./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_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/safe000_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/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe000_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 17:49:15,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:49:15,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:49:15,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:49:15,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:49:15,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:49:15,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:49:15,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:49:15,142 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:49:15,145 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:49:15,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:49:15,146 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:49:15,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:49:15,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:49:15,149 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:49:15,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:49:15,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:49:15,149 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:49:15,150 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:49:15,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:49:15,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:49:15,151 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:49:15,151 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:49:15,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:49:15,151 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:49:15,152 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:49:15,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:49:15,152 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:49:15,153 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:49:15,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:49:15,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:49:15,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:49:15,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:15,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:49:15,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:49:15,155 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:49:15,155 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:49:15,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:49:15,156 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:49:15,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:49:15,156 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:49:15,156 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:49:15,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:49:15,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:49:15,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:49:15,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:49:15,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:49:15,473 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:49:15,474 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:49:15,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:49:15,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:49:15,623 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:49:15,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:49:16,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:49:17,106 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:49:17,107 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:49:17,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15cdcca0e/72d1ae09a27043acbd7f6c4b91452e91/FLAG7f474f683 [2024-06-27 17:49:17,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15cdcca0e/72d1ae09a27043acbd7f6c4b91452e91 [2024-06-27 17:49:17,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:49:17,141 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:49:17,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:17,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:49:17,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:49:17,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:15" (1/2) ... [2024-06-27 17:49:17,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213f34b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:17, skipping insertion in model container [2024-06-27 17:49:17,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:15" (1/2) ... [2024-06-27 17:49:17,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42441b44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:17, skipping insertion in model container [2024-06-27 17:49:17,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:17" (2/2) ... [2024-06-27 17:49:17,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213f34b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17, skipping insertion in model container [2024-06-27 17:49:17,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:17" (2/2) ... [2024-06-27 17:49:17,153 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:49:17,193 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:49:17,194 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 17:49:17,195 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 17:49:17,195 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 17:49:17,195 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:49:17,195 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 17:49:17,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:49:17,410 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/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:49:17,577 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:17,587 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:49:17,627 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/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:49:17,715 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:17,759 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:49:17,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17 WrapperNode [2024-06-27 17:49:17,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:17,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:17,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:49:17,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:49:17,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,823 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-27 17:49:17,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:17,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:49:17,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:49:17,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:49:17,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,849 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 17:49:17,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:49:17,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:49:17,863 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:49:17,863 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:49:17,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (1/1) ... [2024-06-27 17:49:17,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:49:17,889 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 17:49:17,891 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 17:49:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:49:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:49:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:49:17,918 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:49:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:49:17,918 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:49:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:49:17,919 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:49:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:49:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:49:17,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:49:17,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:49:17,921 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 17:49:18,086 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:49:18,088 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:49:18,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:49:18,262 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:49:18,354 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:49:18,355 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:49:18,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:18 BoogieIcfgContainer [2024-06-27 17:49:18,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:49:18,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:49:18,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:49:18,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:49:18,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:15" (1/4) ... [2024-06-27 17:49:18,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f3da1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:18, skipping insertion in model container [2024-06-27 17:49:18,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:49:17" (2/4) ... [2024-06-27 17:49:18,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f3da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:18, skipping insertion in model container [2024-06-27 17:49:18,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:17" (3/4) ... [2024-06-27 17:49:18,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f3da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:18, skipping insertion in model container [2024-06-27 17:49:18,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:18" (4/4) ... [2024-06-27 17:49:18,365 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:49:18,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:49:18,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:49:18,382 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:49:18,421 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:49:18,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:49:18,485 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-27 17:49:18,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-27 17:49:18,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-27 17:49:18,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-27 17:49:18,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:49:18,507 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;@fadda18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:49:18,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:49:18,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:49:18,511 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:49:18,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:18,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:18,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:49:18,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:18,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-27 17:49:18,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553388402] [2024-06-27 17:49:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:18,866 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 17:49:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553388402] [2024-06-27 17:49:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553388402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:18,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:18,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184779081] [2024-06-27 17:49:18,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:18,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:18,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-27 17:49:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:18,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:18,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-27 17:49:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:19,292 INFO L124 PetriNetUnfolderBase]: 759/1271 cut-off events. [2024-06-27 17:49:19,293 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:49:19,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1271 events. 759/1271 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6825 event pairs, 414 based on Foata normal form. 1/1250 useless extension candidates. Maximal degree in co-relation 2463. Up to 1147 conditions per place. [2024-06-27 17:49:19,311 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 31 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-27 17:49:19,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 187 flow [2024-06-27 17:49:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-27 17:49:19,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2024-06-27 17:49:19,327 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 98 transitions. [2024-06-27 17:49:19,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 187 flow [2024-06-27 17:49:19,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:19,336 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-27 17:49:19,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 17:49:19,343 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-27 17:49:19,343 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-27 17:49:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:19,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:19,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:19,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:49:19,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:19,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash -483895311, now seen corresponding path program 1 times [2024-06-27 17:49:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:19,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591779772] [2024-06-27 17:49:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:19,562 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 17:49:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:19,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591779772] [2024-06-27 17:49:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591779772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:19,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:19,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915506878] [2024-06-27 17:49:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:19,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:19,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:19,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 17:49:19,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:19,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:19,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:19,915 INFO L124 PetriNetUnfolderBase]: 1224/2160 cut-off events. [2024-06-27 17:49:19,915 INFO L125 PetriNetUnfolderBase]: For 305/315 co-relation queries the response was YES. [2024-06-27 17:49:19,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4578 conditions, 2160 events. 1224/2160 cut-off events. For 305/315 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12619 event pairs, 628 based on Foata normal form. 6/2142 useless extension candidates. Maximal degree in co-relation 4566. Up to 1784 conditions per place. [2024-06-27 17:49:19,934 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 46 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-27 17:49:19,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 286 flow [2024-06-27 17:49:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 17:49:19,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-27 17:49:19,941 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 125 transitions. [2024-06-27 17:49:19,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 286 flow [2024-06-27 17:49:19,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:19,944 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 166 flow [2024-06-27 17:49:19,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 17:49:19,945 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-27 17:49:19,946 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 166 flow [2024-06-27 17:49:19,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 17:49:19,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:49:19,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:19,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1946832050, now seen corresponding path program 1 times [2024-06-27 17:49:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177815166] [2024-06-27 17:49:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:20,153 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 17:49:20,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177815166] [2024-06-27 17:49:20,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177815166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:20,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:20,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366142716] [2024-06-27 17:49:20,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:20,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:20,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:20,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 17:49:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:20,453 INFO L124 PetriNetUnfolderBase]: 1215/1985 cut-off events. [2024-06-27 17:49:20,453 INFO L125 PetriNetUnfolderBase]: For 815/854 co-relation queries the response was YES. [2024-06-27 17:49:20,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 1985 events. 1215/1985 cut-off events. For 815/854 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10867 event pairs, 298 based on Foata normal form. 19/1999 useless extension candidates. Maximal degree in co-relation 4851. Up to 1731 conditions per place. [2024-06-27 17:49:20,472 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 52 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-27 17:49:20,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 354 flow [2024-06-27 17:49:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 17:49:20,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-27 17:49:20,477 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 166 flow. Second operand 5 states and 151 transitions. [2024-06-27 17:49:20,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 354 flow [2024-06-27 17:49:20,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 352 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:20,482 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 197 flow [2024-06-27 17:49:20,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-27 17:49:20,483 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-06-27 17:49:20,484 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 197 flow [2024-06-27 17:49:20,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 17:49:20,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:20,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:49:20,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:20,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -576324553, now seen corresponding path program 1 times [2024-06-27 17:49:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174394684] [2024-06-27 17:49:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:20,668 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 17:49:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174394684] [2024-06-27 17:49:20,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174394684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:20,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:20,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497465004] [2024-06-27 17:49:20,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:20,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:20,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:20,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:20,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 17:49:20,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:20,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:20,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:20,942 INFO L124 PetriNetUnfolderBase]: 1490/2424 cut-off events. [2024-06-27 17:49:20,943 INFO L125 PetriNetUnfolderBase]: For 1693/1693 co-relation queries the response was YES. [2024-06-27 17:49:20,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 2424 events. 1490/2424 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13858 event pairs, 746 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 6252. Up to 2172 conditions per place. [2024-06-27 17:49:20,964 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 51 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-06-27 17:49:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 370 flow [2024-06-27 17:49:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 17:49:20,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 17:49:20,967 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 197 flow. Second operand 4 states and 117 transitions. [2024-06-27 17:49:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 370 flow [2024-06-27 17:49:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 347 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:20,975 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 224 flow [2024-06-27 17:49:20,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 17:49:20,977 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-06-27 17:49:20,977 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 224 flow [2024-06-27 17:49:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 17:49:20,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:20,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:20,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:49:20,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 25433884, now seen corresponding path program 1 times [2024-06-27 17:49:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:20,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747494167] [2024-06-27 17:49:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:21,131 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 17:49:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747494167] [2024-06-27 17:49:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747494167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:21,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464240414] [2024-06-27 17:49:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:21,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:21,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 17:49:21,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:21,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:21,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:21,442 INFO L124 PetriNetUnfolderBase]: 1470/2396 cut-off events. [2024-06-27 17:49:21,443 INFO L125 PetriNetUnfolderBase]: For 2576/2638 co-relation queries the response was YES. [2024-06-27 17:49:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2396 events. 1470/2396 cut-off events. For 2576/2638 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13706 event pairs, 435 based on Foata normal form. 14/2383 useless extension candidates. Maximal degree in co-relation 6805. Up to 2030 conditions per place. [2024-06-27 17:49:21,464 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 56 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-27 17:49:21,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 482 flow [2024-06-27 17:49:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 17:49:21,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6844444444444444 [2024-06-27 17:49:21,467 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 224 flow. Second operand 5 states and 154 transitions. [2024-06-27 17:49:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 482 flow [2024-06-27 17:49:21,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:21,477 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 302 flow [2024-06-27 17:49:21,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 17:49:21,481 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2024-06-27 17:49:21,482 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 302 flow [2024-06-27 17:49:21,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 17:49:21,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:21,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:21,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:49:21,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:21,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 595151510, now seen corresponding path program 1 times [2024-06-27 17:49:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:21,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731222775] [2024-06-27 17:49:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:21,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:21,649 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 17:49:21,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731222775] [2024-06-27 17:49:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731222775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:21,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085004220] [2024-06-27 17:49:21,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:21,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:21,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:21,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:21,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:21,999 INFO L124 PetriNetUnfolderBase]: 1639/2669 cut-off events. [2024-06-27 17:49:21,999 INFO L125 PetriNetUnfolderBase]: For 3773/3779 co-relation queries the response was YES. [2024-06-27 17:49:22,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 2669 events. 1639/2669 cut-off events. For 3773/3779 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15591 event pairs, 424 based on Foata normal form. 10/2665 useless extension candidates. Maximal degree in co-relation 7981. Up to 2193 conditions per place. [2024-06-27 17:49:22,027 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-27 17:49:22,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 580 flow [2024-06-27 17:49:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:49:22,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:49:22,029 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 302 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:49:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 580 flow [2024-06-27 17:49:22,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 563 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:22,040 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 415 flow [2024-06-27 17:49:22,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 17:49:22,042 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2024-06-27 17:49:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 415 flow [2024-06-27 17:49:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:22,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:22,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:49:22,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:22,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 595151324, now seen corresponding path program 2 times [2024-06-27 17:49:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:22,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098349592] [2024-06-27 17:49:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:22,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:22,205 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 17:49:22,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:22,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098349592] [2024-06-27 17:49:22,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098349592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:22,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:22,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:22,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422347356] [2024-06-27 17:49:22,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:22,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:22,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:22,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 415 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 17:49:22,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:22,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:22,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:22,533 INFO L124 PetriNetUnfolderBase]: 1576/2565 cut-off events. [2024-06-27 17:49:22,533 INFO L125 PetriNetUnfolderBase]: For 6887/6991 co-relation queries the response was YES. [2024-06-27 17:49:22,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9236 conditions, 2565 events. 1576/2565 cut-off events. For 6887/6991 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14828 event pairs, 425 based on Foata normal form. 18/2545 useless extension candidates. Maximal degree in co-relation 9210. Up to 2171 conditions per place. [2024-06-27 17:49:22,567 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 61 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-27 17:49:22,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 615 flow [2024-06-27 17:49:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 17:49:22,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-27 17:49:22,569 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 415 flow. Second operand 4 states and 125 transitions. [2024-06-27 17:49:22,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 615 flow [2024-06-27 17:49:22,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 588 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:22,586 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 426 flow [2024-06-27 17:49:22,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-27 17:49:22,589 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2024-06-27 17:49:22,589 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 426 flow [2024-06-27 17:49:22,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 17:49:22,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:22,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:22,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:49:22,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:22,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash -714930956, now seen corresponding path program 2 times [2024-06-27 17:49:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406567846] [2024-06-27 17:49:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:22,732 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 17:49:22,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:22,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406567846] [2024-06-27 17:49:22,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406567846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:22,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:22,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115390571] [2024-06-27 17:49:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:22,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:22,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 426 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:22,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:22,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:23,049 INFO L124 PetriNetUnfolderBase]: 1626/2632 cut-off events. [2024-06-27 17:49:23,050 INFO L125 PetriNetUnfolderBase]: For 6670/6676 co-relation queries the response was YES. [2024-06-27 17:49:23,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9475 conditions, 2632 events. 1626/2632 cut-off events. For 6670/6676 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15163 event pairs, 487 based on Foata normal form. 6/2628 useless extension candidates. Maximal degree in co-relation 9447. Up to 2294 conditions per place. [2024-06-27 17:49:23,074 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 74 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-06-27 17:49:23,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-27 17:49:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-27 17:49:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:49:23,076 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 426 flow. Second operand 5 states and 145 transitions. [2024-06-27 17:49:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-27 17:49:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 700 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:23,092 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 536 flow [2024-06-27 17:49:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 17:49:23,093 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-27 17:49:23,093 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 536 flow [2024-06-27 17:49:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:23,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:49:23,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash -714922028, now seen corresponding path program 1 times [2024-06-27 17:49:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:23,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874138202] [2024-06-27 17:49:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:23,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:23,222 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 17:49:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874138202] [2024-06-27 17:49:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874138202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602550642] [2024-06-27 17:49:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:23,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:23,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:23,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:23,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:23,532 INFO L124 PetriNetUnfolderBase]: 1618/2603 cut-off events. [2024-06-27 17:49:23,533 INFO L125 PetriNetUnfolderBase]: For 8166/8169 co-relation queries the response was YES. [2024-06-27 17:49:23,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 2603 events. 1618/2603 cut-off events. For 8166/8169 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14918 event pairs, 441 based on Foata normal form. 6/2602 useless extension candidates. Maximal degree in co-relation 9939. Up to 2321 conditions per place. [2024-06-27 17:49:23,557 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 84 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2024-06-27 17:49:23,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 795 flow [2024-06-27 17:49:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-27 17:49:23,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-27 17:49:23,559 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 536 flow. Second operand 5 states and 143 transitions. [2024-06-27 17:49:23,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 795 flow [2024-06-27 17:49:23,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 779 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:23,572 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 565 flow [2024-06-27 17:49:23,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=565, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-27 17:49:23,573 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-27 17:49:23,573 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 565 flow [2024-06-27 17:49:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 17:49:23,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:23,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:23,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:49:23,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:23,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 788451806, now seen corresponding path program 1 times [2024-06-27 17:49:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:23,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796424409] [2024-06-27 17:49:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:23,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:23,725 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 17:49:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796424409] [2024-06-27 17:49:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796424409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:23,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:23,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091896899] [2024-06-27 17:49:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:23,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:23,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:23,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:23,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:23,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:24,215 INFO L124 PetriNetUnfolderBase]: 1765/2877 cut-off events. [2024-06-27 17:49:24,215 INFO L125 PetriNetUnfolderBase]: For 10578/10587 co-relation queries the response was YES. [2024-06-27 17:49:24,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 2877 events. 1765/2877 cut-off events. For 10578/10587 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16966 event pairs, 406 based on Foata normal form. 10/2873 useless extension candidates. Maximal degree in co-relation 11209. Up to 2154 conditions per place. [2024-06-27 17:49:24,240 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 92 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-27 17:49:24,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 152 transitions, 1185 flow [2024-06-27 17:49:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-27 17:49:24,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617283950617284 [2024-06-27 17:49:24,243 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 565 flow. Second operand 9 states and 268 transitions. [2024-06-27 17:49:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 152 transitions, 1185 flow [2024-06-27 17:49:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1158 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:24,261 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 777 flow [2024-06-27 17:49:24,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-27 17:49:24,262 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-06-27 17:49:24,262 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 777 flow [2024-06-27 17:49:24,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:24,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:24,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:49:24,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:24,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1269828842, now seen corresponding path program 2 times [2024-06-27 17:49:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93509953] [2024-06-27 17:49:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:24,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:24,413 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 17:49:24,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:24,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93509953] [2024-06-27 17:49:24,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93509953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:24,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:24,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:24,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112465583] [2024-06-27 17:49:24,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:24,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:24,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:24,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:24,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 777 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:24,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:24,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:24,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:24,919 INFO L124 PetriNetUnfolderBase]: 1898/3098 cut-off events. [2024-06-27 17:49:24,919 INFO L125 PetriNetUnfolderBase]: For 15344/15353 co-relation queries the response was YES. [2024-06-27 17:49:24,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13714 conditions, 3098 events. 1898/3098 cut-off events. For 15344/15353 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18480 event pairs, 459 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 13677. Up to 2397 conditions per place. [2024-06-27 17:49:24,947 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 104 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2024-06-27 17:49:24,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 163 transitions, 1492 flow [2024-06-27 17:49:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 17:49:24,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-06-27 17:49:24,954 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 777 flow. Second operand 8 states and 241 transitions. [2024-06-27 17:49:24,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 163 transitions, 1492 flow [2024-06-27 17:49:24,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 1374 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:24,990 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 999 flow [2024-06-27 17:49:24,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-27 17:49:24,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-27 17:49:24,991 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 999 flow [2024-06-27 17:49:24,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:24,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:24,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:24,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:49:24,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:24,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1269823262, now seen corresponding path program 3 times [2024-06-27 17:49:24,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:24,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633686885] [2024-06-27 17:49:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,150 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 17:49:25,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633686885] [2024-06-27 17:49:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633686885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:25,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436155724] [2024-06-27 17:49:25,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:25,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:25,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:25,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:25,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:25,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:25,592 INFO L124 PetriNetUnfolderBase]: 1889/3085 cut-off events. [2024-06-27 17:49:25,592 INFO L125 PetriNetUnfolderBase]: For 17558/17573 co-relation queries the response was YES. [2024-06-27 17:49:25,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 3085 events. 1889/3085 cut-off events. For 17558/17573 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18450 event pairs, 459 based on Foata normal form. 14/3080 useless extension candidates. Maximal degree in co-relation 14261. Up to 2390 conditions per place. [2024-06-27 17:49:25,625 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 96 selfloop transitions, 43 changer transitions 0/152 dead transitions. [2024-06-27 17:49:25,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1434 flow [2024-06-27 17:49:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 17:49:25,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-27 17:49:25,627 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 999 flow. Second operand 6 states and 187 transitions. [2024-06-27 17:49:25,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1434 flow [2024-06-27 17:49:25,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1345 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:25,682 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1007 flow [2024-06-27 17:49:25,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-27 17:49:25,683 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-06-27 17:49:25,683 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1007 flow [2024-06-27 17:49:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:25,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:49:25,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -688021940, now seen corresponding path program 4 times [2024-06-27 17:49:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503480060] [2024-06-27 17:49:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:25,801 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 17:49:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:25,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503480060] [2024-06-27 17:49:25,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503480060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14099072] [2024-06-27 17:49:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:25,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:25,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:25,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:25,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:25,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:25,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,246 INFO L124 PetriNetUnfolderBase]: 1884/3070 cut-off events. [2024-06-27 17:49:26,246 INFO L125 PetriNetUnfolderBase]: For 18636/18651 co-relation queries the response was YES. [2024-06-27 17:49:26,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 3070 events. 1884/3070 cut-off events. For 18636/18651 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18214 event pairs, 458 based on Foata normal form. 12/3074 useless extension candidates. Maximal degree in co-relation 14497. Up to 2576 conditions per place. [2024-06-27 17:49:26,280 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 127 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2024-06-27 17:49:26,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1556 flow [2024-06-27 17:49:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 17:49:26,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-27 17:49:26,283 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1007 flow. Second operand 8 states and 227 transitions. [2024-06-27 17:49:26,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1556 flow [2024-06-27 17:49:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:26,329 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1140 flow [2024-06-27 17:49:26,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1140, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-27 17:49:26,330 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-27 17:49:26,331 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1140 flow [2024-06-27 17:49:26,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:26,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:26,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:26,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:49:26,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -337261788, now seen corresponding path program 1 times [2024-06-27 17:49:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:26,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830426459] [2024-06-27 17:49:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:26,450 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 17:49:26,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:26,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830426459] [2024-06-27 17:49:26,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830426459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:26,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:26,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:26,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81898178] [2024-06-27 17:49:26,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:26,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:26,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:26,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:26,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1140 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 17:49:26,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:26,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:26,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:26,835 INFO L124 PetriNetUnfolderBase]: 1756/2876 cut-off events. [2024-06-27 17:49:26,835 INFO L125 PetriNetUnfolderBase]: For 20621/20637 co-relation queries the response was YES. [2024-06-27 17:49:26,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14081 conditions, 2876 events. 1756/2876 cut-off events. For 20621/20637 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17222 event pairs, 417 based on Foata normal form. 20/2871 useless extension candidates. Maximal degree in co-relation 14036. Up to 2373 conditions per place. [2024-06-27 17:49:26,928 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 99 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 17:49:26,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1442 flow [2024-06-27 17:49:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:49:26,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-27 17:49:26,929 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1140 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:49:26,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1442 flow [2024-06-27 17:49:26,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1359 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:26,969 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1119 flow [2024-06-27 17:49:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1119, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-27 17:49:26,970 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-06-27 17:49:26,970 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1119 flow [2024-06-27 17:49:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 17:49:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:26,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:49:26,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:26,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1509517467, now seen corresponding path program 1 times [2024-06-27 17:49:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390765223] [2024-06-27 17:49:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:27,089 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 17:49:27,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:27,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390765223] [2024-06-27 17:49:27,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390765223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:27,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:27,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:27,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485031115] [2024-06-27 17:49:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:27,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:27,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:27,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1119 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:27,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:27,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:27,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:27,603 INFO L124 PetriNetUnfolderBase]: 1810/2952 cut-off events. [2024-06-27 17:49:27,603 INFO L125 PetriNetUnfolderBase]: For 24235/24334 co-relation queries the response was YES. [2024-06-27 17:49:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14773 conditions, 2952 events. 1810/2952 cut-off events. For 24235/24334 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17642 event pairs, 257 based on Foata normal form. 60/2930 useless extension candidates. Maximal degree in co-relation 14727. Up to 2287 conditions per place. [2024-06-27 17:49:27,638 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 111 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-27 17:49:27,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 166 transitions, 1601 flow [2024-06-27 17:49:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 17:49:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-27 17:49:27,642 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1119 flow. Second operand 6 states and 182 transitions. [2024-06-27 17:49:27,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 166 transitions, 1601 flow [2024-06-27 17:49:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1549 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:27,695 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1194 flow [2024-06-27 17:49:27,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1194, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-27 17:49:27,697 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2024-06-27 17:49:27,697 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1194 flow [2024-06-27 17:49:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:49:27,698 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:27,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1512374427, now seen corresponding path program 2 times [2024-06-27 17:49:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850439201] [2024-06-27 17:49:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:27,855 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 17:49:27,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:27,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850439201] [2024-06-27 17:49:27,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850439201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:27,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:27,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:27,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246031261] [2024-06-27 17:49:27,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:27,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:27,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:27,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:27,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:27,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:27,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:27,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:27,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:27,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:28,338 INFO L124 PetriNetUnfolderBase]: 1826/2974 cut-off events. [2024-06-27 17:49:28,338 INFO L125 PetriNetUnfolderBase]: For 27531/27649 co-relation queries the response was YES. [2024-06-27 17:49:28,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15282 conditions, 2974 events. 1826/2974 cut-off events. For 27531/27649 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17789 event pairs, 369 based on Foata normal form. 52/2932 useless extension candidates. Maximal degree in co-relation 15235. Up to 2423 conditions per place. [2024-06-27 17:49:28,375 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 111 selfloop transitions, 29 changer transitions 0/165 dead transitions. [2024-06-27 17:49:28,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1590 flow [2024-06-27 17:49:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:49:28,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:49:28,377 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1194 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:49:28,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1590 flow [2024-06-27 17:49:28,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1524 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:28,439 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1229 flow [2024-06-27 17:49:28,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1229, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-27 17:49:28,439 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 60 predicate places. [2024-06-27 17:49:28,440 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1229 flow [2024-06-27 17:49:28,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:28,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:28,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:49:28,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:28,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 709811931, now seen corresponding path program 3 times [2024-06-27 17:49:28,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:28,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452131515] [2024-06-27 17:49:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,575 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 17:49:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452131515] [2024-06-27 17:49:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452131515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407095273] [2024-06-27 17:49:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:28,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:28,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1229 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:28,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:28,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:29,012 INFO L124 PetriNetUnfolderBase]: 1813/2959 cut-off events. [2024-06-27 17:49:29,012 INFO L125 PetriNetUnfolderBase]: For 27903/28032 co-relation queries the response was YES. [2024-06-27 17:49:29,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15163 conditions, 2959 events. 1813/2959 cut-off events. For 27903/28032 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17669 event pairs, 253 based on Foata normal form. 65/2935 useless extension candidates. Maximal degree in co-relation 15114. Up to 2373 conditions per place. [2024-06-27 17:49:29,040 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 106 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-27 17:49:29,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 1567 flow [2024-06-27 17:49:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-27 17:49:29,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 17:49:29,042 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1229 flow. Second operand 5 states and 153 transitions. [2024-06-27 17:49:29,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 1567 flow [2024-06-27 17:49:29,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1498 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:29,101 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1230 flow [2024-06-27 17:49:29,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1230, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-27 17:49:29,102 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 61 predicate places. [2024-06-27 17:49:29,102 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1230 flow [2024-06-27 17:49:29,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 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 17:49:29,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:29,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:29,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:49:29,103 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:29,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash 709996629, now seen corresponding path program 1 times [2024-06-27 17:49:29,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:29,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313869769] [2024-06-27 17:49:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:29,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:29,221 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 17:49:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313869769] [2024-06-27 17:49:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313869769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:29,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:29,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:29,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150509322] [2024-06-27 17:49:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:29,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:29,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1230 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:29,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:29,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:29,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:29,682 INFO L124 PetriNetUnfolderBase]: 2128/3438 cut-off events. [2024-06-27 17:49:29,682 INFO L125 PetriNetUnfolderBase]: For 32423/32441 co-relation queries the response was YES. [2024-06-27 17:49:29,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17031 conditions, 3438 events. 2128/3438 cut-off events. For 32423/32441 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20778 event pairs, 412 based on Foata normal form. 36/3457 useless extension candidates. Maximal degree in co-relation 16981. Up to 2681 conditions per place. [2024-06-27 17:49:29,711 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 122 selfloop transitions, 32 changer transitions 0/167 dead transitions. [2024-06-27 17:49:29,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 167 transitions, 1688 flow [2024-06-27 17:49:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:49:29,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:49:29,713 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1230 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:49:29,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 167 transitions, 1688 flow [2024-06-27 17:49:29,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1625 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:29,784 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1307 flow [2024-06-27 17:49:29,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-27 17:49:29,784 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-27 17:49:29,785 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1307 flow [2024-06-27 17:49:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:29,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:29,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:49:29,785 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:29,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 554154173, now seen corresponding path program 2 times [2024-06-27 17:49:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359313622] [2024-06-27 17:49:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:29,910 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 17:49:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359313622] [2024-06-27 17:49:29,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359313622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:29,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:29,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046279954] [2024-06-27 17:49:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:29,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:29,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:29,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:29,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1307 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:29,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:29,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:29,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,394 INFO L124 PetriNetUnfolderBase]: 2155/3535 cut-off events. [2024-06-27 17:49:30,394 INFO L125 PetriNetUnfolderBase]: For 33180/33198 co-relation queries the response was YES. [2024-06-27 17:49:30,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18029 conditions, 3535 events. 2155/3535 cut-off events. For 33180/33198 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21740 event pairs, 773 based on Foata normal form. 16/3508 useless extension candidates. Maximal degree in co-relation 17978. Up to 3029 conditions per place. [2024-06-27 17:49:30,429 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 137 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-06-27 17:49:30,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1718 flow [2024-06-27 17:49:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:49:30,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:49:30,431 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1307 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:49:30,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1718 flow [2024-06-27 17:49:30,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 168 transitions, 1618 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:30,539 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1284 flow [2024-06-27 17:49:30,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1284, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-27 17:49:30,539 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-27 17:49:30,540 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1284 flow [2024-06-27 17:49:30,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:30,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:30,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:30,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:49:30,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:30,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash 554393183, now seen corresponding path program 3 times [2024-06-27 17:49:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:30,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985154628] [2024-06-27 17:49:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:30,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:30,671 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 17:49:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985154628] [2024-06-27 17:49:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985154628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:30,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113685566] [2024-06-27 17:49:30,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:30,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:30,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:30,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:30,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1284 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:30,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:30,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:31,160 INFO L124 PetriNetUnfolderBase]: 2147/3515 cut-off events. [2024-06-27 17:49:31,161 INFO L125 PetriNetUnfolderBase]: For 32007/32025 co-relation queries the response was YES. [2024-06-27 17:49:31,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17384 conditions, 3515 events. 2147/3515 cut-off events. For 32007/32025 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21563 event pairs, 708 based on Foata normal form. 16/3488 useless extension candidates. Maximal degree in co-relation 17332. Up to 2932 conditions per place. [2024-06-27 17:49:31,202 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 136 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2024-06-27 17:49:31,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1715 flow [2024-06-27 17:49:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:49:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 17:49:31,204 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1284 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:49:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1715 flow [2024-06-27 17:49:31,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1658 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:31,276 INFO L231 Difference]: Finished difference. Result has 117 places, 142 transitions, 1335 flow [2024-06-27 17:49:31,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1335, PETRI_PLACES=117, PETRI_TRANSITIONS=142} [2024-06-27 17:49:31,277 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2024-06-27 17:49:31,277 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 142 transitions, 1335 flow [2024-06-27 17:49:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 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 17:49:31,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:31,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:31,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:49:31,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:31,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -449597377, now seen corresponding path program 1 times [2024-06-27 17:49:31,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:31,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459096768] [2024-06-27 17:49:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:31,421 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 17:49:31,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:31,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459096768] [2024-06-27 17:49:31,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459096768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817985647] [2024-06-27 17:49:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:31,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:31,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:31,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:31,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 142 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:31,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:31,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:31,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:32,251 INFO L124 PetriNetUnfolderBase]: 3340/5481 cut-off events. [2024-06-27 17:49:32,251 INFO L125 PetriNetUnfolderBase]: For 66533/66551 co-relation queries the response was YES. [2024-06-27 17:49:32,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26948 conditions, 5481 events. 3340/5481 cut-off events. For 66533/66551 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37278 event pairs, 537 based on Foata normal form. 54/5518 useless extension candidates. Maximal degree in co-relation 26894. Up to 2325 conditions per place. [2024-06-27 17:49:32,303 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 149 selfloop transitions, 71 changer transitions 0/233 dead transitions. [2024-06-27 17:49:32,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 233 transitions, 2430 flow [2024-06-27 17:49:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 285 transitions. [2024-06-27 17:49:32,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-27 17:49:32,305 INFO L175 Difference]: Start difference. First operand has 117 places, 142 transitions, 1335 flow. Second operand 9 states and 285 transitions. [2024-06-27 17:49:32,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 233 transitions, 2430 flow [2024-06-27 17:49:32,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 233 transitions, 2362 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:32,472 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1614 flow [2024-06-27 17:49:32,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1614, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-27 17:49:32,474 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 76 predicate places. [2024-06-27 17:49:32,474 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1614 flow [2024-06-27 17:49:32,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:32,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:32,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:49:32,475 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:32,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash -360883747, now seen corresponding path program 2 times [2024-06-27 17:49:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292482059] [2024-06-27 17:49:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:32,622 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 17:49:32,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292482059] [2024-06-27 17:49:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292482059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162421917] [2024-06-27 17:49:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:32,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:32,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:32,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:32,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:32,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:32,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:32,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:33,517 INFO L124 PetriNetUnfolderBase]: 3701/6078 cut-off events. [2024-06-27 17:49:33,517 INFO L125 PetriNetUnfolderBase]: For 82117/82135 co-relation queries the response was YES. [2024-06-27 17:49:33,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30736 conditions, 6078 events. 3701/6078 cut-off events. For 82117/82135 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42188 event pairs, 1079 based on Foata normal form. 62/6119 useless extension candidates. Maximal degree in co-relation 30679. Up to 4549 conditions per place. [2024-06-27 17:49:33,585 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 131 selfloop transitions, 72 changer transitions 0/216 dead transitions. [2024-06-27 17:49:33,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2363 flow [2024-06-27 17:49:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:49:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:49:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-27 17:49:33,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-27 17:49:33,587 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1614 flow. Second operand 10 states and 297 transitions. [2024-06-27 17:49:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2363 flow [2024-06-27 17:49:33,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 216 transitions, 2217 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:33,839 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1672 flow [2024-06-27 17:49:33,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1672, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-27 17:49:33,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-27 17:49:33,840 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1672 flow [2024-06-27 17:49:33,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:33,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:33,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:33,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:49:33,841 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:33,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash -361031617, now seen corresponding path program 3 times [2024-06-27 17:49:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:33,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980496144] [2024-06-27 17:49:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:33,966 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 17:49:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:33,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980496144] [2024-06-27 17:49:33,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980496144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:33,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:33,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143932883] [2024-06-27 17:49:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:34,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:34,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:34,863 INFO L124 PetriNetUnfolderBase]: 4307/7100 cut-off events. [2024-06-27 17:49:34,863 INFO L125 PetriNetUnfolderBase]: For 94023/94041 co-relation queries the response was YES. [2024-06-27 17:49:34,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35210 conditions, 7100 events. 4307/7100 cut-off events. For 94023/94041 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51074 event pairs, 1210 based on Foata normal form. 54/7137 useless extension candidates. Maximal degree in co-relation 35151. Up to 4446 conditions per place. [2024-06-27 17:49:34,918 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 145 selfloop transitions, 74 changer transitions 0/232 dead transitions. [2024-06-27 17:49:34,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 232 transitions, 2596 flow [2024-06-27 17:49:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:49:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:49:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 307 transitions. [2024-06-27 17:49:34,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6822222222222222 [2024-06-27 17:49:34,921 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1672 flow. Second operand 10 states and 307 transitions. [2024-06-27 17:49:34,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 232 transitions, 2596 flow [2024-06-27 17:49:35,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 232 transitions, 2427 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:49:35,085 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1768 flow [2024-06-27 17:49:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1768, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-27 17:49:35,086 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-27 17:49:35,086 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1768 flow [2024-06-27 17:49:35,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:35,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:35,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:35,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:49:35,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:35,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash 534845033, now seen corresponding path program 4 times [2024-06-27 17:49:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:35,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691017700] [2024-06-27 17:49:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:35,227 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 17:49:35,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691017700] [2024-06-27 17:49:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691017700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:35,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:35,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136473645] [2024-06-27 17:49:35,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:35,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:35,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1768 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:35,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:35,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:35,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:36,222 INFO L124 PetriNetUnfolderBase]: 4643/7651 cut-off events. [2024-06-27 17:49:36,222 INFO L125 PetriNetUnfolderBase]: For 107573/107591 co-relation queries the response was YES. [2024-06-27 17:49:36,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37939 conditions, 7651 events. 4643/7651 cut-off events. For 107573/107591 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 55814 event pairs, 1494 based on Foata normal form. 62/7701 useless extension candidates. Maximal degree in co-relation 37878. Up to 6227 conditions per place. [2024-06-27 17:49:36,288 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 147 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-27 17:49:36,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2456 flow [2024-06-27 17:49:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-27 17:49:36,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6641975308641975 [2024-06-27 17:49:36,290 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1768 flow. Second operand 9 states and 269 transitions. [2024-06-27 17:49:36,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2456 flow [2024-06-27 17:49:36,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 216 transitions, 2316 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:36,523 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1808 flow [2024-06-27 17:49:36,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1808, PETRI_PLACES=138, PETRI_TRANSITIONS=160} [2024-06-27 17:49:36,524 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-27 17:49:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1808 flow [2024-06-27 17:49:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:36,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:36,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:49:36,525 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:36,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash 529482653, now seen corresponding path program 5 times [2024-06-27 17:49:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:36,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256943692] [2024-06-27 17:49:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:36,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:36,659 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 17:49:36,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:36,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256943692] [2024-06-27 17:49:36,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256943692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:36,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:36,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:36,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095885761] [2024-06-27 17:49:36,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:36,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:36,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:36,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:36,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 160 transitions, 1808 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:36,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:36,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:36,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:37,600 INFO L124 PetriNetUnfolderBase]: 4969/8191 cut-off events. [2024-06-27 17:49:37,600 INFO L125 PetriNetUnfolderBase]: For 116279/116297 co-relation queries the response was YES. [2024-06-27 17:49:37,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40381 conditions, 8191 events. 4969/8191 cut-off events. For 116279/116297 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 60682 event pairs, 1611 based on Foata normal form. 62/8234 useless extension candidates. Maximal degree in co-relation 40318. Up to 6699 conditions per place. [2024-06-27 17:49:37,674 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 143 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-27 17:49:37,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2464 flow [2024-06-27 17:49:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 17:49:37,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-27 17:49:37,675 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1808 flow. Second operand 7 states and 217 transitions. [2024-06-27 17:49:37,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2464 flow [2024-06-27 17:49:37,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2321 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:37,903 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1839 flow [2024-06-27 17:49:37,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-27 17:49:37,904 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-27 17:49:37,904 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1839 flow [2024-06-27 17:49:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:37,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:37,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:49:37,905 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:37,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash 529334783, now seen corresponding path program 6 times [2024-06-27 17:49:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:37,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104435545] [2024-06-27 17:49:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:38,034 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 17:49:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104435545] [2024-06-27 17:49:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104435545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:38,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893573274] [2024-06-27 17:49:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:38,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:38,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:38,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1839 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:38,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:38,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:39,198 INFO L124 PetriNetUnfolderBase]: 5606/9202 cut-off events. [2024-06-27 17:49:39,198 INFO L125 PetriNetUnfolderBase]: For 133190/133208 co-relation queries the response was YES. [2024-06-27 17:49:39,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44795 conditions, 9202 events. 5606/9202 cut-off events. For 133190/133208 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 69654 event pairs, 1601 based on Foata normal form. 54/9235 useless extension candidates. Maximal degree in co-relation 44731. Up to 5947 conditions per place. [2024-06-27 17:49:39,286 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 155 selfloop transitions, 56 changer transitions 0/224 dead transitions. [2024-06-27 17:49:39,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2678 flow [2024-06-27 17:49:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-27 17:49:39,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-27 17:49:39,288 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1839 flow. Second operand 7 states and 223 transitions. [2024-06-27 17:49:39,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2678 flow [2024-06-27 17:49:39,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 224 transitions, 2539 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:39,587 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1957 flow [2024-06-27 17:49:39,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-27 17:49:39,588 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2024-06-27 17:49:39,588 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1957 flow [2024-06-27 17:49:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:39,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:39,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:39,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:49:39,589 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:39,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash 535060235, now seen corresponding path program 1 times [2024-06-27 17:49:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:39,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146200360] [2024-06-27 17:49:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:39,725 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 17:49:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146200360] [2024-06-27 17:49:39,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146200360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:39,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:39,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418722361] [2024-06-27 17:49:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:39,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:39,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:39,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:39,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:39,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:40,898 INFO L124 PetriNetUnfolderBase]: 5879/9703 cut-off events. [2024-06-27 17:49:40,899 INFO L125 PetriNetUnfolderBase]: For 144601/144619 co-relation queries the response was YES. [2024-06-27 17:49:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47134 conditions, 9703 events. 5879/9703 cut-off events. For 144601/144619 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 74751 event pairs, 1844 based on Foata normal form. 54/9743 useless extension candidates. Maximal degree in co-relation 47068. Up to 6966 conditions per place. [2024-06-27 17:49:41,002 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 152 selfloop transitions, 67 changer transitions 0/232 dead transitions. [2024-06-27 17:49:41,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2720 flow [2024-06-27 17:49:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-06-27 17:49:41,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6765432098765433 [2024-06-27 17:49:41,004 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1957 flow. Second operand 9 states and 274 transitions. [2024-06-27 17:49:41,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2720 flow [2024-06-27 17:49:41,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 232 transitions, 2537 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:41,430 INFO L231 Difference]: Finished difference. Result has 145 places, 170 transitions, 1976 flow [2024-06-27 17:49:41,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1976, PETRI_PLACES=145, PETRI_TRANSITIONS=170} [2024-06-27 17:49:41,431 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-27 17:49:41,431 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 170 transitions, 1976 flow [2024-06-27 17:49:41,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:41,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:49:41,431 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:41,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807, now seen corresponding path program 7 times [2024-06-27 17:49:41,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852382008] [2024-06-27 17:49:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:41,568 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 17:49:41,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852382008] [2024-06-27 17:49:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852382008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172659081] [2024-06-27 17:49:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:41,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:41,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 170 transitions, 1976 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:41,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:41,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:41,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,776 INFO L124 PetriNetUnfolderBase]: 5938/9930 cut-off events. [2024-06-27 17:49:42,776 INFO L125 PetriNetUnfolderBase]: For 142746/142764 co-relation queries the response was YES. [2024-06-27 17:49:42,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47315 conditions, 9930 events. 5938/9930 cut-off events. For 142746/142764 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 77629 event pairs, 3225 based on Foata normal form. 28/9896 useless extension candidates. Maximal degree in co-relation 47249. Up to 8825 conditions per place. [2024-06-27 17:49:42,867 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 180 selfloop transitions, 31 changer transitions 0/224 dead transitions. [2024-06-27 17:49:42,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 224 transitions, 2569 flow [2024-06-27 17:49:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 17:49:42,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:49:42,869 INFO L175 Difference]: Start difference. First operand has 145 places, 170 transitions, 1976 flow. Second operand 9 states and 255 transitions. [2024-06-27 17:49:42,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 224 transitions, 2569 flow [2024-06-27 17:49:43,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2391 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:43,257 INFO L231 Difference]: Finished difference. Result has 147 places, 171 transitions, 1895 flow [2024-06-27 17:49:43,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=147, PETRI_TRANSITIONS=171} [2024-06-27 17:49:43,257 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 98 predicate places. [2024-06-27 17:49:43,257 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 171 transitions, 1895 flow [2024-06-27 17:49:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:43,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:43,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:43,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:49:43,258 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:43,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1088605, now seen corresponding path program 2 times [2024-06-27 17:49:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:43,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563523753] [2024-06-27 17:49:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:43,375 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 17:49:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563523753] [2024-06-27 17:49:43,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563523753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:43,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111512112] [2024-06-27 17:49:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:43,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:43,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 171 transitions, 1895 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:43,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:43,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:43,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:44,572 INFO L124 PetriNetUnfolderBase]: 6005/10045 cut-off events. [2024-06-27 17:49:44,573 INFO L125 PetriNetUnfolderBase]: For 145409/145427 co-relation queries the response was YES. [2024-06-27 17:49:44,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47241 conditions, 10045 events. 6005/10045 cut-off events. For 145409/145427 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 78800 event pairs, 3223 based on Foata normal form. 24/10007 useless extension candidates. Maximal degree in co-relation 47174. Up to 8809 conditions per place. [2024-06-27 17:49:44,676 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 187 selfloop transitions, 34 changer transitions 0/234 dead transitions. [2024-06-27 17:49:44,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2538 flow [2024-06-27 17:49:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:49:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:49:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-27 17:49:44,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-06-27 17:49:44,677 INFO L175 Difference]: Start difference. First operand has 147 places, 171 transitions, 1895 flow. Second operand 10 states and 283 transitions. [2024-06-27 17:49:44,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2538 flow [2024-06-27 17:49:45,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 234 transitions, 2457 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:45,033 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1918 flow [2024-06-27 17:49:45,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1918, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-27 17:49:45,033 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-27 17:49:45,034 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1918 flow [2024-06-27 17:49:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:45,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:45,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:45,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:49:45,035 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:45,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 6320705, now seen corresponding path program 3 times [2024-06-27 17:49:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:45,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087171552] [2024-06-27 17:49:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:45,162 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 17:49:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:45,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087171552] [2024-06-27 17:49:45,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087171552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:45,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:45,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346966839] [2024-06-27 17:49:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:45,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:45,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:45,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:45,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:45,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:46,388 INFO L124 PetriNetUnfolderBase]: 5985/9969 cut-off events. [2024-06-27 17:49:46,389 INFO L125 PetriNetUnfolderBase]: For 146374/146392 co-relation queries the response was YES. [2024-06-27 17:49:46,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46727 conditions, 9969 events. 5985/9969 cut-off events. For 146374/146392 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 77662 event pairs, 3098 based on Foata normal form. 24/9939 useless extension candidates. Maximal degree in co-relation 46659. Up to 8230 conditions per place. [2024-06-27 17:49:46,478 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 174 selfloop transitions, 41 changer transitions 0/228 dead transitions. [2024-06-27 17:49:46,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 228 transitions, 2453 flow [2024-06-27 17:49:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-27 17:49:46,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345679012345679 [2024-06-27 17:49:46,481 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1918 flow. Second operand 9 states and 257 transitions. [2024-06-27 17:49:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 228 transitions, 2453 flow [2024-06-27 17:49:46,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 228 transitions, 2363 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 17:49:46,868 INFO L231 Difference]: Finished difference. Result has 150 places, 171 transitions, 1858 flow [2024-06-27 17:49:46,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1858, PETRI_PLACES=150, PETRI_TRANSITIONS=171} [2024-06-27 17:49:46,868 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-27 17:49:46,868 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 171 transitions, 1858 flow [2024-06-27 17:49:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 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 17:49:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:46,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:49:46,869 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:46,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1986008509, now seen corresponding path program 1 times [2024-06-27 17:49:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825609777] [2024-06-27 17:49:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,978 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 17:49:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825609777] [2024-06-27 17:49:46,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825609777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975226381] [2024-06-27 17:49:46,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:47,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:47,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 171 transitions, 1858 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 17:49:47,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:48,032 INFO L124 PetriNetUnfolderBase]: 5808/9640 cut-off events. [2024-06-27 17:49:48,033 INFO L125 PetriNetUnfolderBase]: For 147374/147414 co-relation queries the response was YES. [2024-06-27 17:49:48,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45892 conditions, 9640 events. 5808/9640 cut-off events. For 147374/147414 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 75367 event pairs, 1967 based on Foata normal form. 25/9617 useless extension candidates. Maximal degree in co-relation 45823. Up to 8676 conditions per place. [2024-06-27 17:49:48,278 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 143 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-06-27 17:49:48,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 206 transitions, 2548 flow [2024-06-27 17:49:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 17:49:48,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-27 17:49:48,279 INFO L175 Difference]: Start difference. First operand has 150 places, 171 transitions, 1858 flow. Second operand 6 states and 175 transitions. [2024-06-27 17:49:48,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 206 transitions, 2548 flow [2024-06-27 17:49:48,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 206 transitions, 2423 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 17:49:48,600 INFO L231 Difference]: Finished difference. Result has 149 places, 182 transitions, 1997 flow [2024-06-27 17:49:48,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1997, PETRI_PLACES=149, PETRI_TRANSITIONS=182} [2024-06-27 17:49:48,601 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2024-06-27 17:49:48,601 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 182 transitions, 1997 flow [2024-06-27 17:49:48,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 17:49:48,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:48,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:48,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:49:48,601 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2131475913, now seen corresponding path program 1 times [2024-06-27 17:49:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033421962] [2024-06-27 17:49:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,686 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 17:49:48,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033421962] [2024-06-27 17:49:48,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033421962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947229272] [2024-06-27 17:49:48,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:48,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:48,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 182 transitions, 1997 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 17:49:48,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:48,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:49,766 INFO L124 PetriNetUnfolderBase]: 6029/10101 cut-off events. [2024-06-27 17:49:49,766 INFO L125 PetriNetUnfolderBase]: For 160603/160606 co-relation queries the response was YES. [2024-06-27 17:49:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48510 conditions, 10101 events. 6029/10101 cut-off events. For 160603/160606 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 79562 event pairs, 3273 based on Foata normal form. 3/10070 useless extension candidates. Maximal degree in co-relation 48441. Up to 9158 conditions per place. [2024-06-27 17:49:49,861 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 184 selfloop transitions, 21 changer transitions 0/218 dead transitions. [2024-06-27 17:49:49,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 218 transitions, 2726 flow [2024-06-27 17:49:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 17:49:49,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 17:49:49,863 INFO L175 Difference]: Start difference. First operand has 149 places, 182 transitions, 1997 flow. Second operand 5 states and 144 transitions. [2024-06-27 17:49:49,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 218 transitions, 2726 flow [2024-06-27 17:49:50,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 218 transitions, 2665 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:50,300 INFO L231 Difference]: Finished difference. Result has 155 places, 195 transitions, 2204 flow [2024-06-27 17:49:50,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2204, PETRI_PLACES=155, PETRI_TRANSITIONS=195} [2024-06-27 17:49:50,301 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 106 predicate places. [2024-06-27 17:49:50,301 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 195 transitions, 2204 flow [2024-06-27 17:49:50,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 17:49:50,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:50,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:49:50,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:50,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-27 17:49:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098237206] [2024-06-27 17:49:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,443 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 17:49:50,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098237206] [2024-06-27 17:49:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098237206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533445354] [2024-06-27 17:49:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:50,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:50,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:49:50,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 195 transitions, 2204 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 17:49:50,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:50,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:49:50,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,497 INFO L124 PetriNetUnfolderBase]: 5949/9920 cut-off events. [2024-06-27 17:49:51,497 INFO L125 PetriNetUnfolderBase]: For 183406/183446 co-relation queries the response was YES. [2024-06-27 17:49:51,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49883 conditions, 9920 events. 5949/9920 cut-off events. For 183406/183446 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 78048 event pairs, 1987 based on Foata normal form. 46/9915 useless extension candidates. Maximal degree in co-relation 49810. Up to 8764 conditions per place. [2024-06-27 17:49:51,597 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 163 selfloop transitions, 36 changer transitions 0/224 dead transitions. [2024-06-27 17:49:51,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 224 transitions, 2743 flow [2024-06-27 17:49:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:49:51,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:49:51,598 INFO L175 Difference]: Start difference. First operand has 155 places, 195 transitions, 2204 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:49:51,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 224 transitions, 2743 flow [2024-06-27 17:49:52,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 224 transitions, 2689 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:52,084 INFO L231 Difference]: Finished difference. Result has 161 places, 198 transitions, 2287 flow [2024-06-27 17:49:52,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2287, PETRI_PLACES=161, PETRI_TRANSITIONS=198} [2024-06-27 17:49:52,085 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2024-06-27 17:49:52,085 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 198 transitions, 2287 flow [2024-06-27 17:49:52,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 17:49:52,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:52,085 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 17:49:52,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:49:52,085 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:52,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:52,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1948311287, now seen corresponding path program 1 times [2024-06-27 17:49:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:52,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962865536] [2024-06-27 17:49:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,196 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 17:49:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962865536] [2024-06-27 17:49:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962865536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636800057] [2024-06-27 17:49:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:52,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:52,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:52,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 2287 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:52,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:52,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:53,427 INFO L124 PetriNetUnfolderBase]: 6180/10290 cut-off events. [2024-06-27 17:49:53,427 INFO L125 PetriNetUnfolderBase]: For 182536/182551 co-relation queries the response was YES. [2024-06-27 17:49:53,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52106 conditions, 10290 events. 6180/10290 cut-off events. For 182536/182551 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 80566 event pairs, 3322 based on Foata normal form. 11/10255 useless extension candidates. Maximal degree in co-relation 52030. Up to 9405 conditions per place. [2024-06-27 17:49:53,516 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 200 selfloop transitions, 17 changer transitions 0/230 dead transitions. [2024-06-27 17:49:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2852 flow [2024-06-27 17:49:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 17:49:53,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-27 17:49:53,517 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 2287 flow. Second operand 6 states and 166 transitions. [2024-06-27 17:49:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2852 flow [2024-06-27 17:49:53,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 230 transitions, 2751 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:53,966 INFO L231 Difference]: Finished difference. Result has 164 places, 202 transitions, 2281 flow [2024-06-27 17:49:53,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=164, PETRI_TRANSITIONS=202} [2024-06-27 17:49:53,967 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 115 predicate places. [2024-06-27 17:49:53,967 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 202 transitions, 2281 flow [2024-06-27 17:49:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:53,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:53,967 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 17:49:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:49:53,967 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:53,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1925639747, now seen corresponding path program 2 times [2024-06-27 17:49:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870385623] [2024-06-27 17:49:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:54,082 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 17:49:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870385623] [2024-06-27 17:49:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870385623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:54,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:54,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:54,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490203505] [2024-06-27 17:49:54,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:54,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:54,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:54,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:54,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 202 transitions, 2281 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:54,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:54,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:54,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:55,396 INFO L124 PetriNetUnfolderBase]: 6191/10217 cut-off events. [2024-06-27 17:49:55,396 INFO L125 PetriNetUnfolderBase]: For 187611/187611 co-relation queries the response was YES. [2024-06-27 17:49:55,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51710 conditions, 10217 events. 6191/10217 cut-off events. For 187611/187611 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 79431 event pairs, 2053 based on Foata normal form. 1/10206 useless extension candidates. Maximal degree in co-relation 51632. Up to 9391 conditions per place. [2024-06-27 17:49:55,478 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 194 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-27 17:49:55,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 232 transitions, 2987 flow [2024-06-27 17:49:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 17:49:55,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 17:49:55,479 INFO L175 Difference]: Start difference. First operand has 164 places, 202 transitions, 2281 flow. Second operand 5 states and 140 transitions. [2024-06-27 17:49:55,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 232 transitions, 2987 flow [2024-06-27 17:49:55,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 232 transitions, 2943 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:55,928 INFO L231 Difference]: Finished difference. Result has 167 places, 212 transitions, 2453 flow [2024-06-27 17:49:55,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2453, PETRI_PLACES=167, PETRI_TRANSITIONS=212} [2024-06-27 17:49:55,928 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-27 17:49:55,928 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 212 transitions, 2453 flow [2024-06-27 17:49:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:55,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:55,928 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 17:49:55,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:49:55,929 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:55,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1925650907, now seen corresponding path program 3 times [2024-06-27 17:49:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103614870] [2024-06-27 17:49:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:55,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:56,049 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 17:49:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:56,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103614870] [2024-06-27 17:49:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103614870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399079606] [2024-06-27 17:49:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:56,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:56,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 212 transitions, 2453 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:56,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:56,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:56,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:57,223 INFO L124 PetriNetUnfolderBase]: 6188/10324 cut-off events. [2024-06-27 17:49:57,223 INFO L125 PetriNetUnfolderBase]: For 195781/195796 co-relation queries the response was YES. [2024-06-27 17:49:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 10324 events. 6188/10324 cut-off events. For 195781/195796 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 81054 event pairs, 3308 based on Foata normal form. 11/10288 useless extension candidates. Maximal degree in co-relation 52119. Up to 9388 conditions per place. [2024-06-27 17:49:57,330 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 203 selfloop transitions, 27 changer transitions 0/243 dead transitions. [2024-06-27 17:49:57,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 243 transitions, 3009 flow [2024-06-27 17:49:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 17:49:57,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 17:49:57,331 INFO L175 Difference]: Start difference. First operand has 167 places, 212 transitions, 2453 flow. Second operand 7 states and 190 transitions. [2024-06-27 17:49:57,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 243 transitions, 3009 flow [2024-06-27 17:49:58,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 243 transitions, 2980 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:58,236 INFO L231 Difference]: Finished difference. Result has 173 places, 212 transitions, 2488 flow [2024-06-27 17:49:58,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2488, PETRI_PLACES=173, PETRI_TRANSITIONS=212} [2024-06-27 17:49:58,236 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-27 17:49:58,237 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 212 transitions, 2488 flow [2024-06-27 17:49:58,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:58,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,237 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 17:49:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:49:58,237 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:49:58,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1907796413, now seen corresponding path program 4 times [2024-06-27 17:49:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488982000] [2024-06-27 17:49:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:58,354 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 17:49:58,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:58,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488982000] [2024-06-27 17:49:58,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488982000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:58,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:58,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:58,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506326917] [2024-06-27 17:49:58,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:58,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:58,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:58,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:49:58,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 212 transitions, 2488 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:49:58,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:58,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:49:58,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:59,786 INFO L124 PetriNetUnfolderBase]: 6185/10221 cut-off events. [2024-06-27 17:49:59,786 INFO L125 PetriNetUnfolderBase]: For 203024/203024 co-relation queries the response was YES. [2024-06-27 17:49:59,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52410 conditions, 10221 events. 6185/10221 cut-off events. For 203024/203024 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 79563 event pairs, 2057 based on Foata normal form. 1/10209 useless extension candidates. Maximal degree in co-relation 52328. Up to 9370 conditions per place. [2024-06-27 17:49:59,904 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 197 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2024-06-27 17:49:59,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 240 transitions, 3070 flow [2024-06-27 17:49:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 17:49:59,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 17:49:59,905 INFO L175 Difference]: Start difference. First operand has 173 places, 212 transitions, 2488 flow. Second operand 6 states and 162 transitions. [2024-06-27 17:49:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 240 transitions, 3070 flow [2024-06-27 17:50:00,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 3014 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:00,551 INFO L231 Difference]: Finished difference. Result has 175 places, 218 transitions, 2566 flow [2024-06-27 17:50:00,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2566, PETRI_PLACES=175, PETRI_TRANSITIONS=218} [2024-06-27 17:50:00,552 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-27 17:50:00,552 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 218 transitions, 2566 flow [2024-06-27 17:50:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:00,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:00,553 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 17:50:00,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:50:00,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:00,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:00,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1651245001, now seen corresponding path program 1 times [2024-06-27 17:50:00,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:00,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832465232] [2024-06-27 17:50:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:00,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:00,671 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 17:50:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832465232] [2024-06-27 17:50:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832465232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254235219] [2024-06-27 17:50:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:00,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 218 transitions, 2566 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:02,061 INFO L124 PetriNetUnfolderBase]: 6182/10209 cut-off events. [2024-06-27 17:50:02,061 INFO L125 PetriNetUnfolderBase]: For 213600/213603 co-relation queries the response was YES. [2024-06-27 17:50:02,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53889 conditions, 10209 events. 6182/10209 cut-off events. For 213600/213603 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 79563 event pairs, 2051 based on Foata normal form. 3/10203 useless extension candidates. Maximal degree in co-relation 53805. Up to 9388 conditions per place. [2024-06-27 17:50:02,168 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 207 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-27 17:50:02,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 3133 flow [2024-06-27 17:50:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 17:50:02,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-27 17:50:02,169 INFO L175 Difference]: Start difference. First operand has 175 places, 218 transitions, 2566 flow. Second operand 6 states and 166 transitions. [2024-06-27 17:50:02,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 3133 flow [2024-06-27 17:50:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 3037 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:02,687 INFO L231 Difference]: Finished difference. Result has 178 places, 219 transitions, 2543 flow [2024-06-27 17:50:02,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2543, PETRI_PLACES=178, PETRI_TRANSITIONS=219} [2024-06-27 17:50:02,688 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2024-06-27 17:50:02,688 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 219 transitions, 2543 flow [2024-06-27 17:50:02,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:02,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:02,688 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 17:50:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:50:02,688 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:02,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1439639828, now seen corresponding path program 1 times [2024-06-27 17:50:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:02,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806637305] [2024-06-27 17:50:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:02,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:02,818 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 17:50:02,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806637305] [2024-06-27 17:50:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806637305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:02,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:02,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:02,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031348932] [2024-06-27 17:50:02,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:02,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:02,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:02,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:02,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:02,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 219 transitions, 2543 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:02,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:02,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:02,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:04,078 INFO L124 PetriNetUnfolderBase]: 6207/10266 cut-off events. [2024-06-27 17:50:04,079 INFO L125 PetriNetUnfolderBase]: For 225187/225205 co-relation queries the response was YES. [2024-06-27 17:50:04,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54376 conditions, 10266 events. 6207/10266 cut-off events. For 225187/225205 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 80119 event pairs, 2078 based on Foata normal form. 13/10263 useless extension candidates. Maximal degree in co-relation 54291. Up to 9290 conditions per place. [2024-06-27 17:50:04,188 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 185 selfloop transitions, 49 changer transitions 0/247 dead transitions. [2024-06-27 17:50:04,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 247 transitions, 3253 flow [2024-06-27 17:50:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:50:04,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:50:04,189 INFO L175 Difference]: Start difference. First operand has 178 places, 219 transitions, 2543 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:50:04,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 247 transitions, 3253 flow [2024-06-27 17:50:04,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 247 transitions, 3189 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:04,743 INFO L231 Difference]: Finished difference. Result has 181 places, 225 transitions, 2737 flow [2024-06-27 17:50:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2737, PETRI_PLACES=181, PETRI_TRANSITIONS=225} [2024-06-27 17:50:04,744 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 132 predicate places. [2024-06-27 17:50:04,744 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 225 transitions, 2737 flow [2024-06-27 17:50:04,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:04,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:04,745 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 17:50:04,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:50:04,745 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:04,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash -492405720, now seen corresponding path program 2 times [2024-06-27 17:50:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:04,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691513569] [2024-06-27 17:50:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:04,846 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 17:50:04,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691513569] [2024-06-27 17:50:04,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691513569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:04,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119459959] [2024-06-27 17:50:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:04,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:04,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 225 transitions, 2737 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:04,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:04,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:04,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:06,118 INFO L124 PetriNetUnfolderBase]: 6232/10307 cut-off events. [2024-06-27 17:50:06,118 INFO L125 PetriNetUnfolderBase]: For 246251/246269 co-relation queries the response was YES. [2024-06-27 17:50:06,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56625 conditions, 10307 events. 6232/10307 cut-off events. For 246251/246269 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 80568 event pairs, 2115 based on Foata normal form. 13/10294 useless extension candidates. Maximal degree in co-relation 56538. Up to 9221 conditions per place. [2024-06-27 17:50:06,242 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 181 selfloop transitions, 70 changer transitions 0/264 dead transitions. [2024-06-27 17:50:06,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 3778 flow [2024-06-27 17:50:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:50:06,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:50:06,243 INFO L175 Difference]: Start difference. First operand has 181 places, 225 transitions, 2737 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:50:06,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 3778 flow [2024-06-27 17:50:06,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 264 transitions, 3671 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:06,964 INFO L231 Difference]: Finished difference. Result has 186 places, 237 transitions, 3082 flow [2024-06-27 17:50:06,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3082, PETRI_PLACES=186, PETRI_TRANSITIONS=237} [2024-06-27 17:50:06,965 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 137 predicate places. [2024-06-27 17:50:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 237 transitions, 3082 flow [2024-06-27 17:50:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:06,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:06,965 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 17:50:06,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:50:06,965 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:06,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -480977880, now seen corresponding path program 3 times [2024-06-27 17:50:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896835385] [2024-06-27 17:50:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:07,062 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 17:50:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896835385] [2024-06-27 17:50:07,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896835385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:07,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:07,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804358780] [2024-06-27 17:50:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:07,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:07,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 237 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:07,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:07,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:07,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:08,417 INFO L124 PetriNetUnfolderBase]: 6229/10303 cut-off events. [2024-06-27 17:50:08,417 INFO L125 PetriNetUnfolderBase]: For 255544/255562 co-relation queries the response was YES. [2024-06-27 17:50:08,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58253 conditions, 10303 events. 6229/10303 cut-off events. For 255544/255562 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 80471 event pairs, 2115 based on Foata normal form. 13/10290 useless extension candidates. Maximal degree in co-relation 58163. Up to 9219 conditions per place. [2024-06-27 17:50:08,519 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 177 selfloop transitions, 70 changer transitions 0/260 dead transitions. [2024-06-27 17:50:08,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 260 transitions, 3780 flow [2024-06-27 17:50:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 17:50:08,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 17:50:08,520 INFO L175 Difference]: Start difference. First operand has 186 places, 237 transitions, 3082 flow. Second operand 6 states and 171 transitions. [2024-06-27 17:50:08,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 260 transitions, 3780 flow [2024-06-27 17:50:09,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 260 transitions, 3670 flow, removed 55 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:09,398 INFO L231 Difference]: Finished difference. Result has 192 places, 237 transitions, 3118 flow [2024-06-27 17:50:09,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3118, PETRI_PLACES=192, PETRI_TRANSITIONS=237} [2024-06-27 17:50:09,398 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-27 17:50:09,398 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 237 transitions, 3118 flow [2024-06-27 17:50:09,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:09,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:09,399 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 17:50:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:50:09,399 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:09,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash -534893720, now seen corresponding path program 4 times [2024-06-27 17:50:09,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761070596] [2024-06-27 17:50:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:09,497 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 17:50:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:09,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761070596] [2024-06-27 17:50:09,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761070596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:09,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:09,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264252653] [2024-06-27 17:50:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:09,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:09,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 237 transitions, 3118 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:09,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:09,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:10,735 INFO L124 PetriNetUnfolderBase]: 6223/10288 cut-off events. [2024-06-27 17:50:10,735 INFO L125 PetriNetUnfolderBase]: For 250075/250093 co-relation queries the response was YES. [2024-06-27 17:50:10,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56529 conditions, 10288 events. 6223/10288 cut-off events. For 250075/250093 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 80167 event pairs, 2077 based on Foata normal form. 14/10286 useless extension candidates. Maximal degree in co-relation 56436. Up to 9273 conditions per place. [2024-06-27 17:50:10,853 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 54 changer transitions 0/263 dead transitions. [2024-06-27 17:50:10,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 263 transitions, 3834 flow [2024-06-27 17:50:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:50:10,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-27 17:50:10,854 INFO L175 Difference]: Start difference. First operand has 192 places, 237 transitions, 3118 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:50:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 263 transitions, 3834 flow [2024-06-27 17:50:11,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 263 transitions, 3579 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:11,598 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2982 flow [2024-06-27 17:50:11,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2982, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-27 17:50:11,599 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 144 predicate places. [2024-06-27 17:50:11,599 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2982 flow [2024-06-27 17:50:11,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:11,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:11,599 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 17:50:11,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:50:11,600 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:11,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 1 times [2024-06-27 17:50:11,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:11,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128952727] [2024-06-27 17:50:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:11,727 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 17:50:11,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128952727] [2024-06-27 17:50:11,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128952727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:11,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302764705] [2024-06-27 17:50:11,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:11,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:11,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:11,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:11,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2982 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 17:50:11,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:11,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:11,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:13,164 INFO L124 PetriNetUnfolderBase]: 6110/10131 cut-off events. [2024-06-27 17:50:13,164 INFO L125 PetriNetUnfolderBase]: For 265899/265941 co-relation queries the response was YES. [2024-06-27 17:50:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55982 conditions, 10131 events. 6110/10131 cut-off events. For 265899/265941 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 79550 event pairs, 2013 based on Foata normal form. 35/10117 useless extension candidates. Maximal degree in co-relation 55889. Up to 8994 conditions per place. [2024-06-27 17:50:13,273 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 184 selfloop transitions, 56 changer transitions 0/269 dead transitions. [2024-06-27 17:50:13,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 269 transitions, 3758 flow [2024-06-27 17:50:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 17:50:13,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-27 17:50:13,274 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2982 flow. Second operand 7 states and 202 transitions. [2024-06-27 17:50:13,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 269 transitions, 3758 flow [2024-06-27 17:50:14,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 269 transitions, 3613 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:14,136 INFO L231 Difference]: Finished difference. Result has 194 places, 239 transitions, 3004 flow [2024-06-27 17:50:14,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=194, PETRI_TRANSITIONS=239} [2024-06-27 17:50:14,137 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-27 17:50:14,137 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 239 transitions, 3004 flow [2024-06-27 17:50:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 17:50:14,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:14,137 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 17:50:14,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:50:14,137 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:14,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 2 times [2024-06-27 17:50:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:14,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529190016] [2024-06-27 17:50:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:14,254 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 17:50:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529190016] [2024-06-27 17:50:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529190016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:14,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364626134] [2024-06-27 17:50:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:14,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-27 17:50:14,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 239 transitions, 3004 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 17:50:14,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:14,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-27 17:50:14,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:15,760 INFO L124 PetriNetUnfolderBase]: 6247/10336 cut-off events. [2024-06-27 17:50:15,761 INFO L125 PetriNetUnfolderBase]: For 283699/283741 co-relation queries the response was YES. [2024-06-27 17:50:15,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57925 conditions, 10336 events. 6247/10336 cut-off events. For 283699/283741 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 81342 event pairs, 2003 based on Foata normal form. 35/10322 useless extension candidates. Maximal degree in co-relation 57831. Up to 8777 conditions per place. [2024-06-27 17:50:15,902 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 188 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-27 17:50:15,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 277 transitions, 3944 flow [2024-06-27 17:50:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 17:50:15,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-27 17:50:15,903 INFO L175 Difference]: Start difference. First operand has 194 places, 239 transitions, 3004 flow. Second operand 7 states and 206 transitions. [2024-06-27 17:50:15,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 277 transitions, 3944 flow [2024-06-27 17:50:17,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 277 transitions, 3805 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:17,004 INFO L231 Difference]: Finished difference. Result has 196 places, 242 transitions, 3064 flow [2024-06-27 17:50:17,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3064, PETRI_PLACES=196, PETRI_TRANSITIONS=242} [2024-06-27 17:50:17,004 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2024-06-27 17:50:17,004 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 242 transitions, 3064 flow [2024-06-27 17:50:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 17:50:17,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:17,005 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 17:50:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:50:17,005 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:17,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-27 17:50:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:17,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295092407] [2024-06-27 17:50:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:17,113 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 17:50:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295092407] [2024-06-27 17:50:17,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295092407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:17,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:17,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:17,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050697403] [2024-06-27 17:50:17,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:17,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:17,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:17,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 242 transitions, 3064 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:18,512 INFO L124 PetriNetUnfolderBase]: 6477/10650 cut-off events. [2024-06-27 17:50:18,512 INFO L125 PetriNetUnfolderBase]: For 288304/288307 co-relation queries the response was YES. [2024-06-27 17:50:18,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59877 conditions, 10650 events. 6477/10650 cut-off events. For 288304/288307 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 83072 event pairs, 2075 based on Foata normal form. 4/10644 useless extension candidates. Maximal degree in co-relation 59782. Up to 9675 conditions per place. [2024-06-27 17:50:18,638 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 237 selfloop transitions, 31 changer transitions 0/281 dead transitions. [2024-06-27 17:50:18,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 281 transitions, 3932 flow [2024-06-27 17:50:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 17:50:18,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-27 17:50:18,643 INFO L175 Difference]: Start difference. First operand has 196 places, 242 transitions, 3064 flow. Second operand 6 states and 174 transitions. [2024-06-27 17:50:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 281 transitions, 3932 flow [2024-06-27 17:50:19,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 281 transitions, 3828 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:19,724 INFO L231 Difference]: Finished difference. Result has 200 places, 247 transitions, 3155 flow [2024-06-27 17:50:19,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3155, PETRI_PLACES=200, PETRI_TRANSITIONS=247} [2024-06-27 17:50:19,724 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 151 predicate places. [2024-06-27 17:50:19,724 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 247 transitions, 3155 flow [2024-06-27 17:50:19,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:19,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:19,725 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 17:50:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:50:19,725 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:19,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-27 17:50:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999657271] [2024-06-27 17:50:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:19,819 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 17:50:19,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999657271] [2024-06-27 17:50:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999657271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:19,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:19,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932361213] [2024-06-27 17:50:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:19,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:19,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:19,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:19,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 247 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:19,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:19,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,189 INFO L124 PetriNetUnfolderBase]: 6472/10643 cut-off events. [2024-06-27 17:50:21,189 INFO L125 PetriNetUnfolderBase]: For 296031/296034 co-relation queries the response was YES. [2024-06-27 17:50:21,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60012 conditions, 10643 events. 6472/10643 cut-off events. For 296031/296034 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 83100 event pairs, 2121 based on Foata normal form. 4/10637 useless extension candidates. Maximal degree in co-relation 59914. Up to 9801 conditions per place. [2024-06-27 17:50:21,297 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 234 selfloop transitions, 26 changer transitions 0/273 dead transitions. [2024-06-27 17:50:21,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 273 transitions, 3767 flow [2024-06-27 17:50:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 17:50:21,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-27 17:50:21,298 INFO L175 Difference]: Start difference. First operand has 200 places, 247 transitions, 3155 flow. Second operand 6 states and 166 transitions. [2024-06-27 17:50:21,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 273 transitions, 3767 flow [2024-06-27 17:50:22,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 273 transitions, 3651 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:22,144 INFO L231 Difference]: Finished difference. Result has 204 places, 247 transitions, 3096 flow [2024-06-27 17:50:22,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3096, PETRI_PLACES=204, PETRI_TRANSITIONS=247} [2024-06-27 17:50:22,145 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 155 predicate places. [2024-06-27 17:50:22,145 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 247 transitions, 3096 flow [2024-06-27 17:50:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 17:50:22,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,145 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 17:50:22,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:50:22,145 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:22,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-27 17:50:22,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770226177] [2024-06-27 17:50:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:22,327 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 17:50:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770226177] [2024-06-27 17:50:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770226177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798458270] [2024-06-27 17:50:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:22,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-27 17:50:22,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 247 transitions, 3096 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 17:50:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-27 17:50:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,298 INFO L124 PetriNetUnfolderBase]: 8233/15403 cut-off events. [2024-06-27 17:50:24,298 INFO L125 PetriNetUnfolderBase]: For 323072/324237 co-relation queries the response was YES. [2024-06-27 17:50:24,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75153 conditions, 15403 events. 8233/15403 cut-off events. For 323072/324237 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 145489 event pairs, 2296 based on Foata normal form. 694/14904 useless extension candidates. Maximal degree in co-relation 75053. Up to 4306 conditions per place. [2024-06-27 17:50:24,495 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 157 selfloop transitions, 162 changer transitions 148/581 dead transitions. [2024-06-27 17:50:24,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 581 transitions, 7664 flow [2024-06-27 17:50:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-27 17:50:24,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-27 17:50:24,496 INFO L175 Difference]: Start difference. First operand has 204 places, 247 transitions, 3096 flow. Second operand 7 states and 223 transitions. [2024-06-27 17:50:24,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 581 transitions, 7664 flow [2024-06-27 17:50:25,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 581 transitions, 7513 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:25,776 INFO L231 Difference]: Finished difference. Result has 212 places, 348 transitions, 4963 flow [2024-06-27 17:50:25,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4963, PETRI_PLACES=212, PETRI_TRANSITIONS=348} [2024-06-27 17:50:25,776 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2024-06-27 17:50:25,777 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 348 transitions, 4963 flow [2024-06-27 17:50:25,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 17:50:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:25,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:50:25,777 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2054690222, now seen corresponding path program 1 times [2024-06-27 17:50:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038956980] [2024-06-27 17:50:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:25,961 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 17:50:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038956980] [2024-06-27 17:50:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038956980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:25,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:25,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684644315] [2024-06-27 17:50:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:26,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:26,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 348 transitions, 4963 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:26,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:26,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:28,846 INFO L124 PetriNetUnfolderBase]: 10001/17454 cut-off events. [2024-06-27 17:50:28,846 INFO L125 PetriNetUnfolderBase]: For 480385/480837 co-relation queries the response was YES. [2024-06-27 17:50:28,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103055 conditions, 17454 events. 10001/17454 cut-off events. For 480385/480837 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 151415 event pairs, 5006 based on Foata normal form. 345/17621 useless extension candidates. Maximal degree in co-relation 102949. Up to 15204 conditions per place. [2024-06-27 17:50:29,056 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 291 selfloop transitions, 28 changer transitions 66/399 dead transitions. [2024-06-27 17:50:29,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 399 transitions, 6008 flow [2024-06-27 17:50:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:50:29,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-27 17:50:29,057 INFO L175 Difference]: Start difference. First operand has 212 places, 348 transitions, 4963 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:50:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 399 transitions, 6008 flow [2024-06-27 17:50:31,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 399 transitions, 5994 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:31,348 INFO L231 Difference]: Finished difference. Result has 220 places, 294 transitions, 4267 flow [2024-06-27 17:50:31,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4267, PETRI_PLACES=220, PETRI_TRANSITIONS=294} [2024-06-27 17:50:31,349 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-27 17:50:31,349 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 294 transitions, 4267 flow [2024-06-27 17:50:31,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:31,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:50:31,350 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1226959430, now seen corresponding path program 2 times [2024-06-27 17:50:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519990276] [2024-06-27 17:50:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,489 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 17:50:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519990276] [2024-06-27 17:50:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519990276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318448106] [2024-06-27 17:50:31,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:31,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:31,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 294 transitions, 4267 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:31,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,367 INFO L124 PetriNetUnfolderBase]: 8675/15414 cut-off events. [2024-06-27 17:50:34,367 INFO L125 PetriNetUnfolderBase]: For 473679/474075 co-relation queries the response was YES. [2024-06-27 17:50:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92681 conditions, 15414 events. 8675/15414 cut-off events. For 473679/474075 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 133368 event pairs, 4572 based on Foata normal form. 324/15677 useless extension candidates. Maximal degree in co-relation 92571. Up to 13238 conditions per place. [2024-06-27 17:50:34,655 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 297 selfloop transitions, 27 changer transitions 0/338 dead transitions. [2024-06-27 17:50:34,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 5211 flow [2024-06-27 17:50:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 17:50:34,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 17:50:34,656 INFO L175 Difference]: Start difference. First operand has 220 places, 294 transitions, 4267 flow. Second operand 8 states and 217 transitions. [2024-06-27 17:50:34,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 5211 flow [2024-06-27 17:50:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 338 transitions, 5127 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:36,473 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 4273 flow [2024-06-27 17:50:36,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4273, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-27 17:50:36,474 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-27 17:50:36,474 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 4273 flow [2024-06-27 17:50:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:36,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:50:36,474 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:36,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1227285860, now seen corresponding path program 3 times [2024-06-27 17:50:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964658546] [2024-06-27 17:50:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,618 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 17:50:36,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964658546] [2024-06-27 17:50:36,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964658546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096013948] [2024-06-27 17:50:36,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:36,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:36,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 4273 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:36,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:36,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:39,500 INFO L124 PetriNetUnfolderBase]: 8812/15119 cut-off events. [2024-06-27 17:50:39,500 INFO L125 PetriNetUnfolderBase]: For 479909/480392 co-relation queries the response was YES. [2024-06-27 17:50:39,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92859 conditions, 15119 events. 8812/15119 cut-off events. For 479909/480392 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 126388 event pairs, 3298 based on Foata normal form. 369/15298 useless extension candidates. Maximal degree in co-relation 92747. Up to 13593 conditions per place. [2024-06-27 17:50:39,673 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 293 selfloop transitions, 24 changer transitions 0/331 dead transitions. [2024-06-27 17:50:39,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 331 transitions, 5061 flow [2024-06-27 17:50:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 17:50:39,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-06-27 17:50:39,674 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 4273 flow. Second operand 7 states and 191 transitions. [2024-06-27 17:50:39,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 331 transitions, 5061 flow [2024-06-27 17:50:41,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4958 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:41,680 INFO L231 Difference]: Finished difference. Result has 224 places, 296 transitions, 4223 flow [2024-06-27 17:50:41,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4223, PETRI_PLACES=224, PETRI_TRANSITIONS=296} [2024-06-27 17:50:41,681 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 175 predicate places. [2024-06-27 17:50:41,681 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 296 transitions, 4223 flow [2024-06-27 17:50:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:41,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:41,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:50:41,682 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:41,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1049800010, now seen corresponding path program 1 times [2024-06-27 17:50:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:41,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883150878] [2024-06-27 17:50:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,797 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 17:50:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883150878] [2024-06-27 17:50:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883150878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853339714] [2024-06-27 17:50:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:41,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:41,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 296 transitions, 4223 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:41,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:41,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:44,753 INFO L124 PetriNetUnfolderBase]: 9027/15395 cut-off events. [2024-06-27 17:50:44,753 INFO L125 PetriNetUnfolderBase]: For 497581/498035 co-relation queries the response was YES. [2024-06-27 17:50:44,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95580 conditions, 15395 events. 9027/15395 cut-off events. For 497581/498035 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 127710 event pairs, 3179 based on Foata normal form. 428/15682 useless extension candidates. Maximal degree in co-relation 95467. Up to 13356 conditions per place. [2024-06-27 17:50:44,958 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 121 changer transitions 0/358 dead transitions. [2024-06-27 17:50:44,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 358 transitions, 5577 flow [2024-06-27 17:50:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 288 transitions. [2024-06-27 17:50:44,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 17:50:44,960 INFO L175 Difference]: Start difference. First operand has 224 places, 296 transitions, 4223 flow. Second operand 10 states and 288 transitions. [2024-06-27 17:50:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 358 transitions, 5577 flow [2024-06-27 17:50:47,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 358 transitions, 5530 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:47,329 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 4590 flow [2024-06-27 17:50:47,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4590, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-27 17:50:47,330 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-27 17:50:47,330 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 4590 flow [2024-06-27 17:50:47,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:47,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:47,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:47,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:50:47,331 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:47,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1049920166, now seen corresponding path program 1 times [2024-06-27 17:50:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923307344] [2024-06-27 17:50:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:47,450 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 17:50:47,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923307344] [2024-06-27 17:50:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923307344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:47,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:47,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:47,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680033032] [2024-06-27 17:50:47,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:47,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:47,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:47,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 4590 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:47,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:47,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:47,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:50,398 INFO L124 PetriNetUnfolderBase]: 9079/15523 cut-off events. [2024-06-27 17:50:50,398 INFO L125 PetriNetUnfolderBase]: For 531731/532167 co-relation queries the response was YES. [2024-06-27 17:50:50,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100091 conditions, 15523 events. 9079/15523 cut-off events. For 531731/532167 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 129574 event pairs, 3258 based on Foata normal form. 395/15773 useless extension candidates. Maximal degree in co-relation 99977. Up to 13896 conditions per place. [2024-06-27 17:50:50,613 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 275 selfloop transitions, 58 changer transitions 0/347 dead transitions. [2024-06-27 17:50:50,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 347 transitions, 5468 flow [2024-06-27 17:50:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:50:50,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:50:50,614 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 4590 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:50:50,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 347 transitions, 5468 flow [2024-06-27 17:50:53,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 5260 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:53,153 INFO L231 Difference]: Finished difference. Result has 233 places, 314 transitions, 4640 flow [2024-06-27 17:50:53,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4640, PETRI_PLACES=233, PETRI_TRANSITIONS=314} [2024-06-27 17:50:53,154 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-27 17:50:53,155 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 314 transitions, 4640 flow [2024-06-27 17:50:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:53,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:53,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:53,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:50:53,155 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:53,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1227051686, now seen corresponding path program 2 times [2024-06-27 17:50:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:53,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948494851] [2024-06-27 17:50:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:53,273 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 17:50:53,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948494851] [2024-06-27 17:50:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948494851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:53,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:53,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:53,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034192598] [2024-06-27 17:50:53,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:53,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:53,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 314 transitions, 4640 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:53,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:53,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:53,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:56,326 INFO L124 PetriNetUnfolderBase]: 9207/15678 cut-off events. [2024-06-27 17:50:56,327 INFO L125 PetriNetUnfolderBase]: For 549224/549690 co-relation queries the response was YES. [2024-06-27 17:50:56,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101735 conditions, 15678 events. 9207/15678 cut-off events. For 549224/549690 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 130204 event pairs, 3192 based on Foata normal form. 426/15966 useless extension candidates. Maximal degree in co-relation 101618. Up to 13995 conditions per place. [2024-06-27 17:50:56,518 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 276 selfloop transitions, 76 changer transitions 0/366 dead transitions. [2024-06-27 17:50:56,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 366 transitions, 5940 flow [2024-06-27 17:50:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 17:50:56,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-27 17:50:56,519 INFO L175 Difference]: Start difference. First operand has 233 places, 314 transitions, 4640 flow. Second operand 9 states and 246 transitions. [2024-06-27 17:50:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 366 transitions, 5940 flow [2024-06-27 17:50:58,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 366 transitions, 5782 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:58,584 INFO L231 Difference]: Finished difference. Result has 238 places, 328 transitions, 4868 flow [2024-06-27 17:50:58,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4868, PETRI_PLACES=238, PETRI_TRANSITIONS=328} [2024-06-27 17:50:58,585 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 189 predicate places. [2024-06-27 17:50:58,585 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 328 transitions, 4868 flow [2024-06-27 17:50:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:58,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:50:58,586 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:58,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash 278622760, now seen corresponding path program 3 times [2024-06-27 17:50:58,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:58,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340931640] [2024-06-27 17:50:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,707 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 17:50:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340931640] [2024-06-27 17:50:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340931640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336715548] [2024-06-27 17:50:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:50:58,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 328 transitions, 4868 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:50:58,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:58,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:50:58,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:01,864 INFO L124 PetriNetUnfolderBase]: 9124/15580 cut-off events. [2024-06-27 17:51:01,864 INFO L125 PetriNetUnfolderBase]: For 559905/560342 co-relation queries the response was YES. [2024-06-27 17:51:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101429 conditions, 15580 events. 9124/15580 cut-off events. For 559905/560342 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 129842 event pairs, 3189 based on Foata normal form. 401/15848 useless extension candidates. Maximal degree in co-relation 101310. Up to 13857 conditions per place. [2024-06-27 17:51:02,045 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 269 selfloop transitions, 83 changer transitions 0/366 dead transitions. [2024-06-27 17:51:02,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 366 transitions, 6011 flow [2024-06-27 17:51:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 17:51:02,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:51:02,046 INFO L175 Difference]: Start difference. First operand has 238 places, 328 transitions, 4868 flow. Second operand 8 states and 220 transitions. [2024-06-27 17:51:02,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 366 transitions, 6011 flow [2024-06-27 17:51:04,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 366 transitions, 5961 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 17:51:04,484 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 5180 flow [2024-06-27 17:51:04,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5180, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-27 17:51:04,485 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-27 17:51:04,485 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 5180 flow [2024-06-27 17:51:04,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:51:04,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:04,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:04,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:51:04,486 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:04,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash 591133244, now seen corresponding path program 4 times [2024-06-27 17:51:04,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:04,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967642904] [2024-06-27 17:51:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:04,626 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 17:51:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967642904] [2024-06-27 17:51:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967642904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:04,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:04,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:51:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640300861] [2024-06-27 17:51:04,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:51:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:51:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:51:04,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-27 17:51:04,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 5180 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 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 17:51:04,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:04,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-27 17:51:04,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand