-06-27 17:52:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88865957] [2024-06-27 17:52:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88865957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:45,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:45,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:52:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995129005] [2024-06-27 17:52:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:52:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:52:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:52:45,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:52:45,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 290 transitions, 3937 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:45,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:45,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:52:45,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:46,958 INFO L124 PetriNetUnfolderBase]: 9723/14276 cut-off events. [2024-06-27 17:52:46,958 INFO L125 PetriNetUnfolderBase]: For 280348/280376 co-relation queries the response was YES. [2024-06-27 17:52:47,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93145 conditions, 14276 events. 9723/14276 cut-off events. For 280348/280376 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 90253 event pairs, 2044 based on Foata normal form. 29/14285 useless extension candidates. Maximal degree in co-relation 93071. Up to 12149 conditions per place. [2024-06-27 17:52:47,073 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 256 selfloop transitions, 55 changer transitions 0/338 dead transitions. [2024-06-27 17:52:47,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 338 transitions, 4733 flow [2024-06-27 17:52:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-06-27 17:52:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.691358024691358 [2024-06-27 17:52:47,074 INFO L175 Difference]: Start difference. First operand has 162 places, 290 transitions, 3937 flow. Second operand 6 states and 224 transitions. [2024-06-27 17:52:47,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 338 transitions, 4733 flow [2024-06-27 17:52:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 338 transitions, 4577 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:47,601 INFO L231 Difference]: Finished difference. Result has 164 places, 292 transitions, 3957 flow [2024-06-27 17:52:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3957, PETRI_PLACES=164, PETRI_TRANSITIONS=292} [2024-06-27 17:52:47,602 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-06-27 17:52:47,602 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 292 transitions, 3957 flow [2024-06-27 17:52:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:52:47,603 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:47,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash -92636848, now seen corresponding path program 1 times [2024-06-27 17:52:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:47,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104864598] [2024-06-27 17:52:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104864598] [2024-06-27 17:52:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104864598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554458832] [2024-06-27 17:52:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:47,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:47,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 292 transitions, 3957 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:47,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:47,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:49,252 INFO L124 PetriNetUnfolderBase]: 9987/14908 cut-off events. [2024-06-27 17:52:49,252 INFO L125 PetriNetUnfolderBase]: For 292675/292701 co-relation queries the response was YES. [2024-06-27 17:52:49,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95480 conditions, 14908 events. 9987/14908 cut-off events. For 292675/292701 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 96654 event pairs, 3516 based on Foata normal form. 22/14795 useless extension candidates. Maximal degree in co-relation 95405. Up to 13069 conditions per place. [2024-06-27 17:52:49,396 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 253 selfloop transitions, 62 changer transitions 0/330 dead transitions. [2024-06-27 17:52:49,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 330 transitions, 4777 flow [2024-06-27 17:52:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-27 17:52:49,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:52:49,397 INFO L175 Difference]: Start difference. First operand has 164 places, 292 transitions, 3957 flow. Second operand 6 states and 213 transitions. [2024-06-27 17:52:49,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 330 transitions, 4777 flow [2024-06-27 17:52:49,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 330 transitions, 4658 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:52:49,983 INFO L231 Difference]: Finished difference. Result has 167 places, 292 transitions, 3971 flow [2024-06-27 17:52:49,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3971, PETRI_PLACES=167, PETRI_TRANSITIONS=292} [2024-06-27 17:52:49,983 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-06-27 17:52:49,983 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 292 transitions, 3971 flow [2024-06-27 17:52:49,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:49,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:49,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:52:49,984 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:49,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash -100258384, now seen corresponding path program 1 times [2024-06-27 17:52:49,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:49,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207335500] [2024-06-27 17:52:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:49,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207335500] [2024-06-27 17:52:50,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207335500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:50,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:50,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:50,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753061559] [2024-06-27 17:52:50,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:50,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:50,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:50,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:50,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 292 transitions, 3971 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:50,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:50,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:50,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:51,965 INFO L124 PetriNetUnfolderBase]: 10372/15450 cut-off events. [2024-06-27 17:52:51,966 INFO L125 PetriNetUnfolderBase]: For 323812/323838 co-relation queries the response was YES. [2024-06-27 17:52:52,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99529 conditions, 15450 events. 10372/15450 cut-off events. For 323812/323838 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 100551 event pairs, 3012 based on Foata normal form. 40/15346 useless extension candidates. Maximal degree in co-relation 99452. Up to 12874 conditions per place. [2024-06-27 17:52:52,126 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 265 selfloop transitions, 69 changer transitions 0/349 dead transitions. [2024-06-27 17:52:52,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 349 transitions, 5139 flow [2024-06-27 17:52:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-06-27 17:52:52,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.691358024691358 [2024-06-27 17:52:52,128 INFO L175 Difference]: Start difference. First operand has 167 places, 292 transitions, 3971 flow. Second operand 6 states and 224 transitions. [2024-06-27 17:52:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 349 transitions, 5139 flow [2024-06-27 17:52:52,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 349 transitions, 4973 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:52:52,730 INFO L231 Difference]: Finished difference. Result has 168 places, 298 transitions, 4097 flow [2024-06-27 17:52:52,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=168, PETRI_TRANSITIONS=298} [2024-06-27 17:52:52,730 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 108 predicate places. [2024-06-27 17:52:52,731 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 298 transitions, 4097 flow [2024-06-27 17:52:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:52,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:52,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:52,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:52:52,731 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:52,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:52,732 INFO L85 PathProgramCache]: Analyzing trace with hash -92639824, now seen corresponding path program 2 times [2024-06-27 17:52:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:52,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118296409] [2024-06-27 17:52:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:52,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118296409] [2024-06-27 17:52:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118296409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954402241] [2024-06-27 17:52:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:52,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:52,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 298 transitions, 4097 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:52,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:52,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:52,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:54,840 INFO L124 PetriNetUnfolderBase]: 10563/15790 cut-off events. [2024-06-27 17:52:54,840 INFO L125 PetriNetUnfolderBase]: For 357407/357433 co-relation queries the response was YES. [2024-06-27 17:52:54,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103777 conditions, 15790 events. 10563/15790 cut-off events. For 357407/357433 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 103666 event pairs, 3603 based on Foata normal form. 40/15692 useless extension candidates. Maximal degree in co-relation 103699. Up to 13699 conditions per place. [2024-06-27 17:52:55,009 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 263 selfloop transitions, 65 changer transitions 0/343 dead transitions. [2024-06-27 17:52:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 343 transitions, 5053 flow [2024-06-27 17:52:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-06-27 17:52:55,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:52:55,010 INFO L175 Difference]: Start difference. First operand has 168 places, 298 transitions, 4097 flow. Second operand 6 states and 216 transitions. [2024-06-27 17:52:55,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 343 transitions, 5053 flow [2024-06-27 17:52:55,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 343 transitions, 4889 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 17:52:55,885 INFO L231 Difference]: Finished difference. Result has 172 places, 301 transitions, 4154 flow [2024-06-27 17:52:55,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4154, PETRI_PLACES=172, PETRI_TRANSITIONS=301} [2024-06-27 17:52:55,886 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-06-27 17:52:55,886 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 301 transitions, 4154 flow [2024-06-27 17:52:55,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:55,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:55,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:55,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:52:55,887 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:55,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1966139314, now seen corresponding path program 2 times [2024-06-27 17:52:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718877752] [2024-06-27 17:52:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:55,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718877752] [2024-06-27 17:52:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718877752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:55,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119527234] [2024-06-27 17:52:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:55,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:56,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:56,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 301 transitions, 4154 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:56,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:56,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:56,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:57,676 INFO L124 PetriNetUnfolderBase]: 10556/15545 cut-off events. [2024-06-27 17:52:57,676 INFO L125 PetriNetUnfolderBase]: For 349841/349851 co-relation queries the response was YES. [2024-06-27 17:52:57,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102603 conditions, 15545 events. 10556/15545 cut-off events. For 349841/349851 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 99803 event pairs, 2826 based on Foata normal form. 7/15502 useless extension candidates. Maximal degree in co-relation 102523. Up to 13850 conditions per place. [2024-06-27 17:52:57,833 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 254 selfloop transitions, 65 changer transitions 0/334 dead transitions. [2024-06-27 17:52:57,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 334 transitions, 4872 flow [2024-06-27 17:52:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:52:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:52:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-06-27 17:52:57,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:52:57,834 INFO L175 Difference]: Start difference. First operand has 172 places, 301 transitions, 4154 flow. Second operand 6 states and 210 transitions. [2024-06-27 17:52:57,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 334 transitions, 4872 flow [2024-06-27 17:52:58,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 334 transitions, 4703 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 17:52:58,661 INFO L231 Difference]: Finished difference. Result has 174 places, 301 transitions, 4124 flow [2024-06-27 17:52:58,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4124, PETRI_PLACES=174, PETRI_TRANSITIONS=301} [2024-06-27 17:52:58,662 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 114 predicate places. [2024-06-27 17:52:58,662 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 301 transitions, 4124 flow [2024-06-27 17:52:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:58,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:58,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:58,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:52:58,663 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash 18161833, now seen corresponding path program 1 times [2024-06-27 17:52:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862401807] [2024-06-27 17:52:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:58,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:58,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862401807] [2024-06-27 17:52:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862401807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:52:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597535836] [2024-06-27 17:52:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:52:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:52:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:52:58,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:52:58,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 301 transitions, 4124 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:58,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:58,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:52:58,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:01,528 INFO L124 PetriNetUnfolderBase]: 10647/15753 cut-off events. [2024-06-27 17:53:01,528 INFO L125 PetriNetUnfolderBase]: For 359589/359599 co-relation queries the response was YES. [2024-06-27 17:53:01,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103474 conditions, 15753 events. 10647/15753 cut-off events. For 359589/359599 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 101585 event pairs, 2824 based on Foata normal form. 11/15711 useless extension candidates. Maximal degree in co-relation 103393. Up to 12988 conditions per place. [2024-06-27 17:53:01,679 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 186 selfloop transitions, 174 changer transitions 0/375 dead transitions. [2024-06-27 17:53:01,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 375 transitions, 5648 flow [2024-06-27 17:53:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 319 transitions. [2024-06-27 17:53:01,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6563786008230452 [2024-06-27 17:53:01,681 INFO L175 Difference]: Start difference. First operand has 174 places, 301 transitions, 4124 flow. Second operand 9 states and 319 transitions. [2024-06-27 17:53:01,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 375 transitions, 5648 flow [2024-06-27 17:53:02,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 375 transitions, 5424 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:02,471 INFO L231 Difference]: Finished difference. Result has 179 places, 314 transitions, 4573 flow [2024-06-27 17:53:02,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4573, PETRI_PLACES=179, PETRI_TRANSITIONS=314} [2024-06-27 17:53:02,472 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-06-27 17:53:02,472 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 314 transitions, 4573 flow [2024-06-27 17:53:02,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:02,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:02,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:53:02,473 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:02,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash 883351973, now seen corresponding path program 2 times [2024-06-27 17:53:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:02,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843617956] [2024-06-27 17:53:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843617956] [2024-06-27 17:53:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843617956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:02,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909436281] [2024-06-27 17:53:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:02,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:02,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:02,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 314 transitions, 4573 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:02,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:04,727 INFO L124 PetriNetUnfolderBase]: 10731/15703 cut-off events. [2024-06-27 17:53:04,727 INFO L125 PetriNetUnfolderBase]: For 360244/360264 co-relation queries the response was YES. [2024-06-27 17:53:04,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106666 conditions, 15703 events. 10731/15703 cut-off events. For 360244/360264 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 99561 event pairs, 2534 based on Foata normal form. 22/15714 useless extension candidates. Maximal degree in co-relation 106583. Up to 13699 conditions per place. [2024-06-27 17:53:04,894 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 258 selfloop transitions, 101 changer transitions 0/374 dead transitions. [2024-06-27 17:53:04,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 374 transitions, 5840 flow [2024-06-27 17:53:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:53:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:53:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 285 transitions. [2024-06-27 17:53:04,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-06-27 17:53:04,896 INFO L175 Difference]: Start difference. First operand has 179 places, 314 transitions, 4573 flow. Second operand 8 states and 285 transitions. [2024-06-27 17:53:04,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 374 transitions, 5840 flow [2024-06-27 17:53:05,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 374 transitions, 5324 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:05,789 INFO L231 Difference]: Finished difference. Result has 181 places, 320 transitions, 4408 flow [2024-06-27 17:53:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4408, PETRI_PLACES=181, PETRI_TRANSITIONS=320} [2024-06-27 17:53:05,789 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 121 predicate places. [2024-06-27 17:53:05,790 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 320 transitions, 4408 flow [2024-06-27 17:53:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:53:05,790 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:05,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 883144583, now seen corresponding path program 3 times [2024-06-27 17:53:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400069463] [2024-06-27 17:53:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400069463] [2024-06-27 17:53:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400069463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699671025] [2024-06-27 17:53:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:05,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:05,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 320 transitions, 4408 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:05,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:07,901 INFO L124 PetriNetUnfolderBase]: 10710/15758 cut-off events. [2024-06-27 17:53:07,901 INFO L125 PetriNetUnfolderBase]: For 369932/369952 co-relation queries the response was YES. [2024-06-27 17:53:08,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105162 conditions, 15758 events. 10710/15758 cut-off events. For 369932/369952 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 100696 event pairs, 2792 based on Foata normal form. 22/15751 useless extension candidates. Maximal degree in co-relation 105078. Up to 13683 conditions per place. [2024-06-27 17:53:08,196 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 260 selfloop transitions, 98 changer transitions 0/373 dead transitions. [2024-06-27 17:53:08,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 373 transitions, 5495 flow [2024-06-27 17:53:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 258 transitions. [2024-06-27 17:53:08,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-06-27 17:53:08,197 INFO L175 Difference]: Start difference. First operand has 181 places, 320 transitions, 4408 flow. Second operand 7 states and 258 transitions. [2024-06-27 17:53:08,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 373 transitions, 5495 flow [2024-06-27 17:53:09,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 373 transitions, 5280 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:09,031 INFO L231 Difference]: Finished difference. Result has 182 places, 320 transitions, 4414 flow [2024-06-27 17:53:09,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4414, PETRI_PLACES=182, PETRI_TRANSITIONS=320} [2024-06-27 17:53:09,031 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 122 predicate places. [2024-06-27 17:53:09,031 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 320 transitions, 4414 flow [2024-06-27 17:53:09,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:09,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:09,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:53:09,032 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:09,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 883021296, now seen corresponding path program 3 times [2024-06-27 17:53:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:09,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058508049] [2024-06-27 17:53:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058508049] [2024-06-27 17:53:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058508049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:09,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:09,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:09,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958839555] [2024-06-27 17:53:09,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:09,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:09,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 320 transitions, 4414 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:09,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:09,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:11,307 INFO L124 PetriNetUnfolderBase]: 10848/15932 cut-off events. [2024-06-27 17:53:11,307 INFO L125 PetriNetUnfolderBase]: For 384019/384039 co-relation queries the response was YES. [2024-06-27 17:53:11,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106224 conditions, 15932 events. 10848/15932 cut-off events. For 384019/384039 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 102097 event pairs, 2268 based on Foata normal form. 36/15937 useless extension candidates. Maximal degree in co-relation 106140. Up to 13915 conditions per place. [2024-06-27 17:53:11,459 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 298 selfloop transitions, 55 changer transitions 0/368 dead transitions. [2024-06-27 17:53:11,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 368 transitions, 5292 flow [2024-06-27 17:53:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-06-27 17:53:11,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6820987654320988 [2024-06-27 17:53:11,460 INFO L175 Difference]: Start difference. First operand has 182 places, 320 transitions, 4414 flow. Second operand 6 states and 221 transitions. [2024-06-27 17:53:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 368 transitions, 5292 flow [2024-06-27 17:53:12,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 368 transitions, 5025 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:12,347 INFO L231 Difference]: Finished difference. Result has 180 places, 322 transitions, 4321 flow [2024-06-27 17:53:12,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4321, PETRI_PLACES=180, PETRI_TRANSITIONS=322} [2024-06-27 17:53:12,347 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 120 predicate places. [2024-06-27 17:53:12,347 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 322 transitions, 4321 flow [2024-06-27 17:53:12,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:12,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:53:12,348 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:12,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 883359909, now seen corresponding path program 1 times [2024-06-27 17:53:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:12,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979570723] [2024-06-27 17:53:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:12,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:12,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979570723] [2024-06-27 17:53:12,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979570723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:12,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:12,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250343453] [2024-06-27 17:53:12,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 322 transitions, 4321 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:12,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:14,623 INFO L124 PetriNetUnfolderBase]: 11003/16078 cut-off events. [2024-06-27 17:53:14,623 INFO L125 PetriNetUnfolderBase]: For 375738/375758 co-relation queries the response was YES. [2024-06-27 17:53:14,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107416 conditions, 16078 events. 11003/16078 cut-off events. For 375738/375758 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 101959 event pairs, 2531 based on Foata normal form. 28/16093 useless extension candidates. Maximal degree in co-relation 107332. Up to 14485 conditions per place. [2024-06-27 17:53:14,771 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 304 selfloop transitions, 39 changer transitions 0/358 dead transitions. [2024-06-27 17:53:14,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 358 transitions, 5249 flow [2024-06-27 17:53:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-06-27 17:53:14,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 17:53:14,773 INFO L175 Difference]: Start difference. First operand has 180 places, 322 transitions, 4321 flow. Second operand 6 states and 207 transitions. [2024-06-27 17:53:14,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 358 transitions, 5249 flow [2024-06-27 17:53:15,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 358 transitions, 5121 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:15,777 INFO L231 Difference]: Finished difference. Result has 182 places, 325 transitions, 4363 flow [2024-06-27 17:53:15,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4363, PETRI_PLACES=182, PETRI_TRANSITIONS=325} [2024-06-27 17:53:15,778 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 122 predicate places. [2024-06-27 17:53:15,778 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 325 transitions, 4363 flow [2024-06-27 17:53:15,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:15,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:15,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:53:15,779 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:15,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -705732407, now seen corresponding path program 1 times [2024-06-27 17:53:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:15,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928728107] [2024-06-27 17:53:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928728107] [2024-06-27 17:53:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928728107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:15,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022172111] [2024-06-27 17:53:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:15,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:53:15,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 325 transitions, 4363 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:15,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:53:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:18,116 INFO L124 PetriNetUnfolderBase]: 10528/15848 cut-off events. [2024-06-27 17:53:18,117 INFO L125 PetriNetUnfolderBase]: For 416766/417045 co-relation queries the response was YES. [2024-06-27 17:53:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106988 conditions, 15848 events. 10528/15848 cut-off events. For 416766/417045 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 105592 event pairs, 3416 based on Foata normal form. 123/15607 useless extension candidates. Maximal degree in co-relation 106903. Up to 13833 conditions per place. [2024-06-27 17:53:18,276 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 281 selfloop transitions, 33 changer transitions 0/346 dead transitions. [2024-06-27 17:53:18,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 346 transitions, 5041 flow [2024-06-27 17:53:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2024-06-27 17:53:18,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-27 17:53:18,277 INFO L175 Difference]: Start difference. First operand has 182 places, 325 transitions, 4363 flow. Second operand 5 states and 173 transitions. [2024-06-27 17:53:18,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 346 transitions, 5041 flow [2024-06-27 17:53:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 346 transitions, 4913 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:19,120 INFO L231 Difference]: Finished difference. Result has 183 places, 325 transitions, 4319 flow [2024-06-27 17:53:19,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4319, PETRI_PLACES=183, PETRI_TRANSITIONS=325} [2024-06-27 17:53:19,121 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 123 predicate places. [2024-06-27 17:53:19,121 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 325 transitions, 4319 flow [2024-06-27 17:53:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:19,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:19,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:19,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:53:19,121 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:19,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1390690283, now seen corresponding path program 4 times [2024-06-27 17:53:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:19,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748974052] [2024-06-27 17:53:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748974052] [2024-06-27 17:53:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748974052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:19,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802889537] [2024-06-27 17:53:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:19,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:19,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 325 transitions, 4319 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:19,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:19,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:19,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:21,680 INFO L124 PetriNetUnfolderBase]: 11146/16392 cut-off events. [2024-06-27 17:53:21,680 INFO L125 PetriNetUnfolderBase]: For 408323/408327 co-relation queries the response was YES. [2024-06-27 17:53:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109497 conditions, 16392 events. 11146/16392 cut-off events. For 408323/408327 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 105340 event pairs, 2830 based on Foata normal form. 4/16309 useless extension candidates. Maximal degree in co-relation 109411. Up to 13087 conditions per place. [2024-06-27 17:53:21,863 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 184 selfloop transitions, 213 changer transitions 0/412 dead transitions. [2024-06-27 17:53:21,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 412 transitions, 6252 flow [2024-06-27 17:53:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:53:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:53:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-06-27 17:53:21,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772486772486772 [2024-06-27 17:53:21,864 INFO L175 Difference]: Start difference. First operand has 183 places, 325 transitions, 4319 flow. Second operand 7 states and 256 transitions. [2024-06-27 17:53:21,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 412 transitions, 6252 flow [2024-06-27 17:53:22,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 412 transitions, 6168 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:53:22,700 INFO L231 Difference]: Finished difference. Result has 188 places, 360 transitions, 5421 flow [2024-06-27 17:53:22,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5421, PETRI_PLACES=188, PETRI_TRANSITIONS=360} [2024-06-27 17:53:22,701 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 128 predicate places. [2024-06-27 17:53:22,701 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 360 transitions, 5421 flow [2024-06-27 17:53:22,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:22,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:22,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:53:22,702 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:22,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1077397905, now seen corresponding path program 5 times [2024-06-27 17:53:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129897643] [2024-06-27 17:53:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:22,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:22,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129897643] [2024-06-27 17:53:22,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129897643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:22,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:22,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972193124] [2024-06-27 17:53:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:22,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:22,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:22,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 360 transitions, 5421 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:22,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:22,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand