./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.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/safe031_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:33:53,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:33:53,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:33:53,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:33:53,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:33:54,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:33:54,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:33:54,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:33:54,011 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:33:54,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:33:54,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:33:54,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:33:54,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:33:54,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:33:54,016 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:33:54,016 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:33:54,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:33:54,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:33:54,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:33:54,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:33:54,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:33:54,017 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:33:54,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:33:54,018 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:33:54,018 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:33:54,018 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:33:54,018 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:33:54,019 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:33:54,019 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:33:54,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:33:54,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:33:54,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:33:54,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:33:54,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:33:54,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:33:54,022 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:33:54,022 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:33:54,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:33:54,022 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:33:54,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:33:54,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:33:54,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:33:54,217 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:33:54,220 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:33:54,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 21:33:54,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:33:54,348 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:33:54,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 21:33:55,391 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:33:55,654 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:33:55,657 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 21:33:55,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506f4914d/c6da1c169451433db10491b774c6b6bd/FLAGad6ee6d57 [2024-06-27 21:33:55,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506f4914d/c6da1c169451433db10491b774c6b6bd [2024-06-27 21:33:55,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:33:55,691 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:33:55,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:33:55,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:33:55,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:33:55,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:33:54" (1/2) ... [2024-06-27 21:33:55,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efef18f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:33:55, skipping insertion in model container [2024-06-27 21:33:55,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:33:54" (1/2) ... [2024-06-27 21:33:55,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a0f105b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:33:55, skipping insertion in model container [2024-06-27 21:33:55,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:33:55" (2/2) ... [2024-06-27 21:33:55,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efef18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:55, skipping insertion in model container [2024-06-27 21:33:55,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:33:55" (2/2) ... [2024-06-27 21:33:55,704 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:33:55,801 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:33:55,803 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:33:55,803 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:33:55,803 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 21:33:55,804 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:33:55,804 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-27 21:33:55,864 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:33:56,148 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:33:56,169 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:33:56,274 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:33:56,302 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:33:56,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56 WrapperNode [2024-06-27 21:33:56,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:33:56,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:33:56,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:33:56,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:33:56,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,328 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,362 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-27 21:33:56,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:33:56,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:33:56,363 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:33:56,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:33:56,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,388 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,406 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 21:33:56,416 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,416 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:33:56,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:33:56,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:33:56,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:33:56,429 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (1/1) ... [2024-06-27 21:33:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:33:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:33:56,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:33:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:33:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:33:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:33:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:33:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:33:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:33:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:33:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:33:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:33:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:33:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:33:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:33:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:33:56,505 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:33:56,600 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:33:56,602 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:33:56,838 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:33:56,838 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:33:56,996 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:33:56,996 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:33:56,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:33:56 BoogieIcfgContainer [2024-06-27 21:33:56,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:33:56,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:33:56,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:33:57,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:33:57,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:33:54" (1/4) ... [2024-06-27 21:33:57,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bf9d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:33:57, skipping insertion in model container [2024-06-27 21:33:57,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:33:55" (2/4) ... [2024-06-27 21:33:57,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bf9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:33:57, skipping insertion in model container [2024-06-27 21:33:57,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:33:56" (3/4) ... [2024-06-27 21:33:57,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567bf9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:33:57, skipping insertion in model container [2024-06-27 21:33:57,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:33:56" (4/4) ... [2024-06-27 21:33:57,005 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 21:33:57,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:33:57,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:33:57,018 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:33:57,068 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:33:57,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:33:57,132 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:33:57,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:33:57,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:33:57,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:33:57,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:33:57,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:33:57,151 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;@1c76464b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:33:57,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:33:57,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:33:57,157 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:33:57,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:33:57,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:57,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:33:57,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:57,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:57,163 INFO L85 PathProgramCache]: Analyzing trace with hash 362273232, now seen corresponding path program 1 times [2024-06-27 21:33:57,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:57,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185612125] [2024-06-27 21:33:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:57,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185612125] [2024-06-27 21:33:57,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185612125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:57,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:57,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:33:57,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961021544] [2024-06-27 21:33:57,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:33:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:33:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:33:57,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:33:57,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:57,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:57,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:33:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:58,158 INFO L124 PetriNetUnfolderBase]: 1359/2057 cut-off events. [2024-06-27 21:33:58,158 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:33:58,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4171 conditions, 2057 events. 1359/2057 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9805 event pairs, 941 based on Foata normal form. 1/2021 useless extension candidates. Maximal degree in co-relation 4159. Up to 2029 conditions per place. [2024-06-27 21:33:58,173 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 21:33:58,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-27 21:33:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:33:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:33:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-27 21:33:58,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 21:33:58,184 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-27 21:33:58,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-27 21:33:58,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:58,189 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:33:58,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:33:58,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:33:58,193 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:33:58,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:58,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:33:58,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:58,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 252269935, now seen corresponding path program 1 times [2024-06-27 21:33:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540019045] [2024-06-27 21:33:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:58,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540019045] [2024-06-27 21:33:58,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540019045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:58,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:58,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:33:58,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894151596] [2024-06-27 21:33:58,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:33:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:33:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:33:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:33:58,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:58,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:58,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:33:58,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:59,004 INFO L124 PetriNetUnfolderBase]: 1347/2039 cut-off events. [2024-06-27 21:33:59,004 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-27 21:33:59,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 2039 events. 1347/2039 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9652 event pairs, 715 based on Foata normal form. 6/2042 useless extension candidates. Maximal degree in co-relation 4668. Up to 1981 conditions per place. [2024-06-27 21:33:59,014 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 21:33:59,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2024-06-27 21:33:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:33:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:33:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 21:33:59,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 21:33:59,016 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-27 21:33:59,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2024-06-27 21:33:59,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:33:59,018 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 21:33:59,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:33:59,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 21:33:59,019 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 21:33:59,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:59,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:59,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:59,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:33:59,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:59,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1773666863, now seen corresponding path program 1 times [2024-06-27 21:33:59,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:59,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937407657] [2024-06-27 21:33:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:59,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:59,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:59,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937407657] [2024-06-27 21:33:59,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937407657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:59,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:59,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:33:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298420864] [2024-06-27 21:33:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:59,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:33:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:33:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:33:59,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:33:59,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:59,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:59,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:33:59,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:59,775 INFO L124 PetriNetUnfolderBase]: 1342/2032 cut-off events. [2024-06-27 21:33:59,775 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-27 21:33:59,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 2032 events. 1342/2032 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9646 event pairs, 822 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-27 21:33:59,815 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-27 21:33:59,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 270 flow [2024-06-27 21:33:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:33:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:33:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 21:33:59,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 21:33:59,820 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 96 transitions. [2024-06-27 21:33:59,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 270 flow [2024-06-27 21:33:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:33:59,824 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-06-27 21:33:59,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 21:33:59,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 21:33:59,825 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-06-27 21:33:59,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:59,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:59,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:59,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:33:59,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:59,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash 421798061, now seen corresponding path program 1 times [2024-06-27 21:33:59,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:59,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189248557] [2024-06-27 21:33:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:59,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:00,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189248557] [2024-06-27 21:34:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189248557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:00,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:34:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646224665] [2024-06-27 21:34:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:34:00,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:34:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:34:00,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 21:34:00,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:00,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:00,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 21:34:00,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:01,212 INFO L124 PetriNetUnfolderBase]: 1333/2017 cut-off events. [2024-06-27 21:34:01,212 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-27 21:34:01,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 2017 events. 1333/2017 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9587 event pairs, 467 based on Foata normal form. 6/2020 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-27 21:34:01,222 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 21:34:01,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 378 flow [2024-06-27 21:34:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 21:34:01,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-27 21:34:01,225 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 6 states and 137 transitions. [2024-06-27 21:34:01,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 378 flow [2024-06-27 21:34:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:01,229 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 205 flow [2024-06-27 21:34:01,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 21:34:01,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 21:34:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 205 flow [2024-06-27 21:34:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:34:01,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:01,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash 859840688, now seen corresponding path program 1 times [2024-06-27 21:34:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395322023] [2024-06-27 21:34:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:01,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395322023] [2024-06-27 21:34:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395322023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:01,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:01,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:01,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234101951] [2024-06-27 21:34:01,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:01,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:01,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:01,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:01,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:02,107 INFO L124 PetriNetUnfolderBase]: 1335/2020 cut-off events. [2024-06-27 21:34:02,108 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2024-06-27 21:34:02,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 2020 events. 1335/2020 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9533 event pairs, 569 based on Foata normal form. 3/2020 useless extension candidates. Maximal degree in co-relation 6151. Up to 1955 conditions per place. [2024-06-27 21:34:02,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-27 21:34:02,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 449 flow [2024-06-27 21:34:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:34:02,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 21:34:02,121 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 205 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:34:02,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 449 flow [2024-06-27 21:34:02,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 420 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:02,127 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 297 flow [2024-06-27 21:34:02,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-27 21:34:02,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 21:34:02,130 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 297 flow [2024-06-27 21:34:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:02,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:34:02,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:02,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash 601527408, now seen corresponding path program 1 times [2024-06-27 21:34:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385895733] [2024-06-27 21:34:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:02,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:02,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385895733] [2024-06-27 21:34:02,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385895733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:02,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:02,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158670604] [2024-06-27 21:34:02,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:02,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:02,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:02,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:02,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:02,992 INFO L124 PetriNetUnfolderBase]: 1357/2062 cut-off events. [2024-06-27 21:34:02,992 INFO L125 PetriNetUnfolderBase]: For 5026/5026 co-relation queries the response was YES. [2024-06-27 21:34:02,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2062 events. 1357/2062 cut-off events. For 5026/5026 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9771 event pairs, 556 based on Foata normal form. 4/2063 useless extension candidates. Maximal degree in co-relation 7066. Up to 1991 conditions per place. [2024-06-27 21:34:03,002 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-27 21:34:03,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 515 flow [2024-06-27 21:34:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:34:03,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:34:03,003 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:34:03,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 515 flow [2024-06-27 21:34:03,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 501 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 21:34:03,007 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 341 flow [2024-06-27 21:34:03,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 21:34:03,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-27 21:34:03,008 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 341 flow [2024-06-27 21:34:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:03,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:03,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:03,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:34:03,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:03,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 608193648, now seen corresponding path program 2 times [2024-06-27 21:34:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:03,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739673778] [2024-06-27 21:34:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739673778] [2024-06-27 21:34:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739673778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453581939] [2024-06-27 21:34:03,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:03,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:03,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:03,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:03,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:03,783 INFO L124 PetriNetUnfolderBase]: 1363/2071 cut-off events. [2024-06-27 21:34:03,783 INFO L125 PetriNetUnfolderBase]: For 6845/6845 co-relation queries the response was YES. [2024-06-27 21:34:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 2071 events. 1363/2071 cut-off events. For 6845/6845 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9823 event pairs, 563 based on Foata normal form. 4/2069 useless extension candidates. Maximal degree in co-relation 7631. Up to 1973 conditions per place. [2024-06-27 21:34:03,796 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 21:34:03,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 563 flow [2024-06-27 21:34:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:34:03,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:34:03,798 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 341 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:34:03,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 563 flow [2024-06-27 21:34:03,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 529 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:03,803 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-27 21:34:03,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 21:34:03,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 21:34:03,804 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-27 21:34:03,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:03,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:03,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:34:03,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:03,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 608202576, now seen corresponding path program 1 times [2024-06-27 21:34:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:03,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016445976] [2024-06-27 21:34:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:03,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:04,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016445976] [2024-06-27 21:34:04,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016445976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:04,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772135324] [2024-06-27 21:34:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:04,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:04,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:04,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:04,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:04,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:04,865 INFO L124 PetriNetUnfolderBase]: 1365/2079 cut-off events. [2024-06-27 21:34:04,866 INFO L125 PetriNetUnfolderBase]: For 8603/8603 co-relation queries the response was YES. [2024-06-27 21:34:04,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 2079 events. 1365/2079 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9942 event pairs, 533 based on Foata normal form. 3/2079 useless extension candidates. Maximal degree in co-relation 8107. Up to 1986 conditions per place. [2024-06-27 21:34:04,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-27 21:34:04,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 655 flow [2024-06-27 21:34:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:34:04,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 21:34:04,878 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:34:04,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 655 flow [2024-06-27 21:34:04,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 605 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:04,883 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 420 flow [2024-06-27 21:34:04,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 21:34:04,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 21:34:04,884 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 420 flow [2024-06-27 21:34:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:04,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:04,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:34:04,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:04,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1467481757, now seen corresponding path program 1 times [2024-06-27 21:34:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:04,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471772584] [2024-06-27 21:34:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:05,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:05,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471772584] [2024-06-27 21:34:05,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471772584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:05,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:05,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:05,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434304209] [2024-06-27 21:34:05,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:05,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:05,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:05,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:05,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:05,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:05,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:05,889 INFO L124 PetriNetUnfolderBase]: 1501/2281 cut-off events. [2024-06-27 21:34:05,889 INFO L125 PetriNetUnfolderBase]: For 10888/10888 co-relation queries the response was YES. [2024-06-27 21:34:05,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 2281 events. 1501/2281 cut-off events. For 10888/10888 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11088 event pairs, 524 based on Foata normal form. 10/2288 useless extension candidates. Maximal degree in co-relation 9385. Up to 2058 conditions per place. [2024-06-27 21:34:05,903 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 80 selfloop transitions, 28 changer transitions 0/113 dead transitions. [2024-06-27 21:34:05,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 874 flow [2024-06-27 21:34:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 21:34:05,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-27 21:34:05,907 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 420 flow. Second operand 7 states and 149 transitions. [2024-06-27 21:34:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 874 flow [2024-06-27 21:34:05,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 113 transitions, 815 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:05,914 INFO L231 Difference]: Finished difference. Result has 71 places, 84 transitions, 597 flow [2024-06-27 21:34:05,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=597, PETRI_PLACES=71, PETRI_TRANSITIONS=84} [2024-06-27 21:34:05,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-27 21:34:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 84 transitions, 597 flow [2024-06-27 21:34:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:05,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:05,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:05,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:34:05,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:05,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1674402107, now seen corresponding path program 2 times [2024-06-27 21:34:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4808094] [2024-06-27 21:34:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:06,450 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 21:34:06,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4808094] [2024-06-27 21:34:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4808094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:06,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:06,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:06,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390194113] [2024-06-27 21:34:06,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:06,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:06,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:06,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 597 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:06,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:06,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:06,978 INFO L124 PetriNetUnfolderBase]: 1725/2614 cut-off events. [2024-06-27 21:34:06,979 INFO L125 PetriNetUnfolderBase]: For 17217/17217 co-relation queries the response was YES. [2024-06-27 21:34:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12660 conditions, 2614 events. 1725/2614 cut-off events. For 17217/17217 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13059 event pairs, 550 based on Foata normal form. 10/2618 useless extension candidates. Maximal degree in co-relation 12629. Up to 2028 conditions per place. [2024-06-27 21:34:06,999 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 81 selfloop transitions, 44 changer transitions 0/130 dead transitions. [2024-06-27 21:34:06,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 1177 flow [2024-06-27 21:34:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 21:34:07,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-27 21:34:07,001 INFO L175 Difference]: Start difference. First operand has 71 places, 84 transitions, 597 flow. Second operand 7 states and 151 transitions. [2024-06-27 21:34:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 1177 flow [2024-06-27 21:34:07,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 1133 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 21:34:07,021 INFO L231 Difference]: Finished difference. Result has 79 places, 98 transitions, 841 flow [2024-06-27 21:34:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=79, PETRI_TRANSITIONS=98} [2024-06-27 21:34:07,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 21:34:07,023 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 98 transitions, 841 flow [2024-06-27 21:34:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:07,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:07,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:34:07,024 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:07,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1674135197, now seen corresponding path program 3 times [2024-06-27 21:34:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:07,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070217131] [2024-06-27 21:34:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070217131] [2024-06-27 21:34:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070217131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:07,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121168256] [2024-06-27 21:34:07,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:07,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:07,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:07,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 98 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:07,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:07,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:08,065 INFO L124 PetriNetUnfolderBase]: 1805/2753 cut-off events. [2024-06-27 21:34:08,065 INFO L125 PetriNetUnfolderBase]: For 22598/22598 co-relation queries the response was YES. [2024-06-27 21:34:08,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14730 conditions, 2753 events. 1805/2753 cut-off events. For 22598/22598 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13945 event pairs, 591 based on Foata normal form. 10/2757 useless extension candidates. Maximal degree in co-relation 14694. Up to 2082 conditions per place. [2024-06-27 21:34:08,086 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 83 selfloop transitions, 48 changer transitions 0/136 dead transitions. [2024-06-27 21:34:08,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1367 flow [2024-06-27 21:34:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 21:34:08,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-27 21:34:08,088 INFO L175 Difference]: Start difference. First operand has 79 places, 98 transitions, 841 flow. Second operand 7 states and 150 transitions. [2024-06-27 21:34:08,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1367 flow [2024-06-27 21:34:08,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1304 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:08,103 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 1050 flow [2024-06-27 21:34:08,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-06-27 21:34:08,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 21:34:08,104 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 1050 flow [2024-06-27 21:34:08,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:08,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:08,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:34:08,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:08,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1674412027, now seen corresponding path program 1 times [2024-06-27 21:34:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:08,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488452436] [2024-06-27 21:34:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:08,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:08,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488452436] [2024-06-27 21:34:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488452436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:08,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:08,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574272146] [2024-06-27 21:34:08,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:08,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:08,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:08,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 1050 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:08,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:08,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:08,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:09,366 INFO L124 PetriNetUnfolderBase]: 1808/2751 cut-off events. [2024-06-27 21:34:09,384 INFO L125 PetriNetUnfolderBase]: For 25358/25358 co-relation queries the response was YES. [2024-06-27 21:34:09,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 2751 events. 1808/2751 cut-off events. For 25358/25358 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13755 event pairs, 616 based on Foata normal form. 6/2754 useless extension candidates. Maximal degree in co-relation 15416. Up to 2581 conditions per place. [2024-06-27 21:34:09,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 24 changer transitions 0/137 dead transitions. [2024-06-27 21:34:09,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 137 transitions, 1472 flow [2024-06-27 21:34:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:34:09,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 21:34:09,402 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 1050 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:34:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 137 transitions, 1472 flow [2024-06-27 21:34:09,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 1403 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:09,421 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1093 flow [2024-06-27 21:34:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1093, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-27 21:34:09,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 21:34:09,422 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1093 flow [2024-06-27 21:34:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:09,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:09,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:09,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:34:09,423 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:09,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 887693882, now seen corresponding path program 1 times [2024-06-27 21:34:09,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:09,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270748594] [2024-06-27 21:34:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:09,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270748594] [2024-06-27 21:34:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270748594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:09,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:34:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749752677] [2024-06-27 21:34:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:34:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:34:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:34:09,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:09,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1093 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:09,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:09,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:09,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:10,234 INFO L124 PetriNetUnfolderBase]: 1805/2745 cut-off events. [2024-06-27 21:34:10,234 INFO L125 PetriNetUnfolderBase]: For 26861/26861 co-relation queries the response was YES. [2024-06-27 21:34:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15673 conditions, 2745 events. 1805/2745 cut-off events. For 26861/26861 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13722 event pairs, 642 based on Foata normal form. 1/2743 useless extension candidates. Maximal degree in co-relation 15631. Up to 2650 conditions per place. [2024-06-27 21:34:10,252 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2024-06-27 21:34:10,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1341 flow [2024-06-27 21:34:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:34:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:34:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 21:34:10,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 21:34:10,254 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1093 flow. Second operand 5 states and 91 transitions. [2024-06-27 21:34:10,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1341 flow [2024-06-27 21:34:10,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1247 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:10,275 INFO L231 Difference]: Finished difference. Result has 91 places, 111 transitions, 1021 flow [2024-06-27 21:34:10,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1021, PETRI_PLACES=91, PETRI_TRANSITIONS=111} [2024-06-27 21:34:10,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 21:34:10,277 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 111 transitions, 1021 flow [2024-06-27 21:34:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:10,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:10,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:10,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:34:10,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:10,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1757473009, now seen corresponding path program 1 times [2024-06-27 21:34:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615028232] [2024-06-27 21:34:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:10,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615028232] [2024-06-27 21:34:10,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615028232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:10,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:10,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701289962] [2024-06-27 21:34:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:10,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:11,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:11,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 111 transitions, 1021 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:11,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:11,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:11,465 INFO L124 PetriNetUnfolderBase]: 1800/2738 cut-off events. [2024-06-27 21:34:11,466 INFO L125 PetriNetUnfolderBase]: For 28790/28790 co-relation queries the response was YES. [2024-06-27 21:34:11,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15538 conditions, 2738 events. 1800/2738 cut-off events. For 28790/28790 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13725 event pairs, 624 based on Foata normal form. 2/2737 useless extension candidates. Maximal degree in co-relation 15495. Up to 2607 conditions per place. [2024-06-27 21:34:11,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 120 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-27 21:34:11,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 139 transitions, 1399 flow [2024-06-27 21:34:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:34:11,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 21:34:11,486 INFO L175 Difference]: Start difference. First operand has 91 places, 111 transitions, 1021 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:34:11,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 139 transitions, 1399 flow [2024-06-27 21:34:11,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1377 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:11,515 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1087 flow [2024-06-27 21:34:11,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-06-27 21:34:11,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-27 21:34:11,516 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1087 flow [2024-06-27 21:34:11,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:11,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:11,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:11,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:34:11,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:11,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1752704465, now seen corresponding path program 1 times [2024-06-27 21:34:11,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859706719] [2024-06-27 21:34:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:12,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:12,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859706719] [2024-06-27 21:34:12,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859706719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:12,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:12,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:12,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481012095] [2024-06-27 21:34:12,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:12,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:12,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:12,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:12,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:12,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:12,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:12,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:12,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:12,721 INFO L124 PetriNetUnfolderBase]: 1864/2829 cut-off events. [2024-06-27 21:34:12,721 INFO L125 PetriNetUnfolderBase]: For 33178/33178 co-relation queries the response was YES. [2024-06-27 21:34:12,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2829 events. 1864/2829 cut-off events. For 33178/33178 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14207 event pairs, 551 based on Foata normal form. 10/2836 useless extension candidates. Maximal degree in co-relation 16438. Up to 2524 conditions per place. [2024-06-27 21:34:12,741 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 115 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-27 21:34:12,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1641 flow [2024-06-27 21:34:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 21:34:12,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-27 21:34:12,743 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1087 flow. Second operand 8 states and 170 transitions. [2024-06-27 21:34:12,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1641 flow [2024-06-27 21:34:12,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1577 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:12,764 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 1184 flow [2024-06-27 21:34:12,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-27 21:34:12,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 21:34:12,766 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 1184 flow [2024-06-27 21:34:12,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:12,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:12,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:12,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:34:12,767 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:12,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 329991037, now seen corresponding path program 2 times [2024-06-27 21:34:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149530629] [2024-06-27 21:34:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149530629] [2024-06-27 21:34:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149530629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:13,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:13,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235272803] [2024-06-27 21:34:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:13,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:13,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 1184 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:13,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:13,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:13,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:14,156 INFO L124 PetriNetUnfolderBase]: 1928/2922 cut-off events. [2024-06-27 21:34:14,157 INFO L125 PetriNetUnfolderBase]: For 37938/37938 co-relation queries the response was YES. [2024-06-27 21:34:14,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18052 conditions, 2922 events. 1928/2922 cut-off events. For 37938/37938 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14772 event pairs, 527 based on Foata normal form. 10/2926 useless extension candidates. Maximal degree in co-relation 18008. Up to 2216 conditions per place. [2024-06-27 21:34:14,176 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 97 selfloop transitions, 57 changer transitions 0/159 dead transitions. [2024-06-27 21:34:14,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1776 flow [2024-06-27 21:34:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:34:14,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-27 21:34:14,181 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 1184 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:34:14,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1776 flow [2024-06-27 21:34:14,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 1661 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:14,208 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1288 flow [2024-06-27 21:34:14,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-27 21:34:14,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-27 21:34:14,210 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1288 flow [2024-06-27 21:34:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:14,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:14,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:34:14,211 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 330287707, now seen corresponding path program 3 times [2024-06-27 21:34:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396500535] [2024-06-27 21:34:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396500535] [2024-06-27 21:34:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396500535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:14,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:14,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540333186] [2024-06-27 21:34:14,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:14,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:14,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:14,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1288 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:14,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:14,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:15,477 INFO L124 PetriNetUnfolderBase]: 2040/3088 cut-off events. [2024-06-27 21:34:15,477 INFO L125 PetriNetUnfolderBase]: For 44869/44869 co-relation queries the response was YES. [2024-06-27 21:34:15,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20182 conditions, 3088 events. 2040/3088 cut-off events. For 44869/44869 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15704 event pairs, 527 based on Foata normal form. 5/3087 useless extension candidates. Maximal degree in co-relation 20137. Up to 2181 conditions per place. [2024-06-27 21:34:15,500 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 97 selfloop transitions, 76 changer transitions 0/178 dead transitions. [2024-06-27 21:34:15,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 178 transitions, 2118 flow [2024-06-27 21:34:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 21:34:15,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-27 21:34:15,501 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1288 flow. Second operand 9 states and 195 transitions. [2024-06-27 21:34:15,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 178 transitions, 2118 flow [2024-06-27 21:34:15,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 178 transitions, 1945 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:15,539 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1491 flow [2024-06-27 21:34:15,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-27 21:34:15,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-27 21:34:15,540 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1491 flow [2024-06-27 21:34:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:15,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:15,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:15,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:34:15,540 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:15,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash 358584879, now seen corresponding path program 4 times [2024-06-27 21:34:15,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:15,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134402664] [2024-06-27 21:34:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:15,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134402664] [2024-06-27 21:34:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134402664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:16,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:16,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933330423] [2024-06-27 21:34:16,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:16,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:16,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:16,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:16,949 INFO L124 PetriNetUnfolderBase]: 2056/3125 cut-off events. [2024-06-27 21:34:16,949 INFO L125 PetriNetUnfolderBase]: For 52039/52039 co-relation queries the response was YES. [2024-06-27 21:34:16,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21607 conditions, 3125 events. 2056/3125 cut-off events. For 52039/52039 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15982 event pairs, 553 based on Foata normal form. 10/3129 useless extension candidates. Maximal degree in co-relation 21560. Up to 2397 conditions per place. [2024-06-27 21:34:16,968 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 116 selfloop transitions, 54 changer transitions 0/175 dead transitions. [2024-06-27 21:34:16,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 2141 flow [2024-06-27 21:34:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 21:34:16,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-27 21:34:16,969 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1491 flow. Second operand 8 states and 171 transitions. [2024-06-27 21:34:16,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 2141 flow [2024-06-27 21:34:17,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 175 transitions, 2004 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:17,004 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1561 flow [2024-06-27 21:34:17,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1561, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-27 21:34:17,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 21:34:17,005 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1561 flow [2024-06-27 21:34:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:17,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:17,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:34:17,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:17,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1748707745, now seen corresponding path program 1 times [2024-06-27 21:34:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:17,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898306944] [2024-06-27 21:34:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898306944] [2024-06-27 21:34:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898306944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075106407] [2024-06-27 21:34:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:17,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:17,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:17,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1561 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:17,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:17,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:18,034 INFO L124 PetriNetUnfolderBase]: 2070/3135 cut-off events. [2024-06-27 21:34:18,034 INFO L125 PetriNetUnfolderBase]: For 55032/55032 co-relation queries the response was YES. [2024-06-27 21:34:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22338 conditions, 3135 events. 2070/3135 cut-off events. For 55032/55032 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15925 event pairs, 631 based on Foata normal form. 6/3132 useless extension candidates. Maximal degree in co-relation 22289. Up to 2934 conditions per place. [2024-06-27 21:34:18,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-27 21:34:18,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 164 transitions, 2105 flow [2024-06-27 21:34:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:34:18,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-27 21:34:18,073 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1561 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:34:18,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 164 transitions, 2105 flow [2024-06-27 21:34:18,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1922 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:18,113 INFO L231 Difference]: Finished difference. Result has 107 places, 150 transitions, 1584 flow [2024-06-27 21:34:18,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1584, PETRI_PLACES=107, PETRI_TRANSITIONS=150} [2024-06-27 21:34:18,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 21:34:18,114 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 150 transitions, 1584 flow [2024-06-27 21:34:18,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:18,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:18,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:18,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:34:18,114 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:18,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 947423710, now seen corresponding path program 1 times [2024-06-27 21:34:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936669310] [2024-06-27 21:34:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936669310] [2024-06-27 21:34:18,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936669310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:18,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:18,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:18,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724446674] [2024-06-27 21:34:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:18,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:18,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:18,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:18,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 150 transitions, 1584 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:18,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:18,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:19,463 INFO L124 PetriNetUnfolderBase]: 2169/3288 cut-off events. [2024-06-27 21:34:19,464 INFO L125 PetriNetUnfolderBase]: For 61358/61358 co-relation queries the response was YES. [2024-06-27 21:34:19,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23423 conditions, 3288 events. 2169/3288 cut-off events. For 61358/61358 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16780 event pairs, 621 based on Foata normal form. 6/3291 useless extension candidates. Maximal degree in co-relation 23372. Up to 3034 conditions per place. [2024-06-27 21:34:19,493 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 169 selfloop transitions, 44 changer transitions 0/218 dead transitions. [2024-06-27 21:34:19,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 218 transitions, 2704 flow [2024-06-27 21:34:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:34:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:34:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 21:34:19,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-27 21:34:19,496 INFO L175 Difference]: Start difference. First operand has 107 places, 150 transitions, 1584 flow. Second operand 10 states and 203 transitions. [2024-06-27 21:34:19,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 218 transitions, 2704 flow [2024-06-27 21:34:19,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 218 transitions, 2629 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:19,549 INFO L231 Difference]: Finished difference. Result has 118 places, 176 transitions, 2056 flow [2024-06-27 21:34:19,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2056, PETRI_PLACES=118, PETRI_TRANSITIONS=176} [2024-06-27 21:34:19,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-27 21:34:19,552 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 176 transitions, 2056 flow [2024-06-27 21:34:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:19,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:19,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:34:19,553 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1678400178, now seen corresponding path program 2 times [2024-06-27 21:34:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501857212] [2024-06-27 21:34:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:20,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501857212] [2024-06-27 21:34:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501857212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:20,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:20,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245286918] [2024-06-27 21:34:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:20,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:20,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 176 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:20,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:20,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:20,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:20,946 INFO L124 PetriNetUnfolderBase]: 2201/3346 cut-off events. [2024-06-27 21:34:20,946 INFO L125 PetriNetUnfolderBase]: For 69257/69257 co-relation queries the response was YES. [2024-06-27 21:34:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24899 conditions, 3346 events. 2201/3346 cut-off events. For 69257/69257 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17214 event pairs, 602 based on Foata normal form. 5/3348 useless extension candidates. Maximal degree in co-relation 24843. Up to 3050 conditions per place. [2024-06-27 21:34:20,972 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 170 selfloop transitions, 49 changer transitions 0/224 dead transitions. [2024-06-27 21:34:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 224 transitions, 3054 flow [2024-06-27 21:34:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 21:34:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-27 21:34:20,975 INFO L175 Difference]: Start difference. First operand has 118 places, 176 transitions, 2056 flow. Second operand 8 states and 170 transitions. [2024-06-27 21:34:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 224 transitions, 3054 flow [2024-06-27 21:34:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 224 transitions, 2837 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:21,035 INFO L231 Difference]: Finished difference. Result has 125 places, 191 transitions, 2325 flow [2024-06-27 21:34:21,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2325, PETRI_PLACES=125, PETRI_TRANSITIONS=191} [2024-06-27 21:34:21,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:34:21,036 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 191 transitions, 2325 flow [2024-06-27 21:34:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:21,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:21,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:34:21,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:21,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1500737788, now seen corresponding path program 1 times [2024-06-27 21:34:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:21,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308894395] [2024-06-27 21:34:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:21,855 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 21:34:21,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:21,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308894395] [2024-06-27 21:34:21,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308894395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:21,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:21,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142074483] [2024-06-27 21:34:21,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:21,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 191 transitions, 2325 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:22,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:22,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:22,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:22,780 INFO L124 PetriNetUnfolderBase]: 2301/3509 cut-off events. [2024-06-27 21:34:22,780 INFO L125 PetriNetUnfolderBase]: For 80537/80537 co-relation queries the response was YES. [2024-06-27 21:34:22,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 3509 events. 2301/3509 cut-off events. For 80537/80537 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18289 event pairs, 580 based on Foata normal form. 17/3523 useless extension candidates. Maximal degree in co-relation 26519. Up to 3142 conditions per place. [2024-06-27 21:34:22,810 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 212 selfloop transitions, 47 changer transitions 0/264 dead transitions. [2024-06-27 21:34:22,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 264 transitions, 3551 flow [2024-06-27 21:34:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 21:34:22,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-27 21:34:22,818 INFO L175 Difference]: Start difference. First operand has 125 places, 191 transitions, 2325 flow. Second operand 9 states and 192 transitions. [2024-06-27 21:34:22,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 264 transitions, 3551 flow [2024-06-27 21:34:22,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 264 transitions, 3373 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:22,891 INFO L231 Difference]: Finished difference. Result has 135 places, 223 transitions, 2793 flow [2024-06-27 21:34:22,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2793, PETRI_PLACES=135, PETRI_TRANSITIONS=223} [2024-06-27 21:34:22,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 21:34:22,891 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 223 transitions, 2793 flow [2024-06-27 21:34:22,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:22,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:22,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:22,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:34:22,892 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1427272503, now seen corresponding path program 1 times [2024-06-27 21:34:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977545149] [2024-06-27 21:34:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:23,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977545149] [2024-06-27 21:34:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977545149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:23,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:23,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047018166] [2024-06-27 21:34:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:23,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:23,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 223 transitions, 2793 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:23,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:23,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:23,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:24,003 INFO L124 PetriNetUnfolderBase]: 2308/3522 cut-off events. [2024-06-27 21:34:24,004 INFO L125 PetriNetUnfolderBase]: For 87776/87776 co-relation queries the response was YES. [2024-06-27 21:34:24,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 3522 events. 2308/3522 cut-off events. For 87776/87776 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18351 event pairs, 596 based on Foata normal form. 3/3522 useless extension candidates. Maximal degree in co-relation 27797. Up to 3265 conditions per place. [2024-06-27 21:34:24,085 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 44 changer transitions 0/245 dead transitions. [2024-06-27 21:34:24,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3486 flow [2024-06-27 21:34:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 21:34:24,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-27 21:34:24,086 INFO L175 Difference]: Start difference. First operand has 135 places, 223 transitions, 2793 flow. Second operand 6 states and 122 transitions. [2024-06-27 21:34:24,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3486 flow [2024-06-27 21:34:24,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 245 transitions, 3322 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-06-27 21:34:24,180 INFO L231 Difference]: Finished difference. Result has 140 places, 228 transitions, 2833 flow [2024-06-27 21:34:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2833, PETRI_PLACES=140, PETRI_TRANSITIONS=228} [2024-06-27 21:34:24,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-27 21:34:24,181 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 228 transitions, 2833 flow [2024-06-27 21:34:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:34:24,181 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:24,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1502745574, now seen corresponding path program 2 times [2024-06-27 21:34:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138952844] [2024-06-27 21:34:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:24,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138952844] [2024-06-27 21:34:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138952844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:24,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:24,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292638158] [2024-06-27 21:34:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:24,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:25,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:25,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 228 transitions, 2833 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:25,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:25,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:25,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:25,858 INFO L124 PetriNetUnfolderBase]: 2993/4634 cut-off events. [2024-06-27 21:34:25,859 INFO L125 PetriNetUnfolderBase]: For 136681/136681 co-relation queries the response was YES. [2024-06-27 21:34:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36780 conditions, 4634 events. 2993/4634 cut-off events. For 136681/136681 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25910 event pairs, 698 based on Foata normal form. 18/4646 useless extension candidates. Maximal degree in co-relation 36710. Up to 2353 conditions per place. [2024-06-27 21:34:25,899 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 192 selfloop transitions, 94 changer transitions 0/291 dead transitions. [2024-06-27 21:34:25,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 291 transitions, 4218 flow [2024-06-27 21:34:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 21:34:25,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-27 21:34:25,917 INFO L175 Difference]: Start difference. First operand has 140 places, 228 transitions, 2833 flow. Second operand 9 states and 203 transitions. [2024-06-27 21:34:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 291 transitions, 4218 flow [2024-06-27 21:34:26,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 291 transitions, 4108 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:26,034 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 3139 flow [2024-06-27 21:34:26,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3139, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-27 21:34:26,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 21:34:26,034 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 3139 flow [2024-06-27 21:34:26,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:26,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:26,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:34:26,035 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1503072004, now seen corresponding path program 3 times [2024-06-27 21:34:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691845906] [2024-06-27 21:34:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691845906] [2024-06-27 21:34:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691845906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:26,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:26,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920385750] [2024-06-27 21:34:26,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:26,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:26,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:26,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 3139 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:27,848 INFO L124 PetriNetUnfolderBase]: 3393/5290 cut-off events. [2024-06-27 21:34:27,848 INFO L125 PetriNetUnfolderBase]: For 188454/188454 co-relation queries the response was YES. [2024-06-27 21:34:27,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43122 conditions, 5290 events. 3393/5290 cut-off events. For 188454/188454 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30466 event pairs, 821 based on Foata normal form. 92/5376 useless extension candidates. Maximal degree in co-relation 43050. Up to 3670 conditions per place. [2024-06-27 21:34:27,894 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 192 selfloop transitions, 94 changer transitions 0/291 dead transitions. [2024-06-27 21:34:27,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 291 transitions, 4319 flow [2024-06-27 21:34:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:34:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:34:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 21:34:27,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-27 21:34:27,896 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 3139 flow. Second operand 10 states and 219 transitions. [2024-06-27 21:34:27,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 291 transitions, 4319 flow [2024-06-27 21:34:28,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 291 transitions, 4160 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:28,050 INFO L231 Difference]: Finished difference. Result has 152 places, 238 transitions, 3280 flow [2024-06-27 21:34:28,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3280, PETRI_PLACES=152, PETRI_TRANSITIONS=238} [2024-06-27 21:34:28,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 21:34:28,051 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 238 transitions, 3280 flow [2024-06-27 21:34:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:28,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:28,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:28,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:34:28,052 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:28,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1768769284, now seen corresponding path program 4 times [2024-06-27 21:34:28,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:28,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157940949] [2024-06-27 21:34:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157940949] [2024-06-27 21:34:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157940949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:28,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:28,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279110800] [2024-06-27 21:34:28,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:28,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:28,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 238 transitions, 3280 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:28,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:28,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:28,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:30,004 INFO L124 PetriNetUnfolderBase]: 3755/5899 cut-off events. [2024-06-27 21:34:30,005 INFO L125 PetriNetUnfolderBase]: For 211281/211281 co-relation queries the response was YES. [2024-06-27 21:34:30,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48017 conditions, 5899 events. 3755/5899 cut-off events. For 211281/211281 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35011 event pairs, 916 based on Foata normal form. 92/5985 useless extension candidates. Maximal degree in co-relation 47943. Up to 4489 conditions per place. [2024-06-27 21:34:30,055 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 221 selfloop transitions, 62 changer transitions 0/288 dead transitions. [2024-06-27 21:34:30,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4394 flow [2024-06-27 21:34:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 21:34:30,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-27 21:34:30,057 INFO L175 Difference]: Start difference. First operand has 152 places, 238 transitions, 3280 flow. Second operand 9 states and 196 transitions. [2024-06-27 21:34:30,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4394 flow [2024-06-27 21:34:30,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 288 transitions, 4180 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:30,244 INFO L231 Difference]: Finished difference. Result has 153 places, 241 transitions, 3306 flow [2024-06-27 21:34:30,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3066, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3306, PETRI_PLACES=153, PETRI_TRANSITIONS=241} [2024-06-27 21:34:30,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 21:34:30,245 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 241 transitions, 3306 flow [2024-06-27 21:34:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:30,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:30,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:34:30,246 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:30,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1624648423, now seen corresponding path program 2 times [2024-06-27 21:34:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202349514] [2024-06-27 21:34:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:30,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202349514] [2024-06-27 21:34:30,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202349514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:30,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237176156] [2024-06-27 21:34:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:30,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:30,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 241 transitions, 3306 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:30,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:30,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:31,808 INFO L124 PetriNetUnfolderBase]: 3726/5836 cut-off events. [2024-06-27 21:34:31,808 INFO L125 PetriNetUnfolderBase]: For 186490/186490 co-relation queries the response was YES. [2024-06-27 21:34:31,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47315 conditions, 5836 events. 3726/5836 cut-off events. For 186490/186490 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34415 event pairs, 1136 based on Foata normal form. 7/5833 useless extension candidates. Maximal degree in co-relation 47240. Up to 5584 conditions per place. [2024-06-27 21:34:31,868 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 41 changer transitions 0/251 dead transitions. [2024-06-27 21:34:31,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 251 transitions, 3842 flow [2024-06-27 21:34:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 21:34:31,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:34:31,869 INFO L175 Difference]: Start difference. First operand has 153 places, 241 transitions, 3306 flow. Second operand 6 states and 114 transitions. [2024-06-27 21:34:31,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 251 transitions, 3842 flow [2024-06-27 21:34:32,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 251 transitions, 3590 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:32,089 INFO L231 Difference]: Finished difference. Result has 152 places, 241 transitions, 3156 flow [2024-06-27 21:34:32,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3156, PETRI_PLACES=152, PETRI_TRANSITIONS=241} [2024-06-27 21:34:32,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 21:34:32,090 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 241 transitions, 3156 flow [2024-06-27 21:34:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:32,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:32,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:32,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:34:32,091 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:32,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1433945687, now seen corresponding path program 1 times [2024-06-27 21:34:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:32,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972988712] [2024-06-27 21:34:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:32,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:32,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972988712] [2024-06-27 21:34:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972988712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:32,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474091549] [2024-06-27 21:34:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:32,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:32,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:32,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 241 transitions, 3156 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:32,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:32,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:33,427 INFO L124 PetriNetUnfolderBase]: 3728/5848 cut-off events. [2024-06-27 21:34:33,427 INFO L125 PetriNetUnfolderBase]: For 179994/179994 co-relation queries the response was YES. [2024-06-27 21:34:33,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46391 conditions, 5848 events. 3728/5848 cut-off events. For 179994/179994 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34722 event pairs, 1171 based on Foata normal form. 2/5847 useless extension candidates. Maximal degree in co-relation 46315. Up to 5650 conditions per place. [2024-06-27 21:34:33,478 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 19 changer transitions 0/257 dead transitions. [2024-06-27 21:34:33,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 257 transitions, 3784 flow [2024-06-27 21:34:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:34:33,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:34:33,479 INFO L175 Difference]: Start difference. First operand has 152 places, 241 transitions, 3156 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:34:33,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 257 transitions, 3784 flow [2024-06-27 21:34:33,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 3658 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:33,639 INFO L231 Difference]: Finished difference. Result has 152 places, 244 transitions, 3108 flow [2024-06-27 21:34:33,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3108, PETRI_PLACES=152, PETRI_TRANSITIONS=244} [2024-06-27 21:34:33,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 21:34:33,640 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 244 transitions, 3108 flow [2024-06-27 21:34:33,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:33,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:33,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:33,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:34:33,640 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:33,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1624641479, now seen corresponding path program 2 times [2024-06-27 21:34:33,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:33,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198143679] [2024-06-27 21:34:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198143679] [2024-06-27 21:34:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198143679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126774183] [2024-06-27 21:34:34,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:34,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:34,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 244 transitions, 3108 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:34,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:34,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:34,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:34,919 INFO L124 PetriNetUnfolderBase]: 3689/5781 cut-off events. [2024-06-27 21:34:34,919 INFO L125 PetriNetUnfolderBase]: For 185480/185480 co-relation queries the response was YES. [2024-06-27 21:34:34,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46136 conditions, 5781 events. 3689/5781 cut-off events. For 185480/185480 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34190 event pairs, 1163 based on Foata normal form. 1/5779 useless extension candidates. Maximal degree in co-relation 46059. Up to 5618 conditions per place. [2024-06-27 21:34:34,971 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 237 selfloop transitions, 11 changer transitions 0/253 dead transitions. [2024-06-27 21:34:34,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 253 transitions, 3630 flow [2024-06-27 21:34:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:34:34,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:34:34,973 INFO L175 Difference]: Start difference. First operand has 152 places, 244 transitions, 3108 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:34:34,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 253 transitions, 3630 flow [2024-06-27 21:34:35,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 253 transitions, 3601 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:35,157 INFO L231 Difference]: Finished difference. Result has 155 places, 244 transitions, 3107 flow [2024-06-27 21:34:35,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3079, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3107, PETRI_PLACES=155, PETRI_TRANSITIONS=244} [2024-06-27 21:34:35,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 21:34:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 244 transitions, 3107 flow [2024-06-27 21:34:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:34:35,159 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:35,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -214904896, now seen corresponding path program 1 times [2024-06-27 21:34:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485439257] [2024-06-27 21:34:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:35,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485439257] [2024-06-27 21:34:35,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485439257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:35,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:35,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:35,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572389400] [2024-06-27 21:34:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:35,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:35,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:35,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:35,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 244 transitions, 3107 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:35,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:35,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:35,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:36,759 INFO L124 PetriNetUnfolderBase]: 3706/5809 cut-off events. [2024-06-27 21:34:36,760 INFO L125 PetriNetUnfolderBase]: For 194832/194832 co-relation queries the response was YES. [2024-06-27 21:34:36,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46613 conditions, 5809 events. 3706/5809 cut-off events. For 194832/194832 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34216 event pairs, 1004 based on Foata normal form. 4/5810 useless extension candidates. Maximal degree in co-relation 46535. Up to 5557 conditions per place. [2024-06-27 21:34:36,813 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 17 changer transitions 0/276 dead transitions. [2024-06-27 21:34:36,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 276 transitions, 3797 flow [2024-06-27 21:34:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:34:36,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:34:36,815 INFO L175 Difference]: Start difference. First operand has 155 places, 244 transitions, 3107 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:34:36,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 276 transitions, 3797 flow [2024-06-27 21:34:37,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 276 transitions, 3750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:37,012 INFO L231 Difference]: Finished difference. Result has 157 places, 246 transitions, 3163 flow [2024-06-27 21:34:37,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3163, PETRI_PLACES=157, PETRI_TRANSITIONS=246} [2024-06-27 21:34:37,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:34:37,013 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 246 transitions, 3163 flow [2024-06-27 21:34:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:37,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:37,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:37,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:34:37,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:37,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2019320708, now seen corresponding path program 2 times [2024-06-27 21:34:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939708965] [2024-06-27 21:34:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:37,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:37,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939708965] [2024-06-27 21:34:37,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939708965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:37,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643978289] [2024-06-27 21:34:37,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:37,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:37,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:37,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 246 transitions, 3163 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:37,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:37,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:37,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:38,759 INFO L124 PetriNetUnfolderBase]: 3723/5836 cut-off events. [2024-06-27 21:34:38,759 INFO L125 PetriNetUnfolderBase]: For 205513/205513 co-relation queries the response was YES. [2024-06-27 21:34:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47316 conditions, 5836 events. 3723/5836 cut-off events. For 205513/205513 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34611 event pairs, 1119 based on Foata normal form. 4/5837 useless extension candidates. Maximal degree in co-relation 47237. Up to 5602 conditions per place. [2024-06-27 21:34:38,806 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-27 21:34:38,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 277 transitions, 3857 flow [2024-06-27 21:34:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:34:38,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:34:38,807 INFO L175 Difference]: Start difference. First operand has 157 places, 246 transitions, 3163 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:34:38,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 277 transitions, 3857 flow [2024-06-27 21:34:38,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 277 transitions, 3772 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:38,982 INFO L231 Difference]: Finished difference. Result has 159 places, 248 transitions, 3192 flow [2024-06-27 21:34:38,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3192, PETRI_PLACES=159, PETRI_TRANSITIONS=248} [2024-06-27 21:34:38,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-27 21:34:38,983 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 248 transitions, 3192 flow [2024-06-27 21:34:38,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:38,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:38,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:38,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:34:38,983 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:38,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1009372914, now seen corresponding path program 1 times [2024-06-27 21:34:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:38,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922717094] [2024-06-27 21:34:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922717094] [2024-06-27 21:34:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922717094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:39,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172229913] [2024-06-27 21:34:39,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:40,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:40,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 248 transitions, 3192 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:40,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:40,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:41,079 INFO L124 PetriNetUnfolderBase]: 3755/5886 cut-off events. [2024-06-27 21:34:41,080 INFO L125 PetriNetUnfolderBase]: For 218272/218272 co-relation queries the response was YES. [2024-06-27 21:34:41,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48093 conditions, 5886 events. 3755/5886 cut-off events. For 218272/218272 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 34850 event pairs, 1094 based on Foata normal form. 5/5888 useless extension candidates. Maximal degree in co-relation 48013. Up to 5523 conditions per place. [2024-06-27 21:34:41,139 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 221 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-06-27 21:34:41,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 289 transitions, 4086 flow [2024-06-27 21:34:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 21:34:41,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-27 21:34:41,148 INFO L175 Difference]: Start difference. First operand has 159 places, 248 transitions, 3192 flow. Second operand 9 states and 188 transitions. [2024-06-27 21:34:41,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 289 transitions, 4086 flow [2024-06-27 21:34:41,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 289 transitions, 3992 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:41,367 INFO L231 Difference]: Finished difference. Result has 162 places, 253 transitions, 3386 flow [2024-06-27 21:34:41,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3386, PETRI_PLACES=162, PETRI_TRANSITIONS=253} [2024-06-27 21:34:41,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 21:34:41,368 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 253 transitions, 3386 flow [2024-06-27 21:34:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:41,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:41,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:41,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:34:41,374 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:41,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 771724634, now seen corresponding path program 3 times [2024-06-27 21:34:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:41,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719002525] [2024-06-27 21:34:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:42,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:42,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719002525] [2024-06-27 21:34:42,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719002525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:42,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:42,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922120808] [2024-06-27 21:34:42,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:42,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:42,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 253 transitions, 3386 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:42,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:42,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:42,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:43,163 INFO L124 PetriNetUnfolderBase]: 3772/5921 cut-off events. [2024-06-27 21:34:43,163 INFO L125 PetriNetUnfolderBase]: For 231084/231084 co-relation queries the response was YES. [2024-06-27 21:34:43,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49621 conditions, 5921 events. 3772/5921 cut-off events. For 231084/231084 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35135 event pairs, 1108 based on Foata normal form. 4/5922 useless extension candidates. Maximal degree in co-relation 49540. Up to 5700 conditions per place. [2024-06-27 21:34:43,224 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 263 selfloop transitions, 16 changer transitions 0/284 dead transitions. [2024-06-27 21:34:43,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 284 transitions, 4113 flow [2024-06-27 21:34:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:34:43,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:34:43,226 INFO L175 Difference]: Start difference. First operand has 162 places, 253 transitions, 3386 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:34:43,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 284 transitions, 4113 flow [2024-06-27 21:34:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 284 transitions, 3871 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:43,548 INFO L231 Difference]: Finished difference. Result has 164 places, 257 transitions, 3280 flow [2024-06-27 21:34:43,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=164, PETRI_TRANSITIONS=257} [2024-06-27 21:34:43,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 21:34:43,548 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 257 transitions, 3280 flow [2024-06-27 21:34:43,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:43,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:43,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:43,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:34:43,549 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:43,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1033046448, now seen corresponding path program 2 times [2024-06-27 21:34:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:43,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052642047] [2024-06-27 21:34:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:44,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052642047] [2024-06-27 21:34:44,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052642047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:44,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:44,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:44,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854788422] [2024-06-27 21:34:44,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:44,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:44,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 257 transitions, 3280 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:44,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:44,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:44,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:45,524 INFO L124 PetriNetUnfolderBase]: 3828/6013 cut-off events. [2024-06-27 21:34:45,524 INFO L125 PetriNetUnfolderBase]: For 244486/244486 co-relation queries the response was YES. [2024-06-27 21:34:45,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50488 conditions, 6013 events. 3828/6013 cut-off events. For 244486/244486 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35789 event pairs, 1067 based on Foata normal form. 5/6015 useless extension candidates. Maximal degree in co-relation 50405. Up to 5369 conditions per place. [2024-06-27 21:34:45,597 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 180 selfloop transitions, 123 changer transitions 0/308 dead transitions. [2024-06-27 21:34:45,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 308 transitions, 4566 flow [2024-06-27 21:34:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 21:34:45,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-27 21:34:45,598 INFO L175 Difference]: Start difference. First operand has 164 places, 257 transitions, 3280 flow. Second operand 9 states and 194 transitions. [2024-06-27 21:34:45,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 308 transitions, 4566 flow [2024-06-27 21:34:45,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 308 transitions, 4463 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:45,822 INFO L231 Difference]: Finished difference. Result has 170 places, 271 transitions, 3870 flow [2024-06-27 21:34:45,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3870, PETRI_PLACES=170, PETRI_TRANSITIONS=271} [2024-06-27 21:34:45,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-27 21:34:45,822 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 271 transitions, 3870 flow [2024-06-27 21:34:45,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:45,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:45,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:34:45,823 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:45,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash 996048302, now seen corresponding path program 4 times [2024-06-27 21:34:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674664836] [2024-06-27 21:34:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674664836] [2024-06-27 21:34:46,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674664836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:46,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697490884] [2024-06-27 21:34:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:46,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:46,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:46,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:46,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 271 transitions, 3870 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:46,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:46,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:46,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:47,924 INFO L124 PetriNetUnfolderBase]: 3820/6004 cut-off events. [2024-06-27 21:34:47,924 INFO L125 PetriNetUnfolderBase]: For 261889/261889 co-relation queries the response was YES. [2024-06-27 21:34:47,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52375 conditions, 6004 events. 3820/6004 cut-off events. For 261889/261889 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 35775 event pairs, 1071 based on Foata normal form. 4/6002 useless extension candidates. Maximal degree in co-relation 52289. Up to 5740 conditions per place. [2024-06-27 21:34:47,988 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 23 changer transitions 0/300 dead transitions. [2024-06-27 21:34:47,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 300 transitions, 4644 flow [2024-06-27 21:34:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:34:47,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 21:34:47,989 INFO L175 Difference]: Start difference. First operand has 170 places, 271 transitions, 3870 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:34:47,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 300 transitions, 4644 flow [2024-06-27 21:34:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 300 transitions, 4422 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:48,269 INFO L231 Difference]: Finished difference. Result has 176 places, 276 transitions, 3823 flow [2024-06-27 21:34:48,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3823, PETRI_PLACES=176, PETRI_TRANSITIONS=276} [2024-06-27 21:34:48,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 21:34:48,270 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 276 transitions, 3823 flow [2024-06-27 21:34:48,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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 21:34:48,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:48,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:48,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:34:48,270 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:48,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:48,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1002719502, now seen corresponding path program 3 times [2024-06-27 21:34:48,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:48,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881168903] [2024-06-27 21:34:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881168903] [2024-06-27 21:34:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881168903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:49,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:49,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901728888] [2024-06-27 21:34:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:49,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:49,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 276 transitions, 3823 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:49,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:49,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:49,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:50,420 INFO L124 PetriNetUnfolderBase]: 3916/6178 cut-off events. [2024-06-27 21:34:50,420 INFO L125 PetriNetUnfolderBase]: For 281764/281764 co-relation queries the response was YES. [2024-06-27 21:34:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54029 conditions, 6178 events. 3916/6178 cut-off events. For 281764/281764 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37217 event pairs, 859 based on Foata normal form. 5/6173 useless extension candidates. Maximal degree in co-relation 53940. Up to 5035 conditions per place. [2024-06-27 21:34:50,490 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 212 selfloop transitions, 119 changer transitions 0/336 dead transitions. [2024-06-27 21:34:50,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 336 transitions, 5491 flow [2024-06-27 21:34:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 21:34:50,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-27 21:34:50,493 INFO L175 Difference]: Start difference. First operand has 176 places, 276 transitions, 3823 flow. Second operand 9 states and 194 transitions. [2024-06-27 21:34:50,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 336 transitions, 5491 flow [2024-06-27 21:34:50,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 336 transitions, 5362 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:50,815 INFO L231 Difference]: Finished difference. Result has 183 places, 296 transitions, 4560 flow [2024-06-27 21:34:50,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4560, PETRI_PLACES=183, PETRI_TRANSITIONS=296} [2024-06-27 21:34:50,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-27 21:34:50,815 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 296 transitions, 4560 flow [2024-06-27 21:34:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:50,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:50,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:50,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:34:50,816 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:50,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 649400590, now seen corresponding path program 4 times [2024-06-27 21:34:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:50,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466280035] [2024-06-27 21:34:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466280035] [2024-06-27 21:34:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466280035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612634767] [2024-06-27 21:34:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:51,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:51,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 296 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:51,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:51,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:51,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:53,042 INFO L124 PetriNetUnfolderBase]: 3960/6239 cut-off events. [2024-06-27 21:34:53,042 INFO L125 PetriNetUnfolderBase]: For 307644/307644 co-relation queries the response was YES. [2024-06-27 21:34:53,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57478 conditions, 6239 events. 3960/6239 cut-off events. For 307644/307644 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37737 event pairs, 908 based on Foata normal form. 5/6238 useless extension candidates. Maximal degree in co-relation 57385. Up to 5117 conditions per place. [2024-06-27 21:34:53,116 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 248 selfloop transitions, 111 changer transitions 0/364 dead transitions. [2024-06-27 21:34:53,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 364 transitions, 6169 flow [2024-06-27 21:34:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-27 21:34:53,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144124168514412 [2024-06-27 21:34:53,117 INFO L175 Difference]: Start difference. First operand has 183 places, 296 transitions, 4560 flow. Second operand 11 states and 232 transitions. [2024-06-27 21:34:53,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 364 transitions, 6169 flow [2024-06-27 21:34:53,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 364 transitions, 5837 flow, removed 149 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:53,556 INFO L231 Difference]: Finished difference. Result has 194 places, 315 transitions, 4950 flow [2024-06-27 21:34:53,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4950, PETRI_PLACES=194, PETRI_TRANSITIONS=315} [2024-06-27 21:34:53,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 21:34:53,557 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 315 transitions, 4950 flow [2024-06-27 21:34:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:53,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:53,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:53,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:34:53,557 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:53,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -132706316, now seen corresponding path program 1 times [2024-06-27 21:34:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:53,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499313517] [2024-06-27 21:34:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:53,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499313517] [2024-06-27 21:34:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499313517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:54,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:54,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:54,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718820083] [2024-06-27 21:34:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:54,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:54,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:54,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:54,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 315 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:54,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:54,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:54,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:55,203 INFO L124 PetriNetUnfolderBase]: 4052/6390 cut-off events. [2024-06-27 21:34:55,203 INFO L125 PetriNetUnfolderBase]: For 327357/327357 co-relation queries the response was YES. [2024-06-27 21:34:55,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60272 conditions, 6390 events. 4052/6390 cut-off events. For 327357/327357 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38808 event pairs, 943 based on Foata normal form. 12/6396 useless extension candidates. Maximal degree in co-relation 60175. Up to 5487 conditions per place. [2024-06-27 21:34:55,275 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 277 selfloop transitions, 70 changer transitions 0/352 dead transitions. [2024-06-27 21:34:55,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 352 transitions, 6244 flow [2024-06-27 21:34:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 21:34:55,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-27 21:34:55,277 INFO L175 Difference]: Start difference. First operand has 194 places, 315 transitions, 4950 flow. Second operand 7 states and 142 transitions. [2024-06-27 21:34:55,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 352 transitions, 6244 flow [2024-06-27 21:34:55,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 352 transitions, 5968 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:55,726 INFO L231 Difference]: Finished difference. Result has 197 places, 328 transitions, 5123 flow [2024-06-27 21:34:55,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5123, PETRI_PLACES=197, PETRI_TRANSITIONS=328} [2024-06-27 21:34:55,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 21:34:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 328 transitions, 5123 flow [2024-06-27 21:34:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:55,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:55,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:34:55,727 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:55,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1102608034, now seen corresponding path program 2 times [2024-06-27 21:34:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999171945] [2024-06-27 21:34:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999171945] [2024-06-27 21:34:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999171945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:56,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:56,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325946127] [2024-06-27 21:34:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:56,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:56,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:56,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:56,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 328 transitions, 5123 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:56,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:56,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:56,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:57,412 INFO L124 PetriNetUnfolderBase]: 4082/6427 cut-off events. [2024-06-27 21:34:57,412 INFO L125 PetriNetUnfolderBase]: For 331195/331195 co-relation queries the response was YES. [2024-06-27 21:34:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61097 conditions, 6427 events. 4082/6427 cut-off events. For 331195/331195 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39054 event pairs, 1094 based on Foata normal form. 6/6427 useless extension candidates. Maximal degree in co-relation 60997. Up to 6131 conditions per place. [2024-06-27 21:34:57,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 23 changer transitions 0/344 dead transitions. [2024-06-27 21:34:57,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 344 transitions, 5950 flow [2024-06-27 21:34:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:34:57,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:34:57,484 INFO L175 Difference]: Start difference. First operand has 197 places, 328 transitions, 5123 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:34:57,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 344 transitions, 5950 flow [2024-06-27 21:34:57,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 344 transitions, 5856 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:57,806 INFO L231 Difference]: Finished difference. Result has 201 places, 332 transitions, 5177 flow [2024-06-27 21:34:57,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5177, PETRI_PLACES=201, PETRI_TRANSITIONS=332} [2024-06-27 21:34:57,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 21:34:57,807 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 332 transitions, 5177 flow [2024-06-27 21:34:57,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:57,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:57,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:57,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:34:57,808 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:57,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1679776036, now seen corresponding path program 3 times [2024-06-27 21:34:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443604164] [2024-06-27 21:34:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:57,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:58,221 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 21:34:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443604164] [2024-06-27 21:34:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443604164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:58,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:58,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511666821] [2024-06-27 21:34:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:58,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:58,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:34:58,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 332 transitions, 5177 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:58,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:58,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:34:58,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:59,450 INFO L124 PetriNetUnfolderBase]: 4072/6407 cut-off events. [2024-06-27 21:34:59,450 INFO L125 PetriNetUnfolderBase]: For 338123/338123 co-relation queries the response was YES. [2024-06-27 21:34:59,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60604 conditions, 6407 events. 4072/6407 cut-off events. For 338123/338123 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38932 event pairs, 1079 based on Foata normal form. 6/6407 useless extension candidates. Maximal degree in co-relation 60503. Up to 6012 conditions per place. [2024-06-27 21:34:59,520 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 308 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-27 21:34:59,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 348 transitions, 6058 flow [2024-06-27 21:34:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:34:59,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 21:34:59,522 INFO L175 Difference]: Start difference. First operand has 201 places, 332 transitions, 5177 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:34:59,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 348 transitions, 6058 flow [2024-06-27 21:34:59,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 348 transitions, 5982 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:59,920 INFO L231 Difference]: Finished difference. Result has 203 places, 332 transitions, 5181 flow [2024-06-27 21:34:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5181, PETRI_PLACES=203, PETRI_TRANSITIONS=332} [2024-06-27 21:34:59,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 21:34:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 332 transitions, 5181 flow [2024-06-27 21:34:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:34:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:34:59,922 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:59,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1680022114, now seen corresponding path program 1 times [2024-06-27 21:34:59,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:59,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993264575] [2024-06-27 21:34:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:59,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993264575] [2024-06-27 21:35:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993264575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:00,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:00,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673849415] [2024-06-27 21:35:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:00,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:00,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:00,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 332 transitions, 5181 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:00,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:00,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:00,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:01,833 INFO L124 PetriNetUnfolderBase]: 4111/6485 cut-off events. [2024-06-27 21:35:01,833 INFO L125 PetriNetUnfolderBase]: For 354416/354416 co-relation queries the response was YES. [2024-06-27 21:35:01,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61210 conditions, 6485 events. 4111/6485 cut-off events. For 354416/354416 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39522 event pairs, 1085 based on Foata normal form. 14/6489 useless extension candidates. Maximal degree in co-relation 61110. Up to 6077 conditions per place. [2024-06-27 21:35:01,906 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 299 selfloop transitions, 46 changer transitions 0/350 dead transitions. [2024-06-27 21:35:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 350 transitions, 6033 flow [2024-06-27 21:35:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:35:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:35:01,908 INFO L175 Difference]: Start difference. First operand has 203 places, 332 transitions, 5181 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:35:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 350 transitions, 6033 flow [2024-06-27 21:35:02,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 350 transitions, 5748 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-27 21:35:02,341 INFO L231 Difference]: Finished difference. Result has 200 places, 334 transitions, 5036 flow [2024-06-27 21:35:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5036, PETRI_PLACES=200, PETRI_TRANSITIONS=334} [2024-06-27 21:35:02,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 21:35:02,342 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 334 transitions, 5036 flow [2024-06-27 21:35:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:02,342 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 21:35:02,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:35:02,343 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:02,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash 960414239, now seen corresponding path program 1 times [2024-06-27 21:35:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:02,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773093100] [2024-06-27 21:35:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:02,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773093100] [2024-06-27 21:35:03,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773093100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:03,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:03,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923153727] [2024-06-27 21:35:03,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:03,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:03,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 334 transitions, 5036 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:03,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:03,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:03,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:04,533 INFO L124 PetriNetUnfolderBase]: 4259/6733 cut-off events. [2024-06-27 21:35:04,534 INFO L125 PetriNetUnfolderBase]: For 364600/364600 co-relation queries the response was YES. [2024-06-27 21:35:04,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62952 conditions, 6733 events. 4259/6733 cut-off events. For 364600/364600 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41315 event pairs, 1092 based on Foata normal form. 6/6736 useless extension candidates. Maximal degree in co-relation 62855. Up to 6200 conditions per place. [2024-06-27 21:35:04,617 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 330 selfloop transitions, 71 changer transitions 0/406 dead transitions. [2024-06-27 21:35:04,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 406 transitions, 6689 flow [2024-06-27 21:35:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 21:35:04,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-27 21:35:04,619 INFO L175 Difference]: Start difference. First operand has 200 places, 334 transitions, 5036 flow. Second operand 10 states and 204 transitions. [2024-06-27 21:35:04,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 406 transitions, 6689 flow [2024-06-27 21:35:05,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 406 transitions, 6551 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:05,140 INFO L231 Difference]: Finished difference. Result has 209 places, 362 transitions, 5669 flow [2024-06-27 21:35:05,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5669, PETRI_PLACES=209, PETRI_TRANSITIONS=362} [2024-06-27 21:35:05,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-27 21:35:05,141 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 362 transitions, 5669 flow [2024-06-27 21:35:05,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:05,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:05,141 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 21:35:05,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:35:05,142 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:05,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1314507489, now seen corresponding path program 2 times [2024-06-27 21:35:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:05,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059733446] [2024-06-27 21:35:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:05,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059733446] [2024-06-27 21:35:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059733446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:05,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:05,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751046634] [2024-06-27 21:35:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:05,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:05,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 362 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:05,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:05,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:05,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:07,257 INFO L124 PetriNetUnfolderBase]: 4410/6957 cut-off events. [2024-06-27 21:35:07,258 INFO L125 PetriNetUnfolderBase]: For 408233/408233 co-relation queries the response was YES. [2024-06-27 21:35:07,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66534 conditions, 6957 events. 4410/6957 cut-off events. For 408233/408233 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 42646 event pairs, 951 based on Foata normal form. 14/6968 useless extension candidates. Maximal degree in co-relation 66432. Up to 6194 conditions per place. [2024-06-27 21:35:07,343 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 338 selfloop transitions, 70 changer transitions 0/413 dead transitions. [2024-06-27 21:35:07,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 413 transitions, 7125 flow [2024-06-27 21:35:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 21:35:07,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-27 21:35:07,345 INFO L175 Difference]: Start difference. First operand has 209 places, 362 transitions, 5669 flow. Second operand 9 states and 190 transitions. [2024-06-27 21:35:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 413 transitions, 7125 flow [2024-06-27 21:35:07,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 413 transitions, 6902 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:07,944 INFO L231 Difference]: Finished difference. Result has 217 places, 371 transitions, 5920 flow [2024-06-27 21:35:07,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5920, PETRI_PLACES=217, PETRI_TRANSITIONS=371} [2024-06-27 21:35:07,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 21:35:07,945 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 371 transitions, 5920 flow [2024-06-27 21:35:07,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:07,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:07,945 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 21:35:07,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:35:07,945 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:07,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1225941729, now seen corresponding path program 3 times [2024-06-27 21:35:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400502767] [2024-06-27 21:35:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:08,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400502767] [2024-06-27 21:35:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400502767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:08,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:08,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131152273] [2024-06-27 21:35:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:08,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:08,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:08,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 371 transitions, 5920 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:08,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:08,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:08,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:10,289 INFO L124 PetriNetUnfolderBase]: 4656/7327 cut-off events. [2024-06-27 21:35:10,289 INFO L125 PetriNetUnfolderBase]: For 464162/464162 co-relation queries the response was YES. [2024-06-27 21:35:10,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72019 conditions, 7327 events. 4656/7327 cut-off events. For 464162/464162 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45404 event pairs, 1152 based on Foata normal form. 16/7340 useless extension candidates. Maximal degree in co-relation 71914. Up to 6513 conditions per place. [2024-06-27 21:35:10,373 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 348 selfloop transitions, 70 changer transitions 0/423 dead transitions. [2024-06-27 21:35:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 423 transitions, 7546 flow [2024-06-27 21:35:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 21:35:10,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-27 21:35:10,374 INFO L175 Difference]: Start difference. First operand has 217 places, 371 transitions, 5920 flow. Second operand 9 states and 195 transitions. [2024-06-27 21:35:10,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 423 transitions, 7546 flow [2024-06-27 21:35:11,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 423 transitions, 7349 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:11,112 INFO L231 Difference]: Finished difference. Result has 223 places, 377 transitions, 6117 flow [2024-06-27 21:35:11,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6117, PETRI_PLACES=223, PETRI_TRANSITIONS=377} [2024-06-27 21:35:11,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 21:35:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 377 transitions, 6117 flow [2024-06-27 21:35:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:11,114 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 21:35:11,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:35:11,114 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1225793859, now seen corresponding path program 4 times [2024-06-27 21:35:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164479662] [2024-06-27 21:35:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164479662] [2024-06-27 21:35:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164479662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:11,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305315541] [2024-06-27 21:35:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:11,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:11,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:11,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 377 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:11,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:11,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:11,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:13,586 INFO L124 PetriNetUnfolderBase]: 4649/7326 cut-off events. [2024-06-27 21:35:13,587 INFO L125 PetriNetUnfolderBase]: For 456613/456613 co-relation queries the response was YES. [2024-06-27 21:35:13,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71843 conditions, 7326 events. 4649/7326 cut-off events. For 456613/456613 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45478 event pairs, 1200 based on Foata normal form. 16/7339 useless extension candidates. Maximal degree in co-relation 71735. Up to 6763 conditions per place. [2024-06-27 21:35:13,664 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 342 selfloop transitions, 72 changer transitions 0/419 dead transitions. [2024-06-27 21:35:13,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 419 transitions, 7365 flow [2024-06-27 21:35:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 21:35:13,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-27 21:35:13,673 INFO L175 Difference]: Start difference. First operand has 223 places, 377 transitions, 6117 flow. Second operand 9 states and 190 transitions. [2024-06-27 21:35:13,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 419 transitions, 7365 flow [2024-06-27 21:35:14,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 419 transitions, 7161 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:14,299 INFO L231 Difference]: Finished difference. Result has 227 places, 380 transitions, 6201 flow [2024-06-27 21:35:14,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6201, PETRI_PLACES=227, PETRI_TRANSITIONS=380} [2024-06-27 21:35:14,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 21:35:14,300 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 380 transitions, 6201 flow [2024-06-27 21:35:14,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:14,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:14,300 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 21:35:14,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:35:14,300 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:14,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1225787907, now seen corresponding path program 1 times [2024-06-27 21:35:14,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:14,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434188431] [2024-06-27 21:35:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434188431] [2024-06-27 21:35:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434188431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570913500] [2024-06-27 21:35:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:15,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:15,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 380 transitions, 6201 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:15,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:15,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:15,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:17,217 INFO L124 PetriNetUnfolderBase]: 4884/7722 cut-off events. [2024-06-27 21:35:17,217 INFO L125 PetriNetUnfolderBase]: For 524441/524441 co-relation queries the response was YES. [2024-06-27 21:35:17,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75241 conditions, 7722 events. 4884/7722 cut-off events. For 524441/524441 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48619 event pairs, 1296 based on Foata normal form. 58/7777 useless extension candidates. Maximal degree in co-relation 75131. Up to 6673 conditions per place. [2024-06-27 21:35:17,314 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 341 selfloop transitions, 82 changer transitions 0/428 dead transitions. [2024-06-27 21:35:17,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 428 transitions, 7499 flow [2024-06-27 21:35:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 21:35:17,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-27 21:35:17,315 INFO L175 Difference]: Start difference. First operand has 227 places, 380 transitions, 6201 flow. Second operand 10 states and 212 transitions. [2024-06-27 21:35:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 428 transitions, 7499 flow [2024-06-27 21:35:18,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 428 transitions, 7320 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:18,020 INFO L231 Difference]: Finished difference. Result has 231 places, 382 transitions, 6316 flow [2024-06-27 21:35:18,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6316, PETRI_PLACES=231, PETRI_TRANSITIONS=382} [2024-06-27 21:35:18,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-27 21:35:18,021 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 382 transitions, 6316 flow [2024-06-27 21:35:18,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:18,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:18,021 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 21:35:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:35:18,021 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:18,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash -629308505, now seen corresponding path program 5 times [2024-06-27 21:35:18,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:18,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050148475] [2024-06-27 21:35:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050148475] [2024-06-27 21:35:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050148475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:18,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:18,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523036730] [2024-06-27 21:35:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:18,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:18,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 382 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:18,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:18,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:18,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:20,571 INFO L124 PetriNetUnfolderBase]: 4993/7886 cut-off events. [2024-06-27 21:35:20,572 INFO L125 PetriNetUnfolderBase]: For 507149/507149 co-relation queries the response was YES. [2024-06-27 21:35:20,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77308 conditions, 7886 events. 4993/7886 cut-off events. For 507149/507149 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49777 event pairs, 1264 based on Foata normal form. 16/7899 useless extension candidates. Maximal degree in co-relation 77197. Up to 7347 conditions per place. [2024-06-27 21:35:20,681 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 367 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2024-06-27 21:35:20,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 430 transitions, 7709 flow [2024-06-27 21:35:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 21:35:20,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:35:20,682 INFO L175 Difference]: Start difference. First operand has 231 places, 382 transitions, 6316 flow. Second operand 9 states and 189 transitions. [2024-06-27 21:35:20,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 430 transitions, 7709 flow [2024-06-27 21:35:21,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 430 transitions, 7489 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:21,526 INFO L231 Difference]: Finished difference. Result has 233 places, 391 transitions, 6471 flow [2024-06-27 21:35:21,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=233, PETRI_TRANSITIONS=391} [2024-06-27 21:35:21,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 21:35:21,527 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 391 transitions, 6471 flow [2024-06-27 21:35:21,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:21,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:21,527 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 21:35:21,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:35:21,528 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:21,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -828610295, now seen corresponding path program 6 times [2024-06-27 21:35:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485726087] [2024-06-27 21:35:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485726087] [2024-06-27 21:35:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485726087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:22,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:22,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:22,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879682409] [2024-06-27 21:35:22,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:22,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:22,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:22,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 391 transitions, 6471 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:22,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:22,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:22,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:24,099 INFO L124 PetriNetUnfolderBase]: 5032/7956 cut-off events. [2024-06-27 21:35:24,099 INFO L125 PetriNetUnfolderBase]: For 510845/510845 co-relation queries the response was YES. [2024-06-27 21:35:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77728 conditions, 7956 events. 5032/7956 cut-off events. For 510845/510845 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50332 event pairs, 1317 based on Foata normal form. 16/7969 useless extension candidates. Maximal degree in co-relation 77615. Up to 7412 conditions per place. [2024-06-27 21:35:24,199 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 374 selfloop transitions, 55 changer transitions 0/434 dead transitions. [2024-06-27 21:35:24,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 434 transitions, 7863 flow [2024-06-27 21:35:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 21:35:24,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:35:24,200 INFO L175 Difference]: Start difference. First operand has 233 places, 391 transitions, 6471 flow. Second operand 9 states and 189 transitions. [2024-06-27 21:35:24,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 434 transitions, 7863 flow [2024-06-27 21:35:25,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 434 transitions, 7672 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:25,065 INFO L231 Difference]: Finished difference. Result has 237 places, 395 transitions, 6558 flow [2024-06-27 21:35:25,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6558, PETRI_PLACES=237, PETRI_TRANSITIONS=395} [2024-06-27 21:35:25,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 21:35:25,066 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 395 transitions, 6558 flow [2024-06-27 21:35:25,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:25,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:25,066 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 21:35:25,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:35:25,066 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:25,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1846338829, now seen corresponding path program 7 times [2024-06-27 21:35:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:25,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419034265] [2024-06-27 21:35:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:25,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:25,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419034265] [2024-06-27 21:35:25,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419034265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:25,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:25,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251980770] [2024-06-27 21:35:25,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:25,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:25,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 395 transitions, 6558 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:25,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:25,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:25,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:27,658 INFO L124 PetriNetUnfolderBase]: 5194/8206 cut-off events. [2024-06-27 21:35:27,658 INFO L125 PetriNetUnfolderBase]: For 551927/551927 co-relation queries the response was YES. [2024-06-27 21:35:27,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81354 conditions, 8206 events. 5194/8206 cut-off events. For 551927/551927 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52182 event pairs, 1325 based on Foata normal form. 16/8219 useless extension candidates. Maximal degree in co-relation 81239. Up to 7340 conditions per place. [2024-06-27 21:35:27,758 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 381 selfloop transitions, 59 changer transitions 0/445 dead transitions. [2024-06-27 21:35:27,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 445 transitions, 8250 flow [2024-06-27 21:35:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-27 21:35:27,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-27 21:35:27,760 INFO L175 Difference]: Start difference. First operand has 237 places, 395 transitions, 6558 flow. Second operand 9 states and 193 transitions. [2024-06-27 21:35:27,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 445 transitions, 8250 flow [2024-06-27 21:35:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 445 transitions, 8090 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:28,662 INFO L231 Difference]: Finished difference. Result has 243 places, 401 transitions, 6798 flow [2024-06-27 21:35:28,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6798, PETRI_PLACES=243, PETRI_TRANSITIONS=401} [2024-06-27 21:35:28,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 21:35:28,663 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 401 transitions, 6798 flow [2024-06-27 21:35:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:28,663 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 21:35:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:35:28,664 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:28,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash -621950903, now seen corresponding path program 2 times [2024-06-27 21:35:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:28,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696876070] [2024-06-27 21:35:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:29,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:29,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696876070] [2024-06-27 21:35:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696876070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:29,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:29,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269137521] [2024-06-27 21:35:29,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:29,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:29,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 401 transitions, 6798 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:29,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:29,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:29,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:31,649 INFO L124 PetriNetUnfolderBase]: 5429/8613 cut-off events. [2024-06-27 21:35:31,650 INFO L125 PetriNetUnfolderBase]: For 647740/647740 co-relation queries the response was YES. [2024-06-27 21:35:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85683 conditions, 8613 events. 5429/8613 cut-off events. For 647740/647740 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 55455 event pairs, 1373 based on Foata normal form. 58/8668 useless extension candidates. Maximal degree in co-relation 85566. Up to 7396 conditions per place. [2024-06-27 21:35:31,760 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 294 selfloop transitions, 151 changer transitions 0/450 dead transitions. [2024-06-27 21:35:31,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 450 transitions, 8364 flow [2024-06-27 21:35:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 21:35:31,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-27 21:35:31,762 INFO L175 Difference]: Start difference. First operand has 243 places, 401 transitions, 6798 flow. Second operand 10 states and 217 transitions. [2024-06-27 21:35:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 450 transitions, 8364 flow [2024-06-27 21:35:32,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 450 transitions, 8188 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:32,533 INFO L231 Difference]: Finished difference. Result has 249 places, 403 transitions, 7062 flow [2024-06-27 21:35:32,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7062, PETRI_PLACES=249, PETRI_TRANSITIONS=403} [2024-06-27 21:35:32,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 21:35:32,534 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 403 transitions, 7062 flow [2024-06-27 21:35:32,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:32,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:32,534 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 21:35:32,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:35:32,534 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:32,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1846185007, now seen corresponding path program 3 times [2024-06-27 21:35:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016608121] [2024-06-27 21:35:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:32,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:33,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016608121] [2024-06-27 21:35:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016608121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:33,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:33,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517085512] [2024-06-27 21:35:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:33,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:33,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:33,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:33,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 403 transitions, 7062 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:33,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:33,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:35,631 INFO L124 PetriNetUnfolderBase]: 5696/9064 cut-off events. [2024-06-27 21:35:35,631 INFO L125 PetriNetUnfolderBase]: For 682615/682615 co-relation queries the response was YES. [2024-06-27 21:35:35,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89918 conditions, 9064 events. 5696/9064 cut-off events. For 682615/682615 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59141 event pairs, 1518 based on Foata normal form. 58/9119 useless extension candidates. Maximal degree in co-relation 89799. Up to 8178 conditions per place. [2024-06-27 21:35:35,745 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 392 selfloop transitions, 59 changer transitions 0/456 dead transitions. [2024-06-27 21:35:35,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 456 transitions, 8608 flow [2024-06-27 21:35:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 21:35:35,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:35:35,747 INFO L175 Difference]: Start difference. First operand has 249 places, 403 transitions, 7062 flow. Second operand 10 states and 210 transitions. [2024-06-27 21:35:35,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 456 transitions, 8608 flow [2024-06-27 21:35:36,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 456 transitions, 8220 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:36,731 INFO L231 Difference]: Finished difference. Result has 252 places, 410 transitions, 7007 flow [2024-06-27 21:35:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7007, PETRI_PLACES=252, PETRI_TRANSITIONS=410} [2024-06-27 21:35:36,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 21:35:36,732 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 410 transitions, 7007 flow [2024-06-27 21:35:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:36,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:36,732 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 21:35:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:35:36,732 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:36,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash -907581285, now seen corresponding path program 4 times [2024-06-27 21:35:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:36,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67984907] [2024-06-27 21:35:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67984907] [2024-06-27 21:35:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67984907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:37,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:37,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950728618] [2024-06-27 21:35:37,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:37,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:37,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 410 transitions, 7007 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:37,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:37,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:37,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:39,825 INFO L124 PetriNetUnfolderBase]: 5893/9402 cut-off events. [2024-06-27 21:35:39,825 INFO L125 PetriNetUnfolderBase]: For 695550/695550 co-relation queries the response was YES. [2024-06-27 21:35:39,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91731 conditions, 9402 events. 5893/9402 cut-off events. For 695550/695550 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 62021 event pairs, 1618 based on Foata normal form. 58/9457 useless extension candidates. Maximal degree in co-relation 91610. Up to 8521 conditions per place. [2024-06-27 21:35:39,953 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 390 selfloop transitions, 62 changer transitions 0/457 dead transitions. [2024-06-27 21:35:39,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 457 transitions, 8380 flow [2024-06-27 21:35:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 21:35:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 21:35:39,954 INFO L175 Difference]: Start difference. First operand has 252 places, 410 transitions, 7007 flow. Second operand 10 states and 210 transitions. [2024-06-27 21:35:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 457 transitions, 8380 flow [2024-06-27 21:35:41,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 457 transitions, 8205 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:41,213 INFO L231 Difference]: Finished difference. Result has 256 places, 412 transitions, 7080 flow [2024-06-27 21:35:41,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6832, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7080, PETRI_PLACES=256, PETRI_TRANSITIONS=412} [2024-06-27 21:35:41,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:35:41,214 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 412 transitions, 7080 flow [2024-06-27 21:35:41,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:41,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:41,214 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 21:35:41,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:35:41,214 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:41,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1639264657, now seen corresponding path program 5 times [2024-06-27 21:35:41,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:41,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636246368] [2024-06-27 21:35:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636246368] [2024-06-27 21:35:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636246368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:42,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870553614] [2024-06-27 21:35:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:42,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:42,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:42,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 412 transitions, 7080 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:42,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:42,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:42,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:44,891 INFO L124 PetriNetUnfolderBase]: 6480/10449 cut-off events. [2024-06-27 21:35:44,891 INFO L125 PetriNetUnfolderBase]: For 810150/810150 co-relation queries the response was YES. [2024-06-27 21:35:45,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101591 conditions, 10449 events. 6480/10449 cut-off events. For 810150/810150 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 71171 event pairs, 1723 based on Foata normal form. 54/10500 useless extension candidates. Maximal degree in co-relation 101469. Up to 7363 conditions per place. [2024-06-27 21:35:45,059 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 375 selfloop transitions, 92 changer transitions 0/472 dead transitions. [2024-06-27 21:35:45,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 472 transitions, 8925 flow [2024-06-27 21:35:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:35:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:35:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 21:35:45,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-27 21:35:45,066 INFO L175 Difference]: Start difference. First operand has 256 places, 412 transitions, 7080 flow. Second operand 10 states and 219 transitions. [2024-06-27 21:35:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 472 transitions, 8925 flow [2024-06-27 21:35:46,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 472 transitions, 8732 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:46,350 INFO L231 Difference]: Finished difference. Result has 260 places, 417 transitions, 7360 flow [2024-06-27 21:35:46,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6887, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7360, PETRI_PLACES=260, PETRI_TRANSITIONS=417} [2024-06-27 21:35:46,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-27 21:35:46,351 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 417 transitions, 7360 flow [2024-06-27 21:35:46,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:46,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:46,351 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 21:35:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:35:46,351 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:46,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash 127064954, now seen corresponding path program 1 times [2024-06-27 21:35:46,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:46,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309846505] [2024-06-27 21:35:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309846505] [2024-06-27 21:35:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309846505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:46,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165114707] [2024-06-27 21:35:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:47,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:47,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 417 transitions, 7360 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:35:47,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:47,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:47,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:49,098 INFO L124 PetriNetUnfolderBase]: 6468/10406 cut-off events. [2024-06-27 21:35:49,098 INFO L125 PetriNetUnfolderBase]: For 756722/756722 co-relation queries the response was YES. [2024-06-27 21:35:49,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101799 conditions, 10406 events. 6468/10406 cut-off events. For 756722/756722 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 70637 event pairs, 2052 based on Foata normal form. 4/10407 useless extension candidates. Maximal degree in co-relation 101676. Up to 9918 conditions per place. [2024-06-27 21:35:49,242 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 381 selfloop transitions, 52 changer transitions 0/438 dead transitions. [2024-06-27 21:35:49,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 438 transitions, 8427 flow [2024-06-27 21:35:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:35:49,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-27 21:35:49,243 INFO L175 Difference]: Start difference. First operand has 260 places, 417 transitions, 7360 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:35:49,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 438 transitions, 8427 flow [2024-06-27 21:35:50,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 438 transitions, 8244 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:50,972 INFO L231 Difference]: Finished difference. Result has 262 places, 417 transitions, 7295 flow [2024-06-27 21:35:50,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7295, PETRI_PLACES=262, PETRI_TRANSITIONS=417} [2024-06-27 21:35:50,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-27 21:35:50,972 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 417 transitions, 7295 flow [2024-06-27 21:35:50,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:35:50,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:50,973 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 21:35:50,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:35:50,973 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:50,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:50,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1749247198, now seen corresponding path program 2 times [2024-06-27 21:35:50,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:50,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711462142] [2024-06-27 21:35:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:50,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711462142] [2024-06-27 21:35:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711462142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:51,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:51,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667341033] [2024-06-27 21:35:51,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:51,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:51,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 417 transitions, 7295 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:35:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:53,773 INFO L124 PetriNetUnfolderBase]: 6478/10428 cut-off events. [2024-06-27 21:35:53,774 INFO L125 PetriNetUnfolderBase]: For 755831/755831 co-relation queries the response was YES. [2024-06-27 21:35:53,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101693 conditions, 10428 events. 6478/10428 cut-off events. For 755831/755831 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 70767 event pairs, 2134 based on Foata normal form. 2/10427 useless extension candidates. Maximal degree in co-relation 101568. Up to 10076 conditions per place. [2024-06-27 21:35:53,905 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 404 selfloop transitions, 30 changer transitions 0/439 dead transitions. [2024-06-27 21:35:53,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 8377 flow [2024-06-27 21:35:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:35:53,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 21:35:53,907 INFO L175 Difference]: Start difference. First operand has 262 places, 417 transitions, 7295 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:35:53,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 8377 flow [2024-06-27 21:35:55,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 439 transitions, 8287 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:55,073 INFO L231 Difference]: Finished difference. Result has 265 places, 423 transitions, 7427 flow [2024-06-27 21:35:55,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7210, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7427, PETRI_PLACES=265, PETRI_TRANSITIONS=423} [2024-06-27 21:35:55,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 21:35:55,074 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 423 transitions, 7427 flow [2024-06-27 21:35:55,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 21:35:55,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:55,074 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 21:35:55,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:35:55,074 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:55,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash 812727583, now seen corresponding path program 8 times [2024-06-27 21:35:55,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:55,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487457260] [2024-06-27 21:35:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:55,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:56,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:56,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487457260] [2024-06-27 21:35:56,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487457260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:56,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:56,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669351128] [2024-06-27 21:35:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:56,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:35:56,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 423 transitions, 7427 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:56,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:56,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:35:56,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:58,742 INFO L124 PetriNetUnfolderBase]: 6648/10719 cut-off events. [2024-06-27 21:35:58,743 INFO L125 PetriNetUnfolderBase]: For 833901/833901 co-relation queries the response was YES. [2024-06-27 21:35:58,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105359 conditions, 10719 events. 6648/10719 cut-off events. For 833901/833901 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 73371 event pairs, 1793 based on Foata normal form. 16/10726 useless extension candidates. Maximal degree in co-relation 105233. Up to 9200 conditions per place. [2024-06-27 21:35:59,179 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 392 selfloop transitions, 93 changer transitions 0/490 dead transitions. [2024-06-27 21:35:59,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 490 transitions, 9707 flow [2024-06-27 21:35:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 21:35:59,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-27 21:35:59,181 INFO L175 Difference]: Start difference. First operand has 265 places, 423 transitions, 7427 flow. Second operand 9 states and 195 transitions. [2024-06-27 21:35:59,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 490 transitions, 9707 flow [2024-06-27 21:36:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 490 transitions, 9634 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:00,615 INFO L231 Difference]: Finished difference. Result has 272 places, 440 transitions, 8062 flow [2024-06-27 21:36:00,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8062, PETRI_PLACES=272, PETRI_TRANSITIONS=440} [2024-06-27 21:36:00,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 21:36:00,616 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 440 transitions, 8062 flow [2024-06-27 21:36:00,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:00,617 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 21:36:00,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:36:00,617 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:00,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1029450695, now seen corresponding path program 6 times [2024-06-27 21:36:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854961009] [2024-06-27 21:36:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854961009] [2024-06-27 21:36:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854961009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:01,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:01,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840794365] [2024-06-27 21:36:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:01,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 440 transitions, 8062 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:01,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:05,173 INFO L124 PetriNetUnfolderBase]: 8197/13401 cut-off events. [2024-06-27 21:36:05,173 INFO L125 PetriNetUnfolderBase]: For 1169692/1169692 co-relation queries the response was YES. [2024-06-27 21:36:05,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132784 conditions, 13401 events. 8197/13401 cut-off events. For 1169692/1169692 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 96666 event pairs, 2362 based on Foata normal form. 48/13432 useless extension candidates. Maximal degree in co-relation 132655. Up to 6244 conditions per place. [2024-06-27 21:36:05,343 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 285 selfloop transitions, 242 changer transitions 0/532 dead transitions. [2024-06-27 21:36:05,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 532 transitions, 11162 flow [2024-06-27 21:36:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 21:36:05,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-27 21:36:05,345 INFO L175 Difference]: Start difference. First operand has 272 places, 440 transitions, 8062 flow. Second operand 10 states and 226 transitions. [2024-06-27 21:36:05,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 532 transitions, 11162 flow [2024-06-27 21:36:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 532 transitions, 10829 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:07,267 INFO L231 Difference]: Finished difference. Result has 282 places, 459 transitions, 9133 flow [2024-06-27 21:36:07,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9133, PETRI_PLACES=282, PETRI_TRANSITIONS=459} [2024-06-27 21:36:07,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-27 21:36:07,268 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 459 transitions, 9133 flow [2024-06-27 21:36:07,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:07,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:07,268 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 21:36:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:36:07,269 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:07,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1343409395, now seen corresponding path program 7 times [2024-06-27 21:36:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:07,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828287744] [2024-06-27 21:36:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:07,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828287744] [2024-06-27 21:36:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828287744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:08,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225938024] [2024-06-27 21:36:08,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:08,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:08,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:08,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:08,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 459 transitions, 9133 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:08,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:08,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:12,079 INFO L124 PetriNetUnfolderBase]: 8851/14564 cut-off events. [2024-06-27 21:36:12,079 INFO L125 PetriNetUnfolderBase]: For 1412180/1412180 co-relation queries the response was YES. [2024-06-27 21:36:12,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149601 conditions, 14564 events. 8851/14564 cut-off events. For 1412180/1412180 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 108072 event pairs, 2894 based on Foata normal form. 72/14627 useless extension candidates. Maximal degree in co-relation 149467. Up to 10938 conditions per place. [2024-06-27 21:36:12,290 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 372 selfloop transitions, 151 changer transitions 0/528 dead transitions. [2024-06-27 21:36:12,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 528 transitions, 11545 flow [2024-06-27 21:36:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:36:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:36:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-27 21:36:12,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541019955654102 [2024-06-27 21:36:12,291 INFO L175 Difference]: Start difference. First operand has 282 places, 459 transitions, 9133 flow. Second operand 11 states and 244 transitions. [2024-06-27 21:36:12,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 528 transitions, 11545 flow [2024-06-27 21:36:14,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 528 transitions, 11359 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:14,805 INFO L231 Difference]: Finished difference. Result has 291 places, 464 transitions, 9573 flow [2024-06-27 21:36:14,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9573, PETRI_PLACES=291, PETRI_TRANSITIONS=464} [2024-06-27 21:36:14,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 21:36:14,806 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 464 transitions, 9573 flow [2024-06-27 21:36:14,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:14,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:14,807 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 21:36:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:36:14,807 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:14,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1598728053, now seen corresponding path program 8 times [2024-06-27 21:36:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:14,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921484014] [2024-06-27 21:36:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:15,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921484014] [2024-06-27 21:36:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921484014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:15,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:15,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116455479] [2024-06-27 21:36:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:15,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 464 transitions, 9573 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:15,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:15,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:19,925 INFO L124 PetriNetUnfolderBase]: 9230/15180 cut-off events. [2024-06-27 21:36:19,925 INFO L125 PetriNetUnfolderBase]: For 1502469/1502469 co-relation queries the response was YES. [2024-06-27 21:36:20,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156427 conditions, 15180 events. 9230/15180 cut-off events. For 1502469/1502469 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 113617 event pairs, 3154 based on Foata normal form. 85/15248 useless extension candidates. Maximal degree in co-relation 156291. Up to 13022 conditions per place. [2024-06-27 21:36:20,161 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 343 selfloop transitions, 182 changer transitions 0/530 dead transitions. [2024-06-27 21:36:20,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 530 transitions, 11870 flow [2024-06-27 21:36:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 21:36:20,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-27 21:36:20,162 INFO L175 Difference]: Start difference. First operand has 291 places, 464 transitions, 9573 flow. Second operand 10 states and 218 transitions. [2024-06-27 21:36:20,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 530 transitions, 11870 flow [2024-06-27 21:36:22,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 530 transitions, 11549 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:22,502 INFO L231 Difference]: Finished difference. Result has 297 places, 479 transitions, 10159 flow [2024-06-27 21:36:22,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10159, PETRI_PLACES=297, PETRI_TRANSITIONS=479} [2024-06-27 21:36:22,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 21:36:22,503 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 479 transitions, 10159 flow [2024-06-27 21:36:22,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:22,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:22,503 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 21:36:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:36:22,504 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:22,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1343416835, now seen corresponding path program 9 times [2024-06-27 21:36:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:22,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116492316] [2024-06-27 21:36:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:22,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116492316] [2024-06-27 21:36:23,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116492316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:23,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:23,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:23,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100913322] [2024-06-27 21:36:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:23,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:23,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 479 transitions, 10159 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:23,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:27,772 INFO L124 PetriNetUnfolderBase]: 9266/15276 cut-off events. [2024-06-27 21:36:27,772 INFO L125 PetriNetUnfolderBase]: For 1484194/1484194 co-relation queries the response was YES. [2024-06-27 21:36:27,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155647 conditions, 15276 events. 9266/15276 cut-off events. For 1484194/1484194 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 115131 event pairs, 3116 based on Foata normal form. 85/15344 useless extension candidates. Maximal degree in co-relation 155506. Up to 12702 conditions per place. [2024-06-27 21:36:27,997 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 285 selfloop transitions, 247 changer transitions 0/537 dead transitions. [2024-06-27 21:36:27,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 537 transitions, 12272 flow [2024-06-27 21:36:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 21:36:27,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-27 21:36:27,999 INFO L175 Difference]: Start difference. First operand has 297 places, 479 transitions, 10159 flow. Second operand 10 states and 218 transitions. [2024-06-27 21:36:27,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 537 transitions, 12272 flow [2024-06-27 21:36:30,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 537 transitions, 11880 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:30,241 INFO L231 Difference]: Finished difference. Result has 306 places, 486 transitions, 10581 flow [2024-06-27 21:36:30,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10581, PETRI_PLACES=306, PETRI_TRANSITIONS=486} [2024-06-27 21:36:30,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 21:36:30,242 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 486 transitions, 10581 flow [2024-06-27 21:36:30,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:30,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:30,242 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 21:36:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:36:30,243 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:30,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1019801755, now seen corresponding path program 10 times [2024-06-27 21:36:30,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373103620] [2024-06-27 21:36:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:30,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373103620] [2024-06-27 21:36:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373103620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:31,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:31,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813742013] [2024-06-27 21:36:31,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:31,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:31,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:31,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 486 transitions, 10581 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:31,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:31,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:31,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:35,832 INFO L124 PetriNetUnfolderBase]: 9795/16240 cut-off events. [2024-06-27 21:36:35,833 INFO L125 PetriNetUnfolderBase]: For 1656031/1656031 co-relation queries the response was YES. [2024-06-27 21:36:36,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167966 conditions, 16240 events. 9795/16240 cut-off events. For 1656031/1656031 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 124454 event pairs, 3382 based on Foata normal form. 72/16303 useless extension candidates. Maximal degree in co-relation 167820. Up to 12842 conditions per place. [2024-06-27 21:36:36,089 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 436 selfloop transitions, 106 changer transitions 0/547 dead transitions. [2024-06-27 21:36:36,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 547 transitions, 12840 flow [2024-06-27 21:36:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 21:36:36,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-27 21:36:36,091 INFO L175 Difference]: Start difference. First operand has 306 places, 486 transitions, 10581 flow. Second operand 10 states and 221 transitions. [2024-06-27 21:36:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 547 transitions, 12840 flow [2024-06-27 21:36:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 547 transitions, 12261 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:38,963 INFO L231 Difference]: Finished difference. Result has 311 places, 490 transitions, 10469 flow [2024-06-27 21:36:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10002, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10469, PETRI_PLACES=311, PETRI_TRANSITIONS=490} [2024-06-27 21:36:38,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-27 21:36:38,964 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 490 transitions, 10469 flow [2024-06-27 21:36:38,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:38,964 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 21:36:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:36:38,964 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:38,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1019534845, now seen corresponding path program 11 times [2024-06-27 21:36:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351637698] [2024-06-27 21:36:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351637698] [2024-06-27 21:36:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351637698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:39,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:36:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132386645] [2024-06-27 21:36:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:36:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:36:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:36:39,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 21:36:39,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 490 transitions, 10469 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:39,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:39,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 21:36:39,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand