./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:08:56,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:08:56,452 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:08:56,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:08:56,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:08:56,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:08:56,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:08:56,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:08:56,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:08:56,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:08:56,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:08:56,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:08:56,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:08:56,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:08:56,481 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:08:56,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:08:56,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:08:56,482 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:08:56,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:08:56,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:08:56,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:08:56,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:08:56,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:08:56,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:08:56,490 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:08:56,491 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:08:56,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:08:56,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:08:56,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:08:56,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:08:56,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:08:56,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:08:56,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:08:56,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:08:56,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:08:56,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:08:56,494 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:08:56,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:08:56,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:08:56,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:08:56,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:08:56,776 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:08:56,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 19:08:57,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:08:57,983 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:08:57,984 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 19:08:57,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0abce66b/073e6d76bcdc4256afb3d4f23cbb7802/FLAG7b1a2ed4f [2024-06-27 19:08:58,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0abce66b/073e6d76bcdc4256afb3d4f23cbb7802 [2024-06-27 19:08:58,013 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:08:58,013 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:08:58,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 19:08:58,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:08:58,148 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:08:58,148 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:08:58,148 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:08:58,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:08:58,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:08:58" (1/2) ... [2024-06-27 19:08:58,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e21f266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:08:58, skipping insertion in model container [2024-06-27 19:08:58,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:08:58" (1/2) ... [2024-06-27 19:08:58,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a089942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:08:58, skipping insertion in model container [2024-06-27 19:08:58,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:08:58" (2/2) ... [2024-06-27 19:08:58,156 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e21f266 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58, skipping insertion in model container [2024-06-27 19:08:58,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:08:58" (2/2) ... [2024-06-27 19:08:58,156 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:08:58,226 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:08:58,227 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 19:08:58,227 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 19:08:58,228 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-27 19:08:58,228 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:08:58,228 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-27 19:08:58,266 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:08:58,428 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i[967,980] [2024-06-27 19:08:58,636 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:08:58,648 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:08:58,680 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i[967,980] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:08:58,735 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:08:58,762 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:08:58,762 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58 WrapperNode [2024-06-27 19:08:58,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:08:58,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:08:58,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:08:58,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:08:58,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,806 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2024-06-27 19:08:58,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:08:58,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:08:58,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:08:58,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:08:58,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,893 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 19:08:58,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:08:58,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:08:58,913 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:08:58,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:08:58,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (1/1) ... [2024-06-27 19:08:58,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:08:58,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:08:58,941 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 19:08:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:08:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:08:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:08:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:08:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:08:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:08:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:08:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:08:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:08:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:08:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:08:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:08:58,975 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 19:08:58,949 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 19:08:59,098 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:08:59,100 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:08:59,378 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:08:59,378 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:08:59,520 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:08:59,521 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:08:59,521 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:08:59 BoogieIcfgContainer [2024-06-27 19:08:59,521 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:08:59,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:08:59,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:08:59,527 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:08:59,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:08:58" (1/4) ... [2024-06-27 19:08:59,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7366060d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:08:59, skipping insertion in model container [2024-06-27 19:08:59,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:08:58" (2/4) ... [2024-06-27 19:08:59,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7366060d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:08:59, skipping insertion in model container [2024-06-27 19:08:59,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:08:58" (3/4) ... [2024-06-27 19:08:59,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7366060d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:08:59, skipping insertion in model container [2024-06-27 19:08:59,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:08:59" (4/4) ... [2024-06-27 19:08:59,530 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-27 19:08:59,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:08:59,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 19:08:59,544 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:08:59,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:08:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 19:08:59,697 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 19:08:59,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:08:59,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 19:08:59,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 19:08:59,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 44 transitions, 97 flow [2024-06-27 19:08:59,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:08:59,716 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;@6ba66630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:08:59,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 19:08:59,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:08:59,719 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:08:59,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:08:59,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:59,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:08:59,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:59,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 346944903, now seen corresponding path program 1 times [2024-06-27 19:08:59,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761189339] [2024-06-27 19:08:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:59,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:00,420 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 19:09:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:00,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761189339] [2024-06-27 19:09:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761189339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:00,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:09:00,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841796997] [2024-06-27 19:09:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:09:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:09:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:09:00,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 19:09:00,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 19:09:00,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:01,127 INFO L124 PetriNetUnfolderBase]: 3270/5258 cut-off events. [2024-06-27 19:09:01,127 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 19:09:01,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10045 conditions, 5258 events. 3270/5258 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33443 event pairs, 2609 based on Foata normal form. 169/5026 useless extension candidates. Maximal degree in co-relation 10033. Up to 4711 conditions per place. [2024-06-27 19:09:01,160 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 42 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 19:09:01,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 227 flow [2024-06-27 19:09:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:09:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:09:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-27 19:09:01,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6879432624113475 [2024-06-27 19:09:01,171 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 97 flow. Second operand 3 states and 97 transitions. [2024-06-27 19:09:01,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 227 flow [2024-06-27 19:09:01,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:01,179 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 129 flow [2024-06-27 19:09:01,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 19:09:01,183 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-06-27 19:09:01,183 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 129 flow [2024-06-27 19:09:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:01,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:01,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:01,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:09:01,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:01,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1593363482, now seen corresponding path program 1 times [2024-06-27 19:09:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176145997] [2024-06-27 19:09:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:01,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:01,701 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 19:09:01,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:01,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176145997] [2024-06-27 19:09:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176145997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:01,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:01,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:09:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832213413] [2024-06-27 19:09:01,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:01,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:09:01,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:01,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:09:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:09:01,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 19:09:01,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:01,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:01,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 19:09:01,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:02,258 INFO L124 PetriNetUnfolderBase]: 3263/4762 cut-off events. [2024-06-27 19:09:02,259 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2024-06-27 19:09:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10743 conditions, 4762 events. 3263/4762 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26760 event pairs, 1571 based on Foata normal form. 3/4557 useless extension candidates. Maximal degree in co-relation 10731. Up to 4676 conditions per place. [2024-06-27 19:09:02,284 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 54 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-27 19:09:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 325 flow [2024-06-27 19:09:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:09:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:09:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 19:09:02,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 19:09:02,288 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 129 flow. Second operand 4 states and 126 transitions. [2024-06-27 19:09:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 325 flow [2024-06-27 19:09:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:02,294 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 175 flow [2024-06-27 19:09:02,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 19:09:02,295 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-06-27 19:09:02,296 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 175 flow [2024-06-27 19:09:02,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:02,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:02,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:09:02,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:02,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -549871871, now seen corresponding path program 1 times [2024-06-27 19:09:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:02,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631711334] [2024-06-27 19:09:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:02,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:02,771 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 19:09:02,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:02,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631711334] [2024-06-27 19:09:02,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631711334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:02,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:02,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:09:02,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911064426] [2024-06-27 19:09:02,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:02,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:09:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:09:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:09:02,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:02,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:02,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:02,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:02,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:03,592 INFO L124 PetriNetUnfolderBase]: 4683/6739 cut-off events. [2024-06-27 19:09:03,593 INFO L125 PetriNetUnfolderBase]: For 2285/2285 co-relation queries the response was YES. [2024-06-27 19:09:03,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16598 conditions, 6739 events. 4683/6739 cut-off events. For 2285/2285 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36848 event pairs, 2330 based on Foata normal form. 2/6473 useless extension candidates. Maximal degree in co-relation 16583. Up to 6668 conditions per place. [2024-06-27 19:09:03,634 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 19:09:03,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 383 flow [2024-06-27 19:09:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:09:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:09:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:09:03,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404255319148936 [2024-06-27 19:09:03,638 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 175 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:09:03,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 383 flow [2024-06-27 19:09:03,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:09:03,642 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 211 flow [2024-06-27 19:09:03,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 19:09:03,644 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-06-27 19:09:03,644 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 211 flow [2024-06-27 19:09:03,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:03,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:03,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:09:03,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:03,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1561561948, now seen corresponding path program 1 times [2024-06-27 19:09:03,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:03,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814010073] [2024-06-27 19:09:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:03,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:04,102 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 19:09:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:04,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814010073] [2024-06-27 19:09:04,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814010073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:04,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:09:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087391710] [2024-06-27 19:09:04,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:04,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:09:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:04,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:09:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:09:04,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 19:09:04,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:09:04,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:04,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 19:09:04,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:04,815 INFO L124 PetriNetUnfolderBase]: 4149/6601 cut-off events. [2024-06-27 19:09:04,815 INFO L125 PetriNetUnfolderBase]: For 4340/4340 co-relation queries the response was YES. [2024-06-27 19:09:04,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 6601 events. 4149/6601 cut-off events. For 4340/4340 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 41545 event pairs, 2004 based on Foata normal form. 6/6163 useless extension candidates. Maximal degree in co-relation 16621. Up to 5840 conditions per place. [2024-06-27 19:09:04,847 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 80 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2024-06-27 19:09:04,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 539 flow [2024-06-27 19:09:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 19:09:04,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 19:09:04,849 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 211 flow. Second operand 6 states and 179 transitions. [2024-06-27 19:09:04,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 539 flow [2024-06-27 19:09:04,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 107 transitions, 514 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:04,852 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 269 flow [2024-06-27 19:09:04,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 19:09:04,852 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-27 19:09:04,852 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 269 flow [2024-06-27 19:09:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:09:04,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:04,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:04,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:09:04,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:04,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash 90942938, now seen corresponding path program 1 times [2024-06-27 19:09:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:04,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913981121] [2024-06-27 19:09:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:04,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:05,326 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 19:09:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913981121] [2024-06-27 19:09:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913981121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:05,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:05,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141204930] [2024-06-27 19:09:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:05,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:05,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:05,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:05,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:05,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:05,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:05,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:06,178 INFO L124 PetriNetUnfolderBase]: 4660/7327 cut-off events. [2024-06-27 19:09:06,178 INFO L125 PetriNetUnfolderBase]: For 7171/7171 co-relation queries the response was YES. [2024-06-27 19:09:06,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19926 conditions, 7327 events. 4660/7327 cut-off events. For 7171/7171 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 45990 event pairs, 2021 based on Foata normal form. 4/6858 useless extension candidates. Maximal degree in co-relation 19908. Up to 6614 conditions per place. [2024-06-27 19:09:06,223 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 75 selfloop transitions, 17 changer transitions 0/101 dead transitions. [2024-06-27 19:09:06,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 590 flow [2024-06-27 19:09:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:09:06,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 19:09:06,225 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 269 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:09:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 590 flow [2024-06-27 19:09:06,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 540 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:06,234 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 380 flow [2024-06-27 19:09:06,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-27 19:09:06,236 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-06-27 19:09:06,236 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 380 flow [2024-06-27 19:09:06,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:06,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:06,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:06,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:09:06,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:06,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash 90598083, now seen corresponding path program 1 times [2024-06-27 19:09:06,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:06,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67755763] [2024-06-27 19:09:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:06,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:06,296 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 19:09:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67755763] [2024-06-27 19:09:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67755763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:06,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:09:06,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446225374] [2024-06-27 19:09:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:09:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:09:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:09:06,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2024-06-27 19:09:06,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:06,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:06,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2024-06-27 19:09:06,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:06,542 INFO L124 PetriNetUnfolderBase]: 1307/2608 cut-off events. [2024-06-27 19:09:06,542 INFO L125 PetriNetUnfolderBase]: For 3574/3704 co-relation queries the response was YES. [2024-06-27 19:09:06,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6423 conditions, 2608 events. 1307/2608 cut-off events. For 3574/3704 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19347 event pairs, 428 based on Foata normal form. 11/2384 useless extension candidates. Maximal degree in co-relation 6402. Up to 1667 conditions per place. [2024-06-27 19:09:06,559 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 30 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-27 19:09:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 416 flow [2024-06-27 19:09:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:09:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:09:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-27 19:09:06,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7446808510638298 [2024-06-27 19:09:06,561 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 380 flow. Second operand 3 states and 105 transitions. [2024-06-27 19:09:06,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 416 flow [2024-06-27 19:09:06,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 402 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:06,565 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 322 flow [2024-06-27 19:09:06,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-27 19:09:06,566 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-06-27 19:09:06,566 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 322 flow [2024-06-27 19:09:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:06,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:06,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:09:06,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:06,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1475981470, now seen corresponding path program 1 times [2024-06-27 19:09:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645668687] [2024-06-27 19:09:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:07,023 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 19:09:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:07,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645668687] [2024-06-27 19:09:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645668687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169450514] [2024-06-27 19:09:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:07,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:07,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 322 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:07,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:07,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:07,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:07,773 INFO L124 PetriNetUnfolderBase]: 4016/5921 cut-off events. [2024-06-27 19:09:07,773 INFO L125 PetriNetUnfolderBase]: For 10311/10317 co-relation queries the response was YES. [2024-06-27 19:09:07,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17508 conditions, 5921 events. 4016/5921 cut-off events. For 10311/10317 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 33498 event pairs, 1364 based on Foata normal form. 8/5890 useless extension candidates. Maximal degree in co-relation 17485. Up to 5661 conditions per place. [2024-06-27 19:09:07,803 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 76 selfloop transitions, 21 changer transitions 4/110 dead transitions. [2024-06-27 19:09:07,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 676 flow [2024-06-27 19:09:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:09:07,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-27 19:09:07,806 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 322 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:09:07,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 676 flow [2024-06-27 19:09:07,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 652 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 19:09:07,811 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 396 flow [2024-06-27 19:09:07,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 19:09:07,812 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2024-06-27 19:09:07,813 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 396 flow [2024-06-27 19:09:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:07,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:07,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:07,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:09:07,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:07,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash -102081310, now seen corresponding path program 2 times [2024-06-27 19:09:07,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:07,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641726942] [2024-06-27 19:09:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:08,260 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 19:09:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:08,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641726942] [2024-06-27 19:09:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641726942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:08,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146601572] [2024-06-27 19:09:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:08,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:08,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 396 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:08,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:08,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:08,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:09,050 INFO L124 PetriNetUnfolderBase]: 3564/5276 cut-off events. [2024-06-27 19:09:09,050 INFO L125 PetriNetUnfolderBase]: For 11084/11084 co-relation queries the response was YES. [2024-06-27 19:09:09,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16526 conditions, 5276 events. 3564/5276 cut-off events. For 11084/11084 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29692 event pairs, 1219 based on Foata normal form. 2/5238 useless extension candidates. Maximal degree in co-relation 16501. Up to 5037 conditions per place. [2024-06-27 19:09:09,077 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 72 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-27 19:09:09,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 656 flow [2024-06-27 19:09:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:09:09,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 19:09:09,079 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 396 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:09:09,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 656 flow [2024-06-27 19:09:09,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 617 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:09:09,091 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 408 flow [2024-06-27 19:09:09,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-27 19:09:09,092 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-06-27 19:09:09,093 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 408 flow [2024-06-27 19:09:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 19:09:09,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:09,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:09:09,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1417915109, now seen corresponding path program 1 times [2024-06-27 19:09:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25622245] [2024-06-27 19:09:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:09,513 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 19:09:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25622245] [2024-06-27 19:09:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25622245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748445746] [2024-06-27 19:09:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:09,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:09,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:09,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:09,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:09,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:10,295 INFO L124 PetriNetUnfolderBase]: 3723/5944 cut-off events. [2024-06-27 19:09:10,296 INFO L125 PetriNetUnfolderBase]: For 13186/13186 co-relation queries the response was YES. [2024-06-27 19:09:10,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17861 conditions, 5944 events. 3723/5944 cut-off events. For 13186/13186 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 36389 event pairs, 1371 based on Foata normal form. 4/5765 useless extension candidates. Maximal degree in co-relation 17834. Up to 5089 conditions per place. [2024-06-27 19:09:10,332 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 102 selfloop transitions, 44 changer transitions 0/155 dead transitions. [2024-06-27 19:09:10,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 155 transitions, 1107 flow [2024-06-27 19:09:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:09:10,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 19:09:10,334 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 408 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:09:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 155 transitions, 1107 flow [2024-06-27 19:09:10,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 155 transitions, 989 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:10,343 INFO L231 Difference]: Finished difference. Result has 79 places, 104 transitions, 683 flow [2024-06-27 19:09:10,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=683, PETRI_PLACES=79, PETRI_TRANSITIONS=104} [2024-06-27 19:09:10,344 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2024-06-27 19:09:10,344 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 104 transitions, 683 flow [2024-06-27 19:09:10,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:10,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:10,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:10,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:09:10,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:10,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1289913691, now seen corresponding path program 2 times [2024-06-27 19:09:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734118346] [2024-06-27 19:09:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:10,834 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 19:09:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734118346] [2024-06-27 19:09:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734118346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:10,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:10,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201308919] [2024-06-27 19:09:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:10,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:10,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:10,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 104 transitions, 683 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:10,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:10,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:10,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:11,687 INFO L124 PetriNetUnfolderBase]: 3799/6046 cut-off events. [2024-06-27 19:09:11,687 INFO L125 PetriNetUnfolderBase]: For 17304/17304 co-relation queries the response was YES. [2024-06-27 19:09:11,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 6046 events. 3799/6046 cut-off events. For 17304/17304 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 36877 event pairs, 1385 based on Foata normal form. 6/5869 useless extension candidates. Maximal degree in co-relation 19895. Up to 5155 conditions per place. [2024-06-27 19:09:11,714 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 97 selfloop transitions, 53 changer transitions 0/159 dead transitions. [2024-06-27 19:09:11,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 159 transitions, 1255 flow [2024-06-27 19:09:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:09:11,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 19:09:11,716 INFO L175 Difference]: Start difference. First operand has 79 places, 104 transitions, 683 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:09:11,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 159 transitions, 1255 flow [2024-06-27 19:09:11,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 159 transitions, 1197 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:11,729 INFO L231 Difference]: Finished difference. Result has 85 places, 116 transitions, 892 flow [2024-06-27 19:09:11,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=85, PETRI_TRANSITIONS=116} [2024-06-27 19:09:11,730 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 32 predicate places. [2024-06-27 19:09:11,730 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 116 transitions, 892 flow [2024-06-27 19:09:11,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:11,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:11,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:09:11,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:11,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash 992491545, now seen corresponding path program 3 times [2024-06-27 19:09:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:11,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519366226] [2024-06-27 19:09:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:12,208 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 19:09:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519366226] [2024-06-27 19:09:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519366226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:12,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:12,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:12,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012276258] [2024-06-27 19:09:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:12,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 116 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:13,102 INFO L124 PetriNetUnfolderBase]: 3875/6163 cut-off events. [2024-06-27 19:09:13,102 INFO L125 PetriNetUnfolderBase]: For 20017/20017 co-relation queries the response was YES. [2024-06-27 19:09:13,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 6163 events. 3875/6163 cut-off events. For 20017/20017 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 37577 event pairs, 1368 based on Foata normal form. 6/5985 useless extension candidates. Maximal degree in co-relation 21119. Up to 5221 conditions per place. [2024-06-27 19:09:13,140 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 96 selfloop transitions, 62 changer transitions 0/167 dead transitions. [2024-06-27 19:09:13,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 167 transitions, 1489 flow [2024-06-27 19:09:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:09:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 19:09:13,142 INFO L175 Difference]: Start difference. First operand has 85 places, 116 transitions, 892 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:09:13,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 167 transitions, 1489 flow [2024-06-27 19:09:13,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 167 transitions, 1374 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:13,163 INFO L231 Difference]: Finished difference. Result has 89 places, 127 transitions, 1052 flow [2024-06-27 19:09:13,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1052, PETRI_PLACES=89, PETRI_TRANSITIONS=127} [2024-06-27 19:09:13,163 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 36 predicate places. [2024-06-27 19:09:13,163 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 127 transitions, 1052 flow [2024-06-27 19:09:13,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:13,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:13,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:13,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:09:13,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:13,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1496834041, now seen corresponding path program 4 times [2024-06-27 19:09:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:13,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634793923] [2024-06-27 19:09:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:13,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:13,647 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 19:09:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634793923] [2024-06-27 19:09:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634793923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:13,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517799965] [2024-06-27 19:09:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:13,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:13,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 127 transitions, 1052 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:13,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:13,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:13,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:14,612 INFO L124 PetriNetUnfolderBase]: 3859/6137 cut-off events. [2024-06-27 19:09:14,612 INFO L125 PetriNetUnfolderBase]: For 20185/20185 co-relation queries the response was YES. [2024-06-27 19:09:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21002 conditions, 6137 events. 3859/6137 cut-off events. For 20185/20185 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 37451 event pairs, 1356 based on Foata normal form. 6/5959 useless extension candidates. Maximal degree in co-relation 20968. Up to 5208 conditions per place. [2024-06-27 19:09:14,650 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 92 selfloop transitions, 66 changer transitions 0/167 dead transitions. [2024-06-27 19:09:14,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 167 transitions, 1514 flow [2024-06-27 19:09:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:09:14,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 19:09:14,653 INFO L175 Difference]: Start difference. First operand has 89 places, 127 transitions, 1052 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:09:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 167 transitions, 1514 flow [2024-06-27 19:09:14,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 167 transitions, 1368 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:14,675 INFO L231 Difference]: Finished difference. Result has 93 places, 129 transitions, 1071 flow [2024-06-27 19:09:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=93, PETRI_TRANSITIONS=129} [2024-06-27 19:09:14,676 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-06-27 19:09:14,676 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 129 transitions, 1071 flow [2024-06-27 19:09:14,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:14,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:14,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:14,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:09:14,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:14,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -226851559, now seen corresponding path program 1 times [2024-06-27 19:09:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293986566] [2024-06-27 19:09:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:15,488 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 19:09:15,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293986566] [2024-06-27 19:09:15,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293986566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:15,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:15,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:15,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671071327] [2024-06-27 19:09:15,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:15,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:15,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:15,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 129 transitions, 1071 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:15,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:15,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:15,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:16,327 INFO L124 PetriNetUnfolderBase]: 3851/6135 cut-off events. [2024-06-27 19:09:16,327 INFO L125 PetriNetUnfolderBase]: For 21448/21448 co-relation queries the response was YES. [2024-06-27 19:09:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20962 conditions, 6135 events. 3851/6135 cut-off events. For 21448/21448 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 37378 event pairs, 1380 based on Foata normal form. 4/5957 useless extension candidates. Maximal degree in co-relation 20926. Up to 5438 conditions per place. [2024-06-27 19:09:16,364 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 139 selfloop transitions, 17 changer transitions 0/165 dead transitions. [2024-06-27 19:09:16,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 165 transitions, 1505 flow [2024-06-27 19:09:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:09:16,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015197568389058 [2024-06-27 19:09:16,366 INFO L175 Difference]: Start difference. First operand has 93 places, 129 transitions, 1071 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:09:16,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 165 transitions, 1505 flow [2024-06-27 19:09:16,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 165 transitions, 1398 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:16,439 INFO L231 Difference]: Finished difference. Result has 96 places, 132 transitions, 1040 flow [2024-06-27 19:09:16,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1040, PETRI_PLACES=96, PETRI_TRANSITIONS=132} [2024-06-27 19:09:16,439 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 43 predicate places. [2024-06-27 19:09:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 132 transitions, 1040 flow [2024-06-27 19:09:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:16,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:16,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:09:16,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:16,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1165375958, now seen corresponding path program 1 times [2024-06-27 19:09:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998265956] [2024-06-27 19:09:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:16,837 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 19:09:16,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:16,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998265956] [2024-06-27 19:09:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998265956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:09:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99065945] [2024-06-27 19:09:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:09:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:09:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:09:16,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:09:16,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 1040 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:16,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:16,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:09:16,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:17,408 INFO L124 PetriNetUnfolderBase]: 3562/5839 cut-off events. [2024-06-27 19:09:17,408 INFO L125 PetriNetUnfolderBase]: For 22951/22952 co-relation queries the response was YES. [2024-06-27 19:09:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19918 conditions, 5839 events. 3562/5839 cut-off events. For 22951/22952 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 36186 event pairs, 1654 based on Foata normal form. 1/5654 useless extension candidates. Maximal degree in co-relation 19881. Up to 5074 conditions per place. [2024-06-27 19:09:17,492 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 118 selfloop transitions, 9 changer transitions 0/154 dead transitions. [2024-06-27 19:09:17,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1401 flow [2024-06-27 19:09:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:09:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:09:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:09:17,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-27 19:09:17,493 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 1040 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:09:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1401 flow [2024-06-27 19:09:17,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 154 transitions, 1343 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:17,514 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 1086 flow [2024-06-27 19:09:17,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1086, PETRI_PLACES=97, PETRI_TRANSITIONS=139} [2024-06-27 19:09:17,514 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 44 predicate places. [2024-06-27 19:09:17,514 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 1086 flow [2024-06-27 19:09:17,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:17,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:17,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:17,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:09:17,515 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:17,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1327851039, now seen corresponding path program 1 times [2024-06-27 19:09:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:17,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648479707] [2024-06-27 19:09:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:18,015 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 19:09:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648479707] [2024-06-27 19:09:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648479707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:18,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:18,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503350583] [2024-06-27 19:09:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:18,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:18,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 139 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:18,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:18,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:18,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:18,926 INFO L124 PetriNetUnfolderBase]: 3882/6180 cut-off events. [2024-06-27 19:09:18,926 INFO L125 PetriNetUnfolderBase]: For 27340/27340 co-relation queries the response was YES. [2024-06-27 19:09:18,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22485 conditions, 6180 events. 3882/6180 cut-off events. For 27340/27340 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 37539 event pairs, 1447 based on Foata normal form. 2/5999 useless extension candidates. Maximal degree in co-relation 22446. Up to 5467 conditions per place. [2024-06-27 19:09:18,961 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 150 selfloop transitions, 26 changer transitions 0/185 dead transitions. [2024-06-27 19:09:18,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 185 transitions, 1608 flow [2024-06-27 19:09:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:09:18,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 19:09:18,963 INFO L175 Difference]: Start difference. First operand has 97 places, 139 transitions, 1086 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:09:18,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 185 transitions, 1608 flow [2024-06-27 19:09:18,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 185 transitions, 1587 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:09:18,984 INFO L231 Difference]: Finished difference. Result has 102 places, 142 transitions, 1159 flow [2024-06-27 19:09:18,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1159, PETRI_PLACES=102, PETRI_TRANSITIONS=142} [2024-06-27 19:09:18,985 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-06-27 19:09:18,985 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 142 transitions, 1159 flow [2024-06-27 19:09:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:18,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:18,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:09:18,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:18,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash 891448835, now seen corresponding path program 2 times [2024-06-27 19:09:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777073811] [2024-06-27 19:09:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:19,461 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 19:09:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:19,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777073811] [2024-06-27 19:09:19,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777073811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:19,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:19,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054421623] [2024-06-27 19:09:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:19,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:19,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 142 transitions, 1159 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:19,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:19,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:19,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:20,463 INFO L124 PetriNetUnfolderBase]: 3908/6219 cut-off events. [2024-06-27 19:09:20,463 INFO L125 PetriNetUnfolderBase]: For 32163/32167 co-relation queries the response was YES. [2024-06-27 19:09:20,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23634 conditions, 6219 events. 3908/6219 cut-off events. For 32163/32167 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 37970 event pairs, 1401 based on Foata normal form. 6/6042 useless extension candidates. Maximal degree in co-relation 23593. Up to 5358 conditions per place. [2024-06-27 19:09:20,497 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 138 selfloop transitions, 48 changer transitions 0/195 dead transitions. [2024-06-27 19:09:20,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 195 transitions, 1811 flow [2024-06-27 19:09:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:09:20,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 19:09:20,499 INFO L175 Difference]: Start difference. First operand has 102 places, 142 transitions, 1159 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:09:20,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 195 transitions, 1811 flow [2024-06-27 19:09:20,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 195 transitions, 1745 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:20,520 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1274 flow [2024-06-27 19:09:20,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1274, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-06-27 19:09:20,521 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 51 predicate places. [2024-06-27 19:09:20,521 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1274 flow [2024-06-27 19:09:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:20,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:20,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:20,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:09:20,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:20,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1820058255, now seen corresponding path program 3 times [2024-06-27 19:09:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956172657] [2024-06-27 19:09:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:21,017 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 19:09:21,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:21,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956172657] [2024-06-27 19:09:21,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956172657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:21,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397657159] [2024-06-27 19:09:21,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:21,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:21,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1274 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:21,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:21,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:21,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:21,993 INFO L124 PetriNetUnfolderBase]: 3903/5885 cut-off events. [2024-06-27 19:09:21,994 INFO L125 PetriNetUnfolderBase]: For 36914/36914 co-relation queries the response was YES. [2024-06-27 19:09:22,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24190 conditions, 5885 events. 3903/5885 cut-off events. For 36914/36914 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 33740 event pairs, 1307 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 24148. Up to 5353 conditions per place. [2024-06-27 19:09:22,036 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 135 selfloop transitions, 47 changer transitions 0/191 dead transitions. [2024-06-27 19:09:22,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 191 transitions, 1794 flow [2024-06-27 19:09:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:09:22,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:09:22,038 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1274 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:09:22,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 191 transitions, 1794 flow [2024-06-27 19:09:22,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 191 transitions, 1721 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:22,074 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1305 flow [2024-06-27 19:09:22,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-27 19:09:22,074 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 55 predicate places. [2024-06-27 19:09:22,074 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1305 flow [2024-06-27 19:09:22,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:22,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:22,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:22,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:09:22,075 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:22,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1766917552, now seen corresponding path program 1 times [2024-06-27 19:09:22,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:22,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58975262] [2024-06-27 19:09:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:22,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:22,599 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 19:09:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58975262] [2024-06-27 19:09:22,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58975262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:22,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:22,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:22,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520636110] [2024-06-27 19:09:22,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:22,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:22,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:22,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:09:22,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1305 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:22,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:22,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:09:22,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:23,316 INFO L124 PetriNetUnfolderBase]: 3669/6010 cut-off events. [2024-06-27 19:09:23,316 INFO L125 PetriNetUnfolderBase]: For 38814/38822 co-relation queries the response was YES. [2024-06-27 19:09:23,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23628 conditions, 6010 events. 3669/6010 cut-off events. For 38814/38822 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 37463 event pairs, 1585 based on Foata normal form. 3/5819 useless extension candidates. Maximal degree in co-relation 23584. Up to 5091 conditions per place. [2024-06-27 19:09:23,359 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 138 selfloop transitions, 23 changer transitions 0/188 dead transitions. [2024-06-27 19:09:23,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 188 transitions, 1892 flow [2024-06-27 19:09:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:09:23,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 19:09:23,360 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1305 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:09:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 188 transitions, 1892 flow [2024-06-27 19:09:23,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 188 transitions, 1753 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:23,389 INFO L231 Difference]: Finished difference. Result has 110 places, 164 transitions, 1422 flow [2024-06-27 19:09:23,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=110, PETRI_TRANSITIONS=164} [2024-06-27 19:09:23,390 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-27 19:09:23,390 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 164 transitions, 1422 flow [2024-06-27 19:09:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:23,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:23,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:23,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:09:23,391 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:23,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash -299101670, now seen corresponding path program 1 times [2024-06-27 19:09:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:23,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958897134] [2024-06-27 19:09:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:23,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:23,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958897134] [2024-06-27 19:09:23,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958897134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:23,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958697227] [2024-06-27 19:09:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:23,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:23,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 164 transitions, 1422 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:23,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:23,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:23,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:24,977 INFO L124 PetriNetUnfolderBase]: 4178/6625 cut-off events. [2024-06-27 19:09:24,977 INFO L125 PetriNetUnfolderBase]: For 49089/49089 co-relation queries the response was YES. [2024-06-27 19:09:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28377 conditions, 6625 events. 4178/6625 cut-off events. For 49089/49089 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 40188 event pairs, 1566 based on Foata normal form. 4/6441 useless extension candidates. Maximal degree in co-relation 28330. Up to 5770 conditions per place. [2024-06-27 19:09:25,026 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 197 selfloop transitions, 60 changer transitions 0/266 dead transitions. [2024-06-27 19:09:25,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 266 transitions, 2541 flow [2024-06-27 19:09:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:09:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:09:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-27 19:09:25,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203094777562862 [2024-06-27 19:09:25,028 INFO L175 Difference]: Start difference. First operand has 110 places, 164 transitions, 1422 flow. Second operand 11 states and 269 transitions. [2024-06-27 19:09:25,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 266 transitions, 2541 flow [2024-06-27 19:09:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 266 transitions, 2515 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:25,078 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 1876 flow [2024-06-27 19:09:25,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1876, PETRI_PLACES=123, PETRI_TRANSITIONS=200} [2024-06-27 19:09:25,079 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-27 19:09:25,079 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 1876 flow [2024-06-27 19:09:25,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:25,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:25,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:25,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:09:25,079 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:25,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1294879034, now seen corresponding path program 2 times [2024-06-27 19:09:25,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:25,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250565764] [2024-06-27 19:09:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:25,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:25,595 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 19:09:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250565764] [2024-06-27 19:09:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250565764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154904225] [2024-06-27 19:09:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:25,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:25,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 200 transitions, 1876 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:25,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:25,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:25,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:26,616 INFO L124 PetriNetUnfolderBase]: 4162/6599 cut-off events. [2024-06-27 19:09:26,616 INFO L125 PetriNetUnfolderBase]: For 56427/56427 co-relation queries the response was YES. [2024-06-27 19:09:26,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29942 conditions, 6599 events. 4162/6599 cut-off events. For 56427/56427 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 40036 event pairs, 1563 based on Foata normal form. 6/6417 useless extension candidates. Maximal degree in co-relation 29889. Up to 5757 conditions per place. [2024-06-27 19:09:26,669 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 181 selfloop transitions, 58 changer transitions 0/248 dead transitions. [2024-06-27 19:09:26,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 248 transitions, 2579 flow [2024-06-27 19:09:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:09:26,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:09:26,671 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 1876 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:09:26,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 248 transitions, 2579 flow [2024-06-27 19:09:26,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 248 transitions, 2375 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:26,731 INFO L231 Difference]: Finished difference. Result has 128 places, 203 transitions, 1851 flow [2024-06-27 19:09:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1851, PETRI_PLACES=128, PETRI_TRANSITIONS=203} [2024-06-27 19:09:26,732 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-27 19:09:26,732 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 203 transitions, 1851 flow [2024-06-27 19:09:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:09:26,733 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2009001434, now seen corresponding path program 3 times [2024-06-27 19:09:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039401618] [2024-06-27 19:09:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:27,244 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 19:09:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039401618] [2024-06-27 19:09:27,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039401618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:27,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:27,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441303268] [2024-06-27 19:09:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:27,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:27,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 203 transitions, 1851 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:27,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:27,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:27,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:28,354 INFO L124 PetriNetUnfolderBase]: 4256/6779 cut-off events. [2024-06-27 19:09:28,355 INFO L125 PetriNetUnfolderBase]: For 59148/59148 co-relation queries the response was YES. [2024-06-27 19:09:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30961 conditions, 6779 events. 4256/6779 cut-off events. For 59148/59148 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 41452 event pairs, 1397 based on Foata normal form. 4/6594 useless extension candidates. Maximal degree in co-relation 30906. Up to 5355 conditions per place. [2024-06-27 19:09:28,407 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 150 selfloop transitions, 113 changer transitions 0/272 dead transitions. [2024-06-27 19:09:28,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 272 transitions, 2915 flow [2024-06-27 19:09:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:09:28,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 19:09:28,408 INFO L175 Difference]: Start difference. First operand has 128 places, 203 transitions, 1851 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:09:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 272 transitions, 2915 flow [2024-06-27 19:09:28,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 272 transitions, 2789 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:28,459 INFO L231 Difference]: Finished difference. Result has 132 places, 220 transitions, 2238 flow [2024-06-27 19:09:28,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2238, PETRI_PLACES=132, PETRI_TRANSITIONS=220} [2024-06-27 19:09:28,460 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-27 19:09:28,460 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 220 transitions, 2238 flow [2024-06-27 19:09:28,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:28,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:28,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:28,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:09:28,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:28,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1638472966, now seen corresponding path program 4 times [2024-06-27 19:09:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:28,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750044707] [2024-06-27 19:09:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:28,965 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 19:09:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750044707] [2024-06-27 19:09:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750044707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:28,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:28,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511038204] [2024-06-27 19:09:28,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:28,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:28,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:28,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:29,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:29,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 220 transitions, 2238 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:29,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:29,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:29,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:30,172 INFO L124 PetriNetUnfolderBase]: 4246/6762 cut-off events. [2024-06-27 19:09:30,172 INFO L125 PetriNetUnfolderBase]: For 63599/63599 co-relation queries the response was YES. [2024-06-27 19:09:30,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32214 conditions, 6762 events. 4246/6762 cut-off events. For 63599/63599 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 41435 event pairs, 1366 based on Foata normal form. 4/6575 useless extension candidates. Maximal degree in co-relation 32157. Up to 5347 conditions per place. [2024-06-27 19:09:30,227 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 150 selfloop transitions, 115 changer transitions 0/274 dead transitions. [2024-06-27 19:09:30,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 274 transitions, 3076 flow [2024-06-27 19:09:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:09:30,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:09:30,228 INFO L175 Difference]: Start difference. First operand has 132 places, 220 transitions, 2238 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:09:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 274 transitions, 3076 flow [2024-06-27 19:09:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 274 transitions, 2917 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:30,286 INFO L231 Difference]: Finished difference. Result has 137 places, 221 transitions, 2331 flow [2024-06-27 19:09:30,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=137, PETRI_TRANSITIONS=221} [2024-06-27 19:09:30,286 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-27 19:09:30,287 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 221 transitions, 2331 flow [2024-06-27 19:09:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:30,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:30,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:30,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:09:30,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:30,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1996991624, now seen corresponding path program 1 times [2024-06-27 19:09:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666077681] [2024-06-27 19:09:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:30,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:31,032 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 19:09:31,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:31,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666077681] [2024-06-27 19:09:31,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666077681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:31,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:31,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:31,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055229078] [2024-06-27 19:09:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:31,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:31,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:31,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:31,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 221 transitions, 2331 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:31,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:31,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:31,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:32,198 INFO L124 PetriNetUnfolderBase]: 4280/6815 cut-off events. [2024-06-27 19:09:32,198 INFO L125 PetriNetUnfolderBase]: For 67177/67177 co-relation queries the response was YES. [2024-06-27 19:09:32,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32945 conditions, 6815 events. 4280/6815 cut-off events. For 67177/67177 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 41734 event pairs, 1426 based on Foata normal form. 4/6628 useless extension candidates. Maximal degree in co-relation 32886. Up to 5746 conditions per place. [2024-06-27 19:09:32,249 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 190 selfloop transitions, 74 changer transitions 0/273 dead transitions. [2024-06-27 19:09:32,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 273 transitions, 3118 flow [2024-06-27 19:09:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:09:32,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-06-27 19:09:32,251 INFO L175 Difference]: Start difference. First operand has 137 places, 221 transitions, 2331 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:09:32,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 273 transitions, 3118 flow [2024-06-27 19:09:32,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 273 transitions, 2968 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:32,322 INFO L231 Difference]: Finished difference. Result has 141 places, 224 transitions, 2387 flow [2024-06-27 19:09:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2387, PETRI_PLACES=141, PETRI_TRANSITIONS=224} [2024-06-27 19:09:32,323 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-06-27 19:09:32,323 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 224 transitions, 2387 flow [2024-06-27 19:09:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:09:32,323 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1892541781, now seen corresponding path program 1 times [2024-06-27 19:09:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537031016] [2024-06-27 19:09:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:32,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537031016] [2024-06-27 19:09:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537031016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:32,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:32,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:32,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903454863] [2024-06-27 19:09:32,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:32,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:09:32,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 224 transitions, 2387 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:32,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:32,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:09:32,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:33,657 INFO L124 PetriNetUnfolderBase]: 4019/6549 cut-off events. [2024-06-27 19:09:33,657 INFO L125 PetriNetUnfolderBase]: For 73130/73161 co-relation queries the response was YES. [2024-06-27 19:09:33,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 6549 events. 4019/6549 cut-off events. For 73130/73161 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 40822 event pairs, 1553 based on Foata normal form. 9/6324 useless extension candidates. Maximal degree in co-relation 32059. Up to 5601 conditions per place. [2024-06-27 19:09:33,717 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 204 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-27 19:09:33,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 252 transitions, 2979 flow [2024-06-27 19:09:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:09:33,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:09:33,719 INFO L175 Difference]: Start difference. First operand has 141 places, 224 transitions, 2387 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:09:33,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 252 transitions, 2979 flow [2024-06-27 19:09:33,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 252 transitions, 2801 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:33,797 INFO L231 Difference]: Finished difference. Result has 141 places, 227 transitions, 2294 flow [2024-06-27 19:09:33,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2294, PETRI_PLACES=141, PETRI_TRANSITIONS=227} [2024-06-27 19:09:33,798 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-06-27 19:09:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 227 transitions, 2294 flow [2024-06-27 19:09:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:09:33,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:33,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1029469304, now seen corresponding path program 5 times [2024-06-27 19:09:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544200950] [2024-06-27 19:09:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:34,338 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 19:09:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544200950] [2024-06-27 19:09:34,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544200950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:34,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:34,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:34,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733617770] [2024-06-27 19:09:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:34,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:34,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 227 transitions, 2294 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:34,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:34,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:35,468 INFO L124 PetriNetUnfolderBase]: 4362/6933 cut-off events. [2024-06-27 19:09:35,468 INFO L125 PetriNetUnfolderBase]: For 77814/77814 co-relation queries the response was YES. [2024-06-27 19:09:35,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34116 conditions, 6933 events. 4362/6933 cut-off events. For 77814/77814 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 42689 event pairs, 1320 based on Foata normal form. 4/6743 useless extension candidates. Maximal degree in co-relation 34055. Up to 5487 conditions per place. [2024-06-27 19:09:35,530 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 152 selfloop transitions, 121 changer transitions 0/282 dead transitions. [2024-06-27 19:09:35,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 282 transitions, 3217 flow [2024-06-27 19:09:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:09:35,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-06-27 19:09:35,531 INFO L175 Difference]: Start difference. First operand has 141 places, 227 transitions, 2294 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:09:35,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 282 transitions, 3217 flow [2024-06-27 19:09:35,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 282 transitions, 3165 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:35,614 INFO L231 Difference]: Finished difference. Result has 146 places, 233 transitions, 2626 flow [2024-06-27 19:09:35,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2626, PETRI_PLACES=146, PETRI_TRANSITIONS=233} [2024-06-27 19:09:35,614 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 93 predicate places. [2024-06-27 19:09:35,614 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 233 transitions, 2626 flow [2024-06-27 19:09:35,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:35,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:35,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:09:35,615 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:35,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash 772968794, now seen corresponding path program 6 times [2024-06-27 19:09:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560087942] [2024-06-27 19:09:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:36,166 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 19:09:36,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560087942] [2024-06-27 19:09:36,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560087942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:36,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:36,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467836616] [2024-06-27 19:09:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:36,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:36,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 233 transitions, 2626 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:36,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:36,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:36,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:37,390 INFO L124 PetriNetUnfolderBase]: 4404/6999 cut-off events. [2024-06-27 19:09:37,390 INFO L125 PetriNetUnfolderBase]: For 85328/85328 co-relation queries the response was YES. [2024-06-27 19:09:37,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35536 conditions, 6999 events. 4404/6999 cut-off events. For 85328/85328 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 43057 event pairs, 1348 based on Foata normal form. 4/6809 useless extension candidates. Maximal degree in co-relation 35474. Up to 5523 conditions per place. [2024-06-27 19:09:37,453 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 157 selfloop transitions, 120 changer transitions 0/286 dead transitions. [2024-06-27 19:09:37,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 286 transitions, 3552 flow [2024-06-27 19:09:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:09:37,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 19:09:37,454 INFO L175 Difference]: Start difference. First operand has 146 places, 233 transitions, 2626 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:09:37,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 286 transitions, 3552 flow [2024-06-27 19:09:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 286 transitions, 3344 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:37,557 INFO L231 Difference]: Finished difference. Result has 150 places, 237 transitions, 2744 flow [2024-06-27 19:09:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2744, PETRI_PLACES=150, PETRI_TRANSITIONS=237} [2024-06-27 19:09:37,558 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-27 19:09:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 237 transitions, 2744 flow [2024-06-27 19:09:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:37,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:37,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:09:37,558 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:37,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1166267160, now seen corresponding path program 7 times [2024-06-27 19:09:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:37,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115183674] [2024-06-27 19:09:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:38,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115183674] [2024-06-27 19:09:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115183674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:38,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462588259] [2024-06-27 19:09:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:38,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:38,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 237 transitions, 2744 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:38,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:38,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:38,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:39,247 INFO L124 PetriNetUnfolderBase]: 4394/6989 cut-off events. [2024-06-27 19:09:39,248 INFO L125 PetriNetUnfolderBase]: For 88044/88044 co-relation queries the response was YES. [2024-06-27 19:09:39,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35339 conditions, 6989 events. 4394/6989 cut-off events. For 88044/88044 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 42993 event pairs, 1358 based on Foata normal form. 4/6799 useless extension candidates. Maximal degree in co-relation 35276. Up to 5515 conditions per place. [2024-06-27 19:09:39,312 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 149 selfloop transitions, 123 changer transitions 0/281 dead transitions. [2024-06-27 19:09:39,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 281 transitions, 3478 flow [2024-06-27 19:09:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:09:39,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-06-27 19:09:39,313 INFO L175 Difference]: Start difference. First operand has 150 places, 237 transitions, 2744 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:09:39,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 281 transitions, 3478 flow [2024-06-27 19:09:39,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 281 transitions, 3036 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:09:39,435 INFO L231 Difference]: Finished difference. Result has 151 places, 237 transitions, 2557 flow [2024-06-27 19:09:39,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2557, PETRI_PLACES=151, PETRI_TRANSITIONS=237} [2024-06-27 19:09:39,436 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-06-27 19:09:39,436 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 237 transitions, 2557 flow [2024-06-27 19:09:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:39,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:09:39,436 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:39,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 772976730, now seen corresponding path program 2 times [2024-06-27 19:09:39,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:39,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850498810] [2024-06-27 19:09:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:39,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:40,168 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 19:09:40,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850498810] [2024-06-27 19:09:40,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850498810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:40,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:40,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076574102] [2024-06-27 19:09:40,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:40,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:40,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:40,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:40,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 237 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:40,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:40,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:41,428 INFO L124 PetriNetUnfolderBase]: 4428/7042 cut-off events. [2024-06-27 19:09:41,428 INFO L125 PetriNetUnfolderBase]: For 88220/88220 co-relation queries the response was YES. [2024-06-27 19:09:41,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35494 conditions, 7042 events. 4428/7042 cut-off events. For 88220/88220 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 43207 event pairs, 1407 based on Foata normal form. 4/6854 useless extension candidates. Maximal degree in co-relation 35430. Up to 5960 conditions per place. [2024-06-27 19:09:41,485 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 204 selfloop transitions, 73 changer transitions 0/286 dead transitions. [2024-06-27 19:09:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 286 transitions, 3358 flow [2024-06-27 19:09:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:09:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:09:41,486 INFO L175 Difference]: Start difference. First operand has 151 places, 237 transitions, 2557 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:09:41,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 286 transitions, 3358 flow [2024-06-27 19:09:41,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 286 transitions, 3111 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:41,595 INFO L231 Difference]: Finished difference. Result has 153 places, 240 transitions, 2519 flow [2024-06-27 19:09:41,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2519, PETRI_PLACES=153, PETRI_TRANSITIONS=240} [2024-06-27 19:09:41,596 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-06-27 19:09:41,596 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 240 transitions, 2519 flow [2024-06-27 19:09:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:41,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:41,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:09:41,597 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:41,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1029736710, now seen corresponding path program 3 times [2024-06-27 19:09:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694940433] [2024-06-27 19:09:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:42,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:42,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694940433] [2024-06-27 19:09:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694940433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:42,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092222466] [2024-06-27 19:09:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:42,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 240 transitions, 2519 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:42,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:42,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:43,546 INFO L124 PetriNetUnfolderBase]: 4462/7101 cut-off events. [2024-06-27 19:09:43,547 INFO L125 PetriNetUnfolderBase]: For 96092/96092 co-relation queries the response was YES. [2024-06-27 19:09:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36389 conditions, 7101 events. 4462/7101 cut-off events. For 96092/96092 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 43684 event pairs, 1398 based on Foata normal form. 4/6911 useless extension candidates. Maximal degree in co-relation 36324. Up to 6010 conditions per place. [2024-06-27 19:09:43,614 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 205 selfloop transitions, 75 changer transitions 0/289 dead transitions. [2024-06-27 19:09:43,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 289 transitions, 3338 flow [2024-06-27 19:09:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:09:43,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:09:43,616 INFO L175 Difference]: Start difference. First operand has 153 places, 240 transitions, 2519 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:09:43,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 289 transitions, 3338 flow [2024-06-27 19:09:43,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 289 transitions, 3153 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:43,738 INFO L231 Difference]: Finished difference. Result has 155 places, 243 transitions, 2553 flow [2024-06-27 19:09:43,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2553, PETRI_PLACES=155, PETRI_TRANSITIONS=243} [2024-06-27 19:09:43,738 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 102 predicate places. [2024-06-27 19:09:43,739 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 243 transitions, 2553 flow [2024-06-27 19:09:43,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:43,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:43,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:09:43,739 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:43,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash -605586196, now seen corresponding path program 4 times [2024-06-27 19:09:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:43,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604953222] [2024-06-27 19:09:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:44,467 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 19:09:44,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:44,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604953222] [2024-06-27 19:09:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604953222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:44,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387857848] [2024-06-27 19:09:44,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:44,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:44,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 243 transitions, 2553 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:44,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:44,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:44,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:45,742 INFO L124 PetriNetUnfolderBase]: 4454/6909 cut-off events. [2024-06-27 19:09:45,742 INFO L125 PetriNetUnfolderBase]: For 102004/102004 co-relation queries the response was YES. [2024-06-27 19:09:45,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36681 conditions, 6909 events. 4454/6909 cut-off events. For 102004/102004 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 41741 event pairs, 1318 based on Foata normal form. 4/6779 useless extension candidates. Maximal degree in co-relation 36615. Up to 5850 conditions per place. [2024-06-27 19:09:45,800 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 196 selfloop transitions, 86 changer transitions 0/291 dead transitions. [2024-06-27 19:09:45,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 291 transitions, 3378 flow [2024-06-27 19:09:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:09:45,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:09:45,802 INFO L175 Difference]: Start difference. First operand has 155 places, 243 transitions, 2553 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:09:45,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 291 transitions, 3378 flow [2024-06-27 19:09:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 291 transitions, 3185 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:45,950 INFO L231 Difference]: Finished difference. Result has 157 places, 246 transitions, 2606 flow [2024-06-27 19:09:45,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2606, PETRI_PLACES=157, PETRI_TRANSITIONS=246} [2024-06-27 19:09:45,951 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-06-27 19:09:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 246 transitions, 2606 flow [2024-06-27 19:09:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:45,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:45,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:45,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:09:45,952 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:45,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1904951701, now seen corresponding path program 2 times [2024-06-27 19:09:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047526534] [2024-06-27 19:09:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:46,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047526534] [2024-06-27 19:09:46,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047526534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:46,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:46,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124753341] [2024-06-27 19:09:46,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:46,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:46,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:09:46,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 246 transitions, 2606 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:46,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:46,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:09:46,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:47,265 INFO L124 PetriNetUnfolderBase]: 4116/6517 cut-off events. [2024-06-27 19:09:47,265 INFO L125 PetriNetUnfolderBase]: For 102703/102750 co-relation queries the response was YES. [2024-06-27 19:09:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34429 conditions, 6517 events. 4116/6517 cut-off events. For 102703/102750 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 39661 event pairs, 1556 based on Foata normal form. 15/6343 useless extension candidates. Maximal degree in co-relation 34362. Up to 5650 conditions per place. [2024-06-27 19:09:47,329 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 210 selfloop transitions, 28 changer transitions 0/269 dead transitions. [2024-06-27 19:09:47,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 269 transitions, 3208 flow [2024-06-27 19:09:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:09:47,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:09:47,330 INFO L175 Difference]: Start difference. First operand has 157 places, 246 transitions, 2606 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:09:47,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 269 transitions, 3208 flow [2024-06-27 19:09:47,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 269 transitions, 2976 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:47,490 INFO L231 Difference]: Finished difference. Result has 157 places, 246 transitions, 2438 flow [2024-06-27 19:09:47,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2438, PETRI_PLACES=157, PETRI_TRANSITIONS=246} [2024-06-27 19:09:47,491 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-06-27 19:09:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 246 transitions, 2438 flow [2024-06-27 19:09:47,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:47,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:47,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:47,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:09:47,491 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:47,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1606697907, now seen corresponding path program 1 times [2024-06-27 19:09:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:47,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452613309] [2024-06-27 19:09:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:47,896 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 19:09:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452613309] [2024-06-27 19:09:47,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452613309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:47,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:47,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033726835] [2024-06-27 19:09:47,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:47,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:47,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:47,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:47,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 246 transitions, 2438 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:47,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:47,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:47,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:48,912 INFO L124 PetriNetUnfolderBase]: 4458/6892 cut-off events. [2024-06-27 19:09:48,913 INFO L125 PetriNetUnfolderBase]: For 108156/108156 co-relation queries the response was YES. [2024-06-27 19:09:48,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36788 conditions, 6892 events. 4458/6892 cut-off events. For 108156/108156 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 41071 event pairs, 1622 based on Foata normal form. 1/6763 useless extension candidates. Maximal degree in co-relation 36720. Up to 6334 conditions per place. [2024-06-27 19:09:48,984 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 252 selfloop transitions, 13 changer transitions 0/274 dead transitions. [2024-06-27 19:09:48,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 274 transitions, 3147 flow [2024-06-27 19:09:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 19:09:48,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2024-06-27 19:09:48,986 INFO L175 Difference]: Start difference. First operand has 157 places, 246 transitions, 2438 flow. Second operand 6 states and 136 transitions. [2024-06-27 19:09:48,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 274 transitions, 3147 flow [2024-06-27 19:09:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 3072 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:49,147 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 2491 flow [2024-06-27 19:09:49,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2491, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-27 19:09:49,147 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-27 19:09:49,147 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 2491 flow [2024-06-27 19:09:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:49,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:49,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:49,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:09:49,148 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:49,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1904958645, now seen corresponding path program 2 times [2024-06-27 19:09:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:49,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614933271] [2024-06-27 19:09:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:49,555 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 19:09:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:49,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614933271] [2024-06-27 19:09:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614933271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:49,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930358703] [2024-06-27 19:09:49,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:49,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:49,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:49,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 2491 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:49,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:49,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:49,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:50,510 INFO L124 PetriNetUnfolderBase]: 4463/6909 cut-off events. [2024-06-27 19:09:50,510 INFO L125 PetriNetUnfolderBase]: For 114120/114126 co-relation queries the response was YES. [2024-06-27 19:09:50,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37642 conditions, 6909 events. 4463/6909 cut-off events. For 114120/114126 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 41321 event pairs, 1604 based on Foata normal form. 7/6786 useless extension candidates. Maximal degree in co-relation 37572. Up to 6318 conditions per place. [2024-06-27 19:09:50,566 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 250 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-06-27 19:09:50,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 277 transitions, 3181 flow [2024-06-27 19:09:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 19:09:50,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858156028368794 [2024-06-27 19:09:50,567 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 2491 flow. Second operand 6 states and 137 transitions. [2024-06-27 19:09:50,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 277 transitions, 3181 flow [2024-06-27 19:09:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 277 transitions, 3138 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:50,709 INFO L231 Difference]: Finished difference. Result has 162 places, 256 transitions, 2532 flow [2024-06-27 19:09:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2532, PETRI_PLACES=162, PETRI_TRANSITIONS=256} [2024-06-27 19:09:50,709 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 109 predicate places. [2024-06-27 19:09:50,709 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 256 transitions, 2532 flow [2024-06-27 19:09:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:50,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:50,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:50,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:09:50,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:50,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1904967573, now seen corresponding path program 1 times [2024-06-27 19:09:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165697725] [2024-06-27 19:09:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:51,364 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 19:09:51,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:51,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165697725] [2024-06-27 19:09:51,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165697725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:51,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:51,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:51,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187246590] [2024-06-27 19:09:51,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:51,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:51,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:51,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:09:51,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 256 transitions, 2532 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:51,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:51,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:09:51,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:52,310 INFO L124 PetriNetUnfolderBase]: 4190/6610 cut-off events. [2024-06-27 19:09:52,310 INFO L125 PetriNetUnfolderBase]: For 116156/116205 co-relation queries the response was YES. [2024-06-27 19:09:52,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36326 conditions, 6610 events. 4190/6610 cut-off events. For 116156/116205 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 40199 event pairs, 1535 based on Foata normal form. 14/6433 useless extension candidates. Maximal degree in co-relation 36255. Up to 5696 conditions per place. [2024-06-27 19:09:52,385 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 224 selfloop transitions, 34 changer transitions 0/289 dead transitions. [2024-06-27 19:09:52,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 289 transitions, 3264 flow [2024-06-27 19:09:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:09:52,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 19:09:52,386 INFO L175 Difference]: Start difference. First operand has 162 places, 256 transitions, 2532 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:09:52,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 289 transitions, 3264 flow [2024-06-27 19:09:52,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 289 transitions, 3204 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:52,531 INFO L231 Difference]: Finished difference. Result has 165 places, 261 transitions, 2622 flow [2024-06-27 19:09:52,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=165, PETRI_TRANSITIONS=261} [2024-06-27 19:09:52,532 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-27 19:09:52,532 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 261 transitions, 2622 flow [2024-06-27 19:09:52,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:52,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:52,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:52,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:09:52,533 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:52,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash 367931070, now seen corresponding path program 1 times [2024-06-27 19:09:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287055388] [2024-06-27 19:09:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:53,091 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 19:09:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287055388] [2024-06-27 19:09:53,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287055388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:53,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:53,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026873324] [2024-06-27 19:09:53,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:53,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:53,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 261 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:54,365 INFO L124 PetriNetUnfolderBase]: 4600/7304 cut-off events. [2024-06-27 19:09:54,365 INFO L125 PetriNetUnfolderBase]: For 134583/134583 co-relation queries the response was YES. [2024-06-27 19:09:54,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41570 conditions, 7304 events. 4600/7304 cut-off events. For 134583/134583 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 44881 event pairs, 1187 based on Foata normal form. 4/7112 useless extension candidates. Maximal degree in co-relation 41498. Up to 6275 conditions per place. [2024-06-27 19:09:54,438 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 263 selfloop transitions, 56 changer transitions 0/328 dead transitions. [2024-06-27 19:09:54,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 328 transitions, 3759 flow [2024-06-27 19:09:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:09:54,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:09:54,439 INFO L175 Difference]: Start difference. First operand has 165 places, 261 transitions, 2622 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:09:54,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 328 transitions, 3759 flow [2024-06-27 19:09:54,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 328 transitions, 3651 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:54,624 INFO L231 Difference]: Finished difference. Result has 169 places, 265 transitions, 2735 flow [2024-06-27 19:09:54,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2735, PETRI_PLACES=169, PETRI_TRANSITIONS=265} [2024-06-27 19:09:54,624 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 116 predicate places. [2024-06-27 19:09:54,624 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 265 transitions, 2735 flow [2024-06-27 19:09:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:54,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:54,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:09:54,625 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:54,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash 459582078, now seen corresponding path program 2 times [2024-06-27 19:09:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252013067] [2024-06-27 19:09:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:55,160 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 19:09:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252013067] [2024-06-27 19:09:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252013067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:55,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:55,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110061432] [2024-06-27 19:09:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:55,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 265 transitions, 2735 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:55,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:55,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:56,455 INFO L124 PetriNetUnfolderBase]: 4592/7290 cut-off events. [2024-06-27 19:09:56,456 INFO L125 PetriNetUnfolderBase]: For 140656/140656 co-relation queries the response was YES. [2024-06-27 19:09:56,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41712 conditions, 7290 events. 4592/7290 cut-off events. For 140656/140656 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 44822 event pairs, 1511 based on Foata normal form. 4/7096 useless extension candidates. Maximal degree in co-relation 41639. Up to 6376 conditions per place. [2024-06-27 19:09:56,520 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 52 changer transitions 0/316 dead transitions. [2024-06-27 19:09:56,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 316 transitions, 3578 flow [2024-06-27 19:09:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:09:56,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-06-27 19:09:56,521 INFO L175 Difference]: Start difference. First operand has 169 places, 265 transitions, 2735 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:09:56,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 316 transitions, 3578 flow [2024-06-27 19:09:56,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 3462 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:56,719 INFO L231 Difference]: Finished difference. Result has 172 places, 265 transitions, 2733 flow [2024-06-27 19:09:56,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2733, PETRI_PLACES=172, PETRI_TRANSITIONS=265} [2024-06-27 19:09:56,720 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 119 predicate places. [2024-06-27 19:09:56,720 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 265 transitions, 2733 flow [2024-06-27 19:09:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:56,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:56,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:09:56,721 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:56,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 740512382, now seen corresponding path program 3 times [2024-06-27 19:09:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508686206] [2024-06-27 19:09:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:57,253 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 19:09:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:57,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508686206] [2024-06-27 19:09:57,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508686206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:57,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:57,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350765173] [2024-06-27 19:09:57,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:57,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 265 transitions, 2733 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:57,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:57,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:58,567 INFO L124 PetriNetUnfolderBase]: 4634/7352 cut-off events. [2024-06-27 19:09:58,567 INFO L125 PetriNetUnfolderBase]: For 147129/147135 co-relation queries the response was YES. [2024-06-27 19:09:58,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42186 conditions, 7352 events. 4634/7352 cut-off events. For 147129/147135 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 45277 event pairs, 1489 based on Foata normal form. 10/7162 useless extension candidates. Maximal degree in co-relation 42111. Up to 6309 conditions per place. [2024-06-27 19:09:58,649 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 227 selfloop transitions, 83 changer transitions 0/319 dead transitions. [2024-06-27 19:09:58,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 319 transitions, 3651 flow [2024-06-27 19:09:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:09:58,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 19:09:58,650 INFO L175 Difference]: Start difference. First operand has 172 places, 265 transitions, 2733 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:09:58,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 319 transitions, 3651 flow [2024-06-27 19:09:58,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 319 transitions, 3538 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:09:58,837 INFO L231 Difference]: Finished difference. Result has 173 places, 267 transitions, 2850 flow [2024-06-27 19:09:58,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=173, PETRI_TRANSITIONS=267} [2024-06-27 19:09:58,838 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-27 19:09:58,838 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 267 transitions, 2850 flow [2024-06-27 19:09:58,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:58,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:58,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:58,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:09:58,838 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:58,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 316479648, now seen corresponding path program 4 times [2024-06-27 19:09:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:58,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650200832] [2024-06-27 19:09:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:59,386 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 19:09:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650200832] [2024-06-27 19:09:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650200832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:59,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233984167] [2024-06-27 19:09:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:59,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:09:59,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 267 transitions, 2850 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:59,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:59,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:09:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:00,610 INFO L124 PetriNetUnfolderBase]: 4626/7174 cut-off events. [2024-06-27 19:10:00,610 INFO L125 PetriNetUnfolderBase]: For 153660/153660 co-relation queries the response was YES. [2024-06-27 19:10:00,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42448 conditions, 7174 events. 4626/7174 cut-off events. For 153660/153660 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43207 event pairs, 1489 based on Foata normal form. 4/7026 useless extension candidates. Maximal degree in co-relation 42372. Up to 6297 conditions per place. [2024-06-27 19:10:00,675 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 229 selfloop transitions, 82 changer transitions 0/320 dead transitions. [2024-06-27 19:10:00,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 320 transitions, 3772 flow [2024-06-27 19:10:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:10:00,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 19:10:00,677 INFO L175 Difference]: Start difference. First operand has 173 places, 267 transitions, 2850 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:10:00,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 320 transitions, 3772 flow [2024-06-27 19:10:00,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 320 transitions, 3578 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:00,895 INFO L231 Difference]: Finished difference. Result has 175 places, 269 transitions, 2888 flow [2024-06-27 19:10:00,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2888, PETRI_PLACES=175, PETRI_TRANSITIONS=269} [2024-06-27 19:10:00,896 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 122 predicate places. [2024-06-27 19:10:00,896 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 269 transitions, 2888 flow [2024-06-27 19:10:00,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:00,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:00,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:00,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:10:00,896 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:00,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1253998124, now seen corresponding path program 1 times [2024-06-27 19:10:00,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:00,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308646686] [2024-06-27 19:10:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:00,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:01,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308646686] [2024-06-27 19:10:01,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308646686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:01,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:01,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811575304] [2024-06-27 19:10:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:01,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:01,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:01,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 269 transitions, 2888 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:01,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:01,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:01,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:02,437 INFO L124 PetriNetUnfolderBase]: 4659/7199 cut-off events. [2024-06-27 19:10:02,437 INFO L125 PetriNetUnfolderBase]: For 160076/160076 co-relation queries the response was YES. [2024-06-27 19:10:02,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42933 conditions, 7199 events. 4659/7199 cut-off events. For 160076/160076 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 43044 event pairs, 1493 based on Foata normal form. 2/7061 useless extension candidates. Maximal degree in co-relation 42856. Up to 6578 conditions per place. [2024-06-27 19:10:02,506 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 268 selfloop transitions, 29 changer transitions 0/306 dead transitions. [2024-06-27 19:10:02,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 306 transitions, 3699 flow [2024-06-27 19:10:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:10:02,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:10:02,508 INFO L175 Difference]: Start difference. First operand has 175 places, 269 transitions, 2888 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:10:02,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 306 transitions, 3699 flow [2024-06-27 19:10:02,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 3503 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:02,735 INFO L231 Difference]: Finished difference. Result has 177 places, 278 transitions, 2871 flow [2024-06-27 19:10:02,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2871, PETRI_PLACES=177, PETRI_TRANSITIONS=278} [2024-06-27 19:10:02,735 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 124 predicate places. [2024-06-27 19:10:02,735 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 278 transitions, 2871 flow [2024-06-27 19:10:02,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:02,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:02,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:02,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:10:02,736 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:02,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1731973440, now seen corresponding path program 2 times [2024-06-27 19:10:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135793186] [2024-06-27 19:10:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:02,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:03,161 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 19:10:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135793186] [2024-06-27 19:10:03,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135793186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:03,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:03,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334994367] [2024-06-27 19:10:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:03,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:03,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 278 transitions, 2871 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:03,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:03,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:03,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:04,201 INFO L124 PetriNetUnfolderBase]: 4713/7280 cut-off events. [2024-06-27 19:10:04,201 INFO L125 PetriNetUnfolderBase]: For 169317/169317 co-relation queries the response was YES. [2024-06-27 19:10:04,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44643 conditions, 7280 events. 4713/7280 cut-off events. For 169317/169317 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 43619 event pairs, 1486 based on Foata normal form. 2/7139 useless extension candidates. Maximal degree in co-relation 44564. Up to 6610 conditions per place. [2024-06-27 19:10:04,401 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 272 selfloop transitions, 37 changer transitions 0/318 dead transitions. [2024-06-27 19:10:04,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 318 transitions, 3863 flow [2024-06-27 19:10:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:10:04,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:10:04,402 INFO L175 Difference]: Start difference. First operand has 177 places, 278 transitions, 2871 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:10:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 318 transitions, 3863 flow [2024-06-27 19:10:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 318 transitions, 3774 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 19:10:04,605 INFO L231 Difference]: Finished difference. Result has 182 places, 290 transitions, 3066 flow [2024-06-27 19:10:04,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3066, PETRI_PLACES=182, PETRI_TRANSITIONS=290} [2024-06-27 19:10:04,605 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 129 predicate places. [2024-06-27 19:10:04,605 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 290 transitions, 3066 flow [2024-06-27 19:10:04,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:04,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:04,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:10:04,606 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:04,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1731973657, now seen corresponding path program 1 times [2024-06-27 19:10:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:04,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669070910] [2024-06-27 19:10:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:05,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669070910] [2024-06-27 19:10:05,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669070910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:05,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:05,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:05,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236179567] [2024-06-27 19:10:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:05,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:05,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 290 transitions, 3066 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:05,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:05,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:05,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:06,071 INFO L124 PetriNetUnfolderBase]: 4801/7403 cut-off events. [2024-06-27 19:10:06,072 INFO L125 PetriNetUnfolderBase]: For 184858/184858 co-relation queries the response was YES. [2024-06-27 19:10:06,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46855 conditions, 7403 events. 4801/7403 cut-off events. For 184858/184858 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 44381 event pairs, 1450 based on Foata normal form. 2/7258 useless extension candidates. Maximal degree in co-relation 46774. Up to 6663 conditions per place. [2024-06-27 19:10:06,151 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 298 selfloop transitions, 41 changer transitions 0/348 dead transitions. [2024-06-27 19:10:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 348 transitions, 4392 flow [2024-06-27 19:10:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:10:06,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:10:06,153 INFO L175 Difference]: Start difference. First operand has 182 places, 290 transitions, 3066 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:10:06,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 348 transitions, 4392 flow [2024-06-27 19:10:06,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 348 transitions, 4282 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 19:10:06,472 INFO L231 Difference]: Finished difference. Result has 189 places, 315 transitions, 3506 flow [2024-06-27 19:10:06,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3506, PETRI_PLACES=189, PETRI_TRANSITIONS=315} [2024-06-27 19:10:06,472 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-27 19:10:06,472 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 315 transitions, 3506 flow [2024-06-27 19:10:06,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:06,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:06,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:06,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:10:06,473 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:06,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1495715759, now seen corresponding path program 2 times [2024-06-27 19:10:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:06,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935161452] [2024-06-27 19:10:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:07,047 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 19:10:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935161452] [2024-06-27 19:10:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935161452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:07,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548152577] [2024-06-27 19:10:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:07,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:07,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:07,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 315 transitions, 3506 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:07,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:07,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:07,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:08,226 INFO L124 PetriNetUnfolderBase]: 4888/7559 cut-off events. [2024-06-27 19:10:08,226 INFO L125 PetriNetUnfolderBase]: For 203415/203423 co-relation queries the response was YES. [2024-06-27 19:10:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49770 conditions, 7559 events. 4888/7559 cut-off events. For 203415/203423 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 45651 event pairs, 1435 based on Foata normal form. 10/7412 useless extension candidates. Maximal degree in co-relation 49684. Up to 6573 conditions per place. [2024-06-27 19:10:08,313 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 298 selfloop transitions, 59 changer transitions 0/366 dead transitions. [2024-06-27 19:10:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 366 transitions, 4845 flow [2024-06-27 19:10:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:10:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 19:10:08,315 INFO L175 Difference]: Start difference. First operand has 189 places, 315 transitions, 3506 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:10:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 366 transitions, 4845 flow [2024-06-27 19:10:08,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 366 transitions, 4787 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 19:10:08,722 INFO L231 Difference]: Finished difference. Result has 197 places, 332 transitions, 3881 flow [2024-06-27 19:10:08,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3881, PETRI_PLACES=197, PETRI_TRANSITIONS=332} [2024-06-27 19:10:08,723 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 144 predicate places. [2024-06-27 19:10:08,723 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 332 transitions, 3881 flow [2024-06-27 19:10:08,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:08,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:08,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:10:08,723 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:08,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1736643900, now seen corresponding path program 3 times [2024-06-27 19:10:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:08,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040046318] [2024-06-27 19:10:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:09,181 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 19:10:09,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:09,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040046318] [2024-06-27 19:10:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040046318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:09,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:09,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104266849] [2024-06-27 19:10:09,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:09,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:09,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:09,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:09,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 332 transitions, 3881 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:09,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:09,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:09,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:10,409 INFO L124 PetriNetUnfolderBase]: 4882/7580 cut-off events. [2024-06-27 19:10:10,409 INFO L125 PetriNetUnfolderBase]: For 217442/217444 co-relation queries the response was YES. [2024-06-27 19:10:10,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51435 conditions, 7580 events. 4882/7580 cut-off events. For 217442/217444 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 46075 event pairs, 1483 based on Foata normal form. 2/7420 useless extension candidates. Maximal degree in co-relation 51344. Up to 6801 conditions per place. [2024-06-27 19:10:10,485 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 316 selfloop transitions, 51 changer transitions 0/376 dead transitions. [2024-06-27 19:10:10,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 376 transitions, 5141 flow [2024-06-27 19:10:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:10:10,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-06-27 19:10:10,487 INFO L175 Difference]: Start difference. First operand has 197 places, 332 transitions, 3881 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:10:10,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 376 transitions, 5141 flow [2024-06-27 19:10:10,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 376 transitions, 5034 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:10,841 INFO L231 Difference]: Finished difference. Result has 204 places, 350 transitions, 4256 flow [2024-06-27 19:10:10,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4256, PETRI_PLACES=204, PETRI_TRANSITIONS=350} [2024-06-27 19:10:10,842 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 151 predicate places. [2024-06-27 19:10:10,842 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 350 transitions, 4256 flow [2024-06-27 19:10:10,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:10,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:10,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:10:10,843 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:10,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1075822927, now seen corresponding path program 3 times [2024-06-27 19:10:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253919201] [2024-06-27 19:10:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:10,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:11,306 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 19:10:11,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:11,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253919201] [2024-06-27 19:10:11,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253919201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:11,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:11,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597658506] [2024-06-27 19:10:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:11,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:11,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:11,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 350 transitions, 4256 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:12,660 INFO L124 PetriNetUnfolderBase]: 4878/7548 cut-off events. [2024-06-27 19:10:12,660 INFO L125 PetriNetUnfolderBase]: For 224247/224255 co-relation queries the response was YES. [2024-06-27 19:10:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51748 conditions, 7548 events. 4878/7548 cut-off events. For 224247/224255 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 45603 event pairs, 1432 based on Foata normal form. 10/7399 useless extension candidates. Maximal degree in co-relation 51653. Up to 6563 conditions per place. [2024-06-27 19:10:12,740 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 321 selfloop transitions, 58 changer transitions 0/388 dead transitions. [2024-06-27 19:10:12,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 388 transitions, 5506 flow [2024-06-27 19:10:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:10:12,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 19:10:12,741 INFO L175 Difference]: Start difference. First operand has 204 places, 350 transitions, 4256 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:10:12,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 388 transitions, 5506 flow [2024-06-27 19:10:13,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 388 transitions, 5280 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:13,078 INFO L231 Difference]: Finished difference. Result has 210 places, 354 transitions, 4259 flow [2024-06-27 19:10:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4259, PETRI_PLACES=210, PETRI_TRANSITIONS=354} [2024-06-27 19:10:13,078 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 157 predicate places. [2024-06-27 19:10:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 354 transitions, 4259 flow [2024-06-27 19:10:13,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:13,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:13,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:10:13,079 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:13,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:13,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1495725679, now seen corresponding path program 1 times [2024-06-27 19:10:13,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:13,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113010778] [2024-06-27 19:10:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:13,786 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 19:10:13,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:13,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113010778] [2024-06-27 19:10:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113010778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:13,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964866469] [2024-06-27 19:10:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:13,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:10:13,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 354 transitions, 4259 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:13,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:13,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:10:13,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:15,156 INFO L124 PetriNetUnfolderBase]: 4723/7574 cut-off events. [2024-06-27 19:10:15,156 INFO L125 PetriNetUnfolderBase]: For 231725/231765 co-relation queries the response was YES. [2024-06-27 19:10:15,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 7574 events. 4723/7574 cut-off events. For 231725/231765 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 47248 event pairs, 1405 based on Foata normal form. 16/7322 useless extension candidates. Maximal degree in co-relation 50674. Up to 6248 conditions per place. [2024-06-27 19:10:15,253 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 303 selfloop transitions, 77 changer transitions 0/425 dead transitions. [2024-06-27 19:10:15,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 425 transitions, 5710 flow [2024-06-27 19:10:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:10:15,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026595744680851 [2024-06-27 19:10:15,258 INFO L175 Difference]: Start difference. First operand has 210 places, 354 transitions, 4259 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:10:15,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 425 transitions, 5710 flow [2024-06-27 19:10:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 425 transitions, 5599 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:10:15,652 INFO L231 Difference]: Finished difference. Result has 217 places, 395 transitions, 4973 flow [2024-06-27 19:10:15,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=217, PETRI_TRANSITIONS=395} [2024-06-27 19:10:15,652 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 164 predicate places. [2024-06-27 19:10:15,652 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 395 transitions, 4973 flow [2024-06-27 19:10:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:15,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:15,653 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 19:10:15,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:10:15,653 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:15,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1914919521, now seen corresponding path program 1 times [2024-06-27 19:10:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:15,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73880995] [2024-06-27 19:10:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:15,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:16,236 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 19:10:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73880995] [2024-06-27 19:10:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73880995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:16,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:16,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139822566] [2024-06-27 19:10:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:16,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:16,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 395 transitions, 4973 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:16,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:16,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:16,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:17,926 INFO L124 PetriNetUnfolderBase]: 5310/8359 cut-off events. [2024-06-27 19:10:17,926 INFO L125 PetriNetUnfolderBase]: For 285739/285739 co-relation queries the response was YES. [2024-06-27 19:10:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59586 conditions, 8359 events. 5310/8359 cut-off events. For 285739/285739 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 52156 event pairs, 1204 based on Foata normal form. 16/8173 useless extension candidates. Maximal degree in co-relation 59485. Up to 6815 conditions per place. [2024-06-27 19:10:18,029 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 397 selfloop transitions, 68 changer transitions 0/474 dead transitions. [2024-06-27 19:10:18,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 474 transitions, 6612 flow [2024-06-27 19:10:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:10:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:10:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 19:10:18,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:10:18,031 INFO L175 Difference]: Start difference. First operand has 217 places, 395 transitions, 4973 flow. Second operand 10 states and 250 transitions. [2024-06-27 19:10:18,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 474 transitions, 6612 flow [2024-06-27 19:10:18,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 474 transitions, 6374 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:18,636 INFO L231 Difference]: Finished difference. Result has 227 places, 405 transitions, 5136 flow [2024-06-27 19:10:18,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5136, PETRI_PLACES=227, PETRI_TRANSITIONS=405} [2024-06-27 19:10:18,636 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 174 predicate places. [2024-06-27 19:10:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 405 transitions, 5136 flow [2024-06-27 19:10:18,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:18,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:18,637 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 19:10:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:10:18,637 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:18,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1362143325, now seen corresponding path program 2 times [2024-06-27 19:10:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441062968] [2024-06-27 19:10:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:19,229 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 19:10:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441062968] [2024-06-27 19:10:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441062968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:19,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:19,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006668878] [2024-06-27 19:10:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:19,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:19,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:19,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:19,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:19,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 405 transitions, 5136 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:19,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:19,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:21,036 INFO L124 PetriNetUnfolderBase]: 5430/8528 cut-off events. [2024-06-27 19:10:21,036 INFO L125 PetriNetUnfolderBase]: For 300901/300901 co-relation queries the response was YES. [2024-06-27 19:10:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61443 conditions, 8528 events. 5430/8528 cut-off events. For 300901/300901 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 53209 event pairs, 1519 based on Foata normal form. 16/8339 useless extension candidates. Maximal degree in co-relation 61338. Up to 7104 conditions per place. [2024-06-27 19:10:21,146 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 396 selfloop transitions, 64 changer transitions 0/469 dead transitions. [2024-06-27 19:10:21,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 469 transitions, 6612 flow [2024-06-27 19:10:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:10:21,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-06-27 19:10:21,147 INFO L175 Difference]: Start difference. First operand has 227 places, 405 transitions, 5136 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:10:21,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 469 transitions, 6612 flow [2024-06-27 19:10:21,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 469 transitions, 6443 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:21,787 INFO L231 Difference]: Finished difference. Result has 232 places, 409 transitions, 5229 flow [2024-06-27 19:10:21,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5229, PETRI_PLACES=232, PETRI_TRANSITIONS=409} [2024-06-27 19:10:21,788 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 179 predicate places. [2024-06-27 19:10:21,788 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 409 transitions, 5229 flow [2024-06-27 19:10:21,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:21,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:21,788 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 19:10:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:10:21,788 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:21,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1161784677, now seen corresponding path program 3 times [2024-06-27 19:10:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:21,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735962953] [2024-06-27 19:10:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:21,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:22,416 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 19:10:22,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:22,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735962953] [2024-06-27 19:10:22,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735962953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:22,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:22,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117340944] [2024-06-27 19:10:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:22,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:22,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:22,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:22,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:22,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 409 transitions, 5229 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:22,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:22,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:22,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:24,295 INFO L124 PetriNetUnfolderBase]: 5394/8474 cut-off events. [2024-06-27 19:10:24,295 INFO L125 PetriNetUnfolderBase]: For 294152/294152 co-relation queries the response was YES. [2024-06-27 19:10:24,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60112 conditions, 8474 events. 5394/8474 cut-off events. For 294152/294152 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 52811 event pairs, 1525 based on Foata normal form. 20/8287 useless extension candidates. Maximal degree in co-relation 60004. Up to 7290 conditions per place. [2024-06-27 19:10:24,407 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 395 selfloop transitions, 62 changer transitions 0/466 dead transitions. [2024-06-27 19:10:24,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 466 transitions, 6459 flow [2024-06-27 19:10:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:10:24,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200945626477541 [2024-06-27 19:10:24,409 INFO L175 Difference]: Start difference. First operand has 232 places, 409 transitions, 5229 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:10:24,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 466 transitions, 6459 flow [2024-06-27 19:10:24,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 466 transitions, 6272 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:24,961 INFO L231 Difference]: Finished difference. Result has 236 places, 410 transitions, 5212 flow [2024-06-27 19:10:24,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5212, PETRI_PLACES=236, PETRI_TRANSITIONS=410} [2024-06-27 19:10:24,962 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 183 predicate places. [2024-06-27 19:10:24,962 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 410 transitions, 5212 flow [2024-06-27 19:10:24,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:24,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:24,962 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 19:10:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:10:24,962 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:24,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1680497817, now seen corresponding path program 4 times [2024-06-27 19:10:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687482539] [2024-06-27 19:10:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:25,541 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 19:10:25,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687482539] [2024-06-27 19:10:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687482539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:25,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:25,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613028301] [2024-06-27 19:10:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:25,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:25,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:25,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 410 transitions, 5212 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:27,521 INFO L124 PetriNetUnfolderBase]: 5548/8732 cut-off events. [2024-06-27 19:10:27,521 INFO L125 PetriNetUnfolderBase]: For 298949/298951 co-relation queries the response was YES. [2024-06-27 19:10:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61384 conditions, 8732 events. 5548/8732 cut-off events. For 298949/298951 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 54684 event pairs, 1418 based on Foata normal form. 20/8545 useless extension candidates. Maximal degree in co-relation 61274. Up to 7000 conditions per place. [2024-06-27 19:10:27,612 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 328 selfloop transitions, 138 changer transitions 0/475 dead transitions. [2024-06-27 19:10:27,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 475 transitions, 6562 flow [2024-06-27 19:10:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:10:27,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366430260047281 [2024-06-27 19:10:27,613 INFO L175 Difference]: Start difference. First operand has 236 places, 410 transitions, 5212 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:10:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 475 transitions, 6562 flow [2024-06-27 19:10:28,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 475 transitions, 6434 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:28,091 INFO L231 Difference]: Finished difference. Result has 238 places, 412 transitions, 5444 flow [2024-06-27 19:10:28,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5444, PETRI_PLACES=238, PETRI_TRANSITIONS=412} [2024-06-27 19:10:28,091 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 185 predicate places. [2024-06-27 19:10:28,091 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 412 transitions, 5444 flow [2024-06-27 19:10:28,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:28,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:28,092 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 19:10:28,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:10:28,092 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:28,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2084884615, now seen corresponding path program 5 times [2024-06-27 19:10:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:28,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531510597] [2024-06-27 19:10:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:28,666 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 19:10:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531510597] [2024-06-27 19:10:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531510597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530331970] [2024-06-27 19:10:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:28,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 412 transitions, 5444 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:28,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:30,627 INFO L124 PetriNetUnfolderBase]: 5702/8968 cut-off events. [2024-06-27 19:10:30,627 INFO L125 PetriNetUnfolderBase]: For 325133/325135 co-relation queries the response was YES. [2024-06-27 19:10:30,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64390 conditions, 8968 events. 5702/8968 cut-off events. For 325133/325135 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 56435 event pairs, 1481 based on Foata normal form. 20/8783 useless extension candidates. Maximal degree in co-relation 64279. Up to 7234 conditions per place. [2024-06-27 19:10:30,780 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 327 selfloop transitions, 138 changer transitions 0/474 dead transitions. [2024-06-27 19:10:30,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 474 transitions, 6778 flow [2024-06-27 19:10:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:10:30,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-27 19:10:30,782 INFO L175 Difference]: Start difference. First operand has 238 places, 412 transitions, 5444 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:10:30,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 474 transitions, 6778 flow [2024-06-27 19:10:31,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 474 transitions, 6466 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:31,819 INFO L231 Difference]: Finished difference. Result has 240 places, 414 transitions, 5496 flow [2024-06-27 19:10:31,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5496, PETRI_PLACES=240, PETRI_TRANSITIONS=414} [2024-06-27 19:10:31,820 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 187 predicate places. [2024-06-27 19:10:31,820 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 414 transitions, 5496 flow [2024-06-27 19:10:31,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:31,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:31,820 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 19:10:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:10:31,820 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:31,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2085032485, now seen corresponding path program 6 times [2024-06-27 19:10:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:31,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186731951] [2024-06-27 19:10:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:31,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:32,466 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 19:10:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186731951] [2024-06-27 19:10:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186731951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:32,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224379053] [2024-06-27 19:10:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:32,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:32,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 414 transitions, 5496 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:32,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:32,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:32,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:34,419 INFO L124 PetriNetUnfolderBase]: 5822/9158 cut-off events. [2024-06-27 19:10:34,419 INFO L125 PetriNetUnfolderBase]: For 335876/335878 co-relation queries the response was YES. [2024-06-27 19:10:34,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65769 conditions, 9158 events. 5822/9158 cut-off events. For 335876/335878 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57835 event pairs, 1450 based on Foata normal form. 16/8967 useless extension candidates. Maximal degree in co-relation 65657. Up to 7038 conditions per place. [2024-06-27 19:10:34,541 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 329 selfloop transitions, 144 changer transitions 0/482 dead transitions. [2024-06-27 19:10:34,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 482 transitions, 6928 flow [2024-06-27 19:10:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 19:10:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-06-27 19:10:34,542 INFO L175 Difference]: Start difference. First operand has 240 places, 414 transitions, 5496 flow. Second operand 9 states and 231 transitions. [2024-06-27 19:10:34,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 482 transitions, 6928 flow [2024-06-27 19:10:35,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 482 transitions, 6612 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:35,375 INFO L231 Difference]: Finished difference. Result has 243 places, 419 transitions, 5633 flow [2024-06-27 19:10:35,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=243, PETRI_TRANSITIONS=419} [2024-06-27 19:10:35,375 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-06-27 19:10:35,375 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 419 transitions, 5633 flow [2024-06-27 19:10:35,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:35,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:35,376 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 19:10:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:10:35,376 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:35,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1877958313, now seen corresponding path program 1 times [2024-06-27 19:10:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:35,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664644340] [2024-06-27 19:10:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:36,290 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 19:10:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664644340] [2024-06-27 19:10:36,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664644340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:10:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504582042] [2024-06-27 19:10:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:36,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:10:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:10:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:10:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:36,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 419 transitions, 5633 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:36,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:36,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:36,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:38,388 INFO L124 PetriNetUnfolderBase]: 5908/9274 cut-off events. [2024-06-27 19:10:38,388 INFO L125 PetriNetUnfolderBase]: For 345269/345271 co-relation queries the response was YES. [2024-06-27 19:10:38,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67015 conditions, 9274 events. 5908/9274 cut-off events. For 345269/345271 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 58760 event pairs, 1454 based on Foata normal form. 12/9080 useless extension candidates. Maximal degree in co-relation 66901. Up to 6956 conditions per place. [2024-06-27 19:10:38,514 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 333 selfloop transitions, 144 changer transitions 0/486 dead transitions. [2024-06-27 19:10:38,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 486 transitions, 7035 flow [2024-06-27 19:10:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:10:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 19:10:38,515 INFO L175 Difference]: Start difference. First operand has 243 places, 419 transitions, 5633 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:10:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 486 transitions, 7035 flow [2024-06-27 19:10:39,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 486 transitions, 6794 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:39,357 INFO L231 Difference]: Finished difference. Result has 247 places, 421 transitions, 5775 flow [2024-06-27 19:10:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5392, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5775, PETRI_PLACES=247, PETRI_TRANSITIONS=421} [2024-06-27 19:10:39,357 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 194 predicate places. [2024-06-27 19:10:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 421 transitions, 5775 flow [2024-06-27 19:10:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:39,360 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 19:10:39,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:10:39,360 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:39,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -733460040, now seen corresponding path program 1 times [2024-06-27 19:10:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:39,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505910267] [2024-06-27 19:10:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:39,784 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 19:10:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505910267] [2024-06-27 19:10:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505910267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852050267] [2024-06-27 19:10:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:39,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:39,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:39,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 421 transitions, 5775 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:39,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:39,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:39,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:41,548 INFO L124 PetriNetUnfolderBase]: 5928/9311 cut-off events. [2024-06-27 19:10:41,549 INFO L125 PetriNetUnfolderBase]: For 338169/338177 co-relation queries the response was YES. [2024-06-27 19:10:41,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67709 conditions, 9311 events. 5928/9311 cut-off events. For 338169/338177 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58955 event pairs, 1698 based on Foata normal form. 9/9111 useless extension candidates. Maximal degree in co-relation 67593. Up to 8424 conditions per place. [2024-06-27 19:10:41,668 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 415 selfloop transitions, 34 changer transitions 0/458 dead transitions. [2024-06-27 19:10:41,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 458 transitions, 6926 flow [2024-06-27 19:10:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:10:41,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:10:41,669 INFO L175 Difference]: Start difference. First operand has 247 places, 421 transitions, 5775 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:10:41,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 458 transitions, 6926 flow [2024-06-27 19:10:42,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 458 transitions, 6569 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:42,504 INFO L231 Difference]: Finished difference. Result has 247 places, 425 transitions, 5569 flow [2024-06-27 19:10:42,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5569, PETRI_PLACES=247, PETRI_TRANSITIONS=425} [2024-06-27 19:10:42,505 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 194 predicate places. [2024-06-27 19:10:42,505 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 425 transitions, 5569 flow [2024-06-27 19:10:42,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:42,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:42,505 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 19:10:42,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:10:42,505 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:42,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -727716360, now seen corresponding path program 2 times [2024-06-27 19:10:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450541504] [2024-06-27 19:10:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:42,934 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 19:10:42,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450541504] [2024-06-27 19:10:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450541504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:42,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:42,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511017022] [2024-06-27 19:10:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:43,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:43,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 425 transitions, 5569 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:43,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:43,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:43,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:44,795 INFO L124 PetriNetUnfolderBase]: 5971/9375 cut-off events. [2024-06-27 19:10:44,795 INFO L125 PetriNetUnfolderBase]: For 337796/337804 co-relation queries the response was YES. [2024-06-27 19:10:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67160 conditions, 9375 events. 5971/9375 cut-off events. For 337796/337804 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 59359 event pairs, 1697 based on Foata normal form. 9/9174 useless extension candidates. Maximal degree in co-relation 67043. Up to 8440 conditions per place. [2024-06-27 19:10:44,903 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 413 selfloop transitions, 43 changer transitions 0/465 dead transitions. [2024-06-27 19:10:44,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 465 transitions, 6957 flow [2024-06-27 19:10:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:10:44,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49848024316109424 [2024-06-27 19:10:44,904 INFO L175 Difference]: Start difference. First operand has 247 places, 425 transitions, 5569 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:10:44,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 465 transitions, 6957 flow [2024-06-27 19:10:45,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 465 transitions, 6897 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:10:45,748 INFO L231 Difference]: Finished difference. Result has 252 places, 432 transitions, 5773 flow [2024-06-27 19:10:45,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5773, PETRI_PLACES=252, PETRI_TRANSITIONS=432} [2024-06-27 19:10:45,749 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 199 predicate places. [2024-06-27 19:10:45,749 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 432 transitions, 5773 flow [2024-06-27 19:10:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:45,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:45,749 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 19:10:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:10:45,749 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:45,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:45,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1420384951, now seen corresponding path program 7 times [2024-06-27 19:10:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308966234] [2024-06-27 19:10:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:46,328 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 19:10:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308966234] [2024-06-27 19:10:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308966234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:46,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:46,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657439217] [2024-06-27 19:10:46,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:46,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:46,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:46,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 432 transitions, 5773 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:46,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:46,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:46,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:48,413 INFO L124 PetriNetUnfolderBase]: 6125/9618 cut-off events. [2024-06-27 19:10:48,413 INFO L125 PetriNetUnfolderBase]: For 379969/379969 co-relation queries the response was YES. [2024-06-27 19:10:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69757 conditions, 9618 events. 6125/9618 cut-off events. For 379969/379969 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 61165 event pairs, 1542 based on Foata normal form. 20/9424 useless extension candidates. Maximal degree in co-relation 69638. Up to 7871 conditions per place. [2024-06-27 19:10:48,548 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 351 selfloop transitions, 133 changer transitions 0/493 dead transitions. [2024-06-27 19:10:48,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 493 transitions, 7151 flow [2024-06-27 19:10:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:10:48,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:10:48,550 INFO L175 Difference]: Start difference. First operand has 252 places, 432 transitions, 5773 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:10:48,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 493 transitions, 7151 flow [2024-06-27 19:10:49,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 493 transitions, 7068 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:10:49,428 INFO L231 Difference]: Finished difference. Result has 257 places, 434 transitions, 6056 flow [2024-06-27 19:10:49,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6056, PETRI_PLACES=257, PETRI_TRANSITIONS=434} [2024-06-27 19:10:49,428 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 204 predicate places. [2024-06-27 19:10:49,428 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 434 transitions, 6056 flow [2024-06-27 19:10:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:49,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:49,429 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 19:10:49,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:10:49,429 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:49,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash -405612453, now seen corresponding path program 8 times [2024-06-27 19:10:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:49,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219139769] [2024-06-27 19:10:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:50,036 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 19:10:50,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:50,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219139769] [2024-06-27 19:10:50,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219139769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:50,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:50,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:50,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902425894] [2024-06-27 19:10:50,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:50,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:50,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:50,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:50,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:50,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 434 transitions, 6056 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:50,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:50,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:50,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:52,159 INFO L124 PetriNetUnfolderBase]: 6279/9862 cut-off events. [2024-06-27 19:10:52,159 INFO L125 PetriNetUnfolderBase]: For 414218/414218 co-relation queries the response was YES. [2024-06-27 19:10:52,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73041 conditions, 9862 events. 6279/9862 cut-off events. For 414218/414218 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 62967 event pairs, 1587 based on Foata normal form. 20/9669 useless extension candidates. Maximal degree in co-relation 72921. Up to 8105 conditions per place. [2024-06-27 19:10:52,318 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 346 selfloop transitions, 137 changer transitions 0/492 dead transitions. [2024-06-27 19:10:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 492 transitions, 7416 flow [2024-06-27 19:10:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:10:52,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-06-27 19:10:52,319 INFO L175 Difference]: Start difference. First operand has 257 places, 434 transitions, 6056 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:10:52,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 492 transitions, 7416 flow [2024-06-27 19:10:53,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 492 transitions, 7098 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:53,296 INFO L231 Difference]: Finished difference. Result has 259 places, 436 transitions, 6116 flow [2024-06-27 19:10:53,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5738, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6116, PETRI_PLACES=259, PETRI_TRANSITIONS=436} [2024-06-27 19:10:53,297 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 206 predicate places. [2024-06-27 19:10:53,297 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 436 transitions, 6116 flow [2024-06-27 19:10:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:53,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:53,297 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 19:10:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:10:53,297 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:53,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash -405760323, now seen corresponding path program 9 times [2024-06-27 19:10:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693766845] [2024-06-27 19:10:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:53,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:53,860 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 19:10:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693766845] [2024-06-27 19:10:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693766845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:53,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:53,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:53,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906212854] [2024-06-27 19:10:53,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:53,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:53,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 436 transitions, 6116 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:53,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:53,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:53,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:56,075 INFO L124 PetriNetUnfolderBase]: 6505/10212 cut-off events. [2024-06-27 19:10:56,075 INFO L125 PetriNetUnfolderBase]: For 449364/449364 co-relation queries the response was YES. [2024-06-27 19:10:56,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76584 conditions, 10212 events. 6505/10212 cut-off events. For 449364/449364 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65577 event pairs, 1586 based on Foata normal form. 16/10015 useless extension candidates. Maximal degree in co-relation 76463. Up to 7831 conditions per place. [2024-06-27 19:10:56,226 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 350 selfloop transitions, 144 changer transitions 0/503 dead transitions. [2024-06-27 19:10:56,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 503 transitions, 7826 flow [2024-06-27 19:10:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:10:56,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 19:10:56,227 INFO L175 Difference]: Start difference. First operand has 259 places, 436 transitions, 6116 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:10:56,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 503 transitions, 7826 flow [2024-06-27 19:10:57,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 503 transitions, 7496 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:57,218 INFO L231 Difference]: Finished difference. Result has 262 places, 442 transitions, 6320 flow [2024-06-27 19:10:57,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6320, PETRI_PLACES=262, PETRI_TRANSITIONS=442} [2024-06-27 19:10:57,218 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 209 predicate places. [2024-06-27 19:10:57,218 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 442 transitions, 6320 flow [2024-06-27 19:10:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:57,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:57,219 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 19:10:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:10:57,219 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:57,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1477543575, now seen corresponding path program 10 times [2024-06-27 19:10:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:57,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074085121] [2024-06-27 19:10:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:57,816 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 19:10:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074085121] [2024-06-27 19:10:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074085121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:57,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:57,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21750799] [2024-06-27 19:10:57,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:57,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:57,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:57,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:10:57,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 442 transitions, 6320 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:57,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:57,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:10:57,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:00,223 INFO L124 PetriNetUnfolderBase]: 6469/10143 cut-off events. [2024-06-27 19:11:00,223 INFO L125 PetriNetUnfolderBase]: For 433287/433287 co-relation queries the response was YES. [2024-06-27 19:11:00,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75079 conditions, 10143 events. 6469/10143 cut-off events. For 433287/433287 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 64956 event pairs, 1597 based on Foata normal form. 20/9950 useless extension candidates. Maximal degree in co-relation 74956. Up to 8399 conditions per place. [2024-06-27 19:11:00,356 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 353 selfloop transitions, 140 changer transitions 0/502 dead transitions. [2024-06-27 19:11:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 502 transitions, 7671 flow [2024-06-27 19:11:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:11:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:11:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:11:00,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:11:00,358 INFO L175 Difference]: Start difference. First operand has 262 places, 442 transitions, 6320 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:11:00,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 502 transitions, 7671 flow [2024-06-27 19:11:01,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 502 transitions, 7354 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:01,396 INFO L231 Difference]: Finished difference. Result has 266 places, 443 transitions, 6338 flow [2024-06-27 19:11:01,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6338, PETRI_PLACES=266, PETRI_TRANSITIONS=443} [2024-06-27 19:11:01,397 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 213 predicate places. [2024-06-27 19:11:01,397 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 443 transitions, 6338 flow [2024-06-27 19:11:01,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:01,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:01,397 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 19:11:01,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:11:01,398 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:01,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash -400034871, now seen corresponding path program 2 times [2024-06-27 19:11:01,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:01,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446272861] [2024-06-27 19:11:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:02,154 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 19:11:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446272861] [2024-06-27 19:11:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446272861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:02,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:11:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935054113] [2024-06-27 19:11:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:11:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:11:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:11:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 443 transitions, 6338 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:02,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:02,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:04,602 INFO L124 PetriNetUnfolderBase]: 6555/10301 cut-off events. [2024-06-27 19:11:04,602 INFO L125 PetriNetUnfolderBase]: For 413812/413812 co-relation queries the response was YES. [2024-06-27 19:11:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75432 conditions, 10301 events. 6555/10301 cut-off events. For 413812/413812 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 66416 event pairs, 1609 based on Foata normal form. 12/10102 useless extension candidates. Maximal degree in co-relation 75307. Up to 8185 conditions per place. [2024-06-27 19:11:04,737 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 359 selfloop transitions, 138 changer transitions 0/506 dead transitions. [2024-06-27 19:11:04,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 506 transitions, 7772 flow [2024-06-27 19:11:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:11:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:11:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:11:04,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-06-27 19:11:04,738 INFO L175 Difference]: Start difference. First operand has 266 places, 443 transitions, 6338 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:11:04,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 506 transitions, 7772 flow [2024-06-27 19:11:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 506 transitions, 7476 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:05,900 INFO L231 Difference]: Finished difference. Result has 268 places, 445 transitions, 6429 flow [2024-06-27 19:11:05,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6042, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6429, PETRI_PLACES=268, PETRI_TRANSITIONS=445} [2024-06-27 19:11:05,901 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 215 predicate places. [2024-06-27 19:11:05,901 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 445 transitions, 6429 flow [2024-06-27 19:11:05,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:05,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:05,901 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 19:11:05,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:11:05,901 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:05,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:05,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1244675659, now seen corresponding path program 3 times [2024-06-27 19:11:05,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:05,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352219145] [2024-06-27 19:11:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:05,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:06,674 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 19:11:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352219145] [2024-06-27 19:11:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352219145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:06,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:06,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:11:06,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128050146] [2024-06-27 19:11:06,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:06,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:11:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:11:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:11:06,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:06,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 445 transitions, 6429 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:06,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:06,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:09,129 INFO L124 PetriNetUnfolderBase]: 6641/10438 cut-off events. [2024-06-27 19:11:09,129 INFO L125 PetriNetUnfolderBase]: For 441553/441553 co-relation queries the response was YES. [2024-06-27 19:11:09,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77182 conditions, 10438 events. 6641/10438 cut-off events. For 441553/441553 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 67555 event pairs, 1621 based on Foata normal form. 12/10238 useless extension candidates. Maximal degree in co-relation 77056. Up to 8517 conditions per place. [2024-06-27 19:11:09,263 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 357 selfloop transitions, 143 changer transitions 0/509 dead transitions. [2024-06-27 19:11:09,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 509 transitions, 7879 flow [2024-06-27 19:11:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:11:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:11:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:11:09,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-06-27 19:11:09,265 INFO L175 Difference]: Start difference. First operand has 268 places, 445 transitions, 6429 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:11:09,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 509 transitions, 7879 flow [2024-06-27 19:11:10,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 509 transitions, 7528 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:10,497 INFO L231 Difference]: Finished difference. Result has 270 places, 447 transitions, 6479 flow [2024-06-27 19:11:10,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6479, PETRI_PLACES=270, PETRI_TRANSITIONS=447} [2024-06-27 19:11:10,498 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 217 predicate places. [2024-06-27 19:11:10,498 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 447 transitions, 6479 flow [2024-06-27 19:11:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:10,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:10,498 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 19:11:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:11:10,498 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:10,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2092898921, now seen corresponding path program 4 times [2024-06-27 19:11:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864169667] [2024-06-27 19:11:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:11,300 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 19:11:11,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864169667] [2024-06-27 19:11:11,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864169667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:11,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:11,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:11:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481701928] [2024-06-27 19:11:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:11,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:11:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:11:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:11:11,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:11,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 447 transitions, 6479 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:11,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:11,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:11,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:13,761 INFO L124 PetriNetUnfolderBase]: 6621/10412 cut-off events. [2024-06-27 19:11:13,761 INFO L125 PetriNetUnfolderBase]: For 428064/428064 co-relation queries the response was YES. [2024-06-27 19:11:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75999 conditions, 10412 events. 6621/10412 cut-off events. For 428064/428064 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67456 event pairs, 1425 based on Foata normal form. 12/10212 useless extension candidates. Maximal degree in co-relation 75872. Up to 6963 conditions per place. [2024-06-27 19:11:13,889 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 333 selfloop transitions, 166 changer transitions 0/508 dead transitions. [2024-06-27 19:11:13,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 508 transitions, 7833 flow [2024-06-27 19:11:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:11:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:11:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:11:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:11:13,891 INFO L175 Difference]: Start difference. First operand has 270 places, 447 transitions, 6479 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:11:13,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 508 transitions, 7833 flow [2024-06-27 19:11:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 508 transitions, 7468 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:14,855 INFO L231 Difference]: Finished difference. Result has 271 places, 448 transitions, 6479 flow [2024-06-27 19:11:14,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6479, PETRI_PLACES=271, PETRI_TRANSITIONS=448} [2024-06-27 19:11:14,856 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 218 predicate places. [2024-06-27 19:11:14,856 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 448 transitions, 6479 flow [2024-06-27 19:11:14,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:14,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:14,856 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 19:11:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:11:14,857 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:14,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2139151276, now seen corresponding path program 3 times [2024-06-27 19:11:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:14,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69189512] [2024-06-27 19:11:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:15,270 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 19:11:15,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69189512] [2024-06-27 19:11:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69189512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:15,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369565616] [2024-06-27 19:11:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:15,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:15,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:15,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 448 transitions, 6479 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:15,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:15,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:15,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:17,273 INFO L124 PetriNetUnfolderBase]: 6618/10405 cut-off events. [2024-06-27 19:11:17,273 INFO L125 PetriNetUnfolderBase]: For 419044/419044 co-relation queries the response was YES. [2024-06-27 19:11:17,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75939 conditions, 10405 events. 6618/10405 cut-off events. For 419044/419044 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67270 event pairs, 1897 based on Foata normal form. 1/10197 useless extension candidates. Maximal degree in co-relation 75811. Up to 9480 conditions per place. [2024-06-27 19:11:17,420 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 437 selfloop transitions, 34 changer transitions 0/480 dead transitions. [2024-06-27 19:11:17,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 480 transitions, 7615 flow [2024-06-27 19:11:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:11:17,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48328267477203646 [2024-06-27 19:11:17,421 INFO L175 Difference]: Start difference. First operand has 271 places, 448 transitions, 6479 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:11:17,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 480 transitions, 7615 flow [2024-06-27 19:11:18,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 480 transitions, 7182 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:18,635 INFO L231 Difference]: Finished difference. Result has 271 places, 448 transitions, 6121 flow [2024-06-27 19:11:18,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6046, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6121, PETRI_PLACES=271, PETRI_TRANSITIONS=448} [2024-06-27 19:11:18,636 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 218 predicate places. [2024-06-27 19:11:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 448 transitions, 6121 flow [2024-06-27 19:11:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:18,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:18,636 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 19:11:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:11:18,636 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:18,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -215496172, now seen corresponding path program 4 times [2024-06-27 19:11:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628072298] [2024-06-27 19:11:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:19,064 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 19:11:19,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628072298] [2024-06-27 19:11:19,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628072298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:19,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:19,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833118060] [2024-06-27 19:11:19,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:19,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:19,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:19,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 448 transitions, 6121 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:19,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:19,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:19,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:21,082 INFO L124 PetriNetUnfolderBase]: 6610/10385 cut-off events. [2024-06-27 19:11:21,083 INFO L125 PetriNetUnfolderBase]: For 406039/406039 co-relation queries the response was YES. [2024-06-27 19:11:21,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73860 conditions, 10385 events. 6610/10385 cut-off events. For 406039/406039 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 67088 event pairs, 1883 based on Foata normal form. 2/10177 useless extension candidates. Maximal degree in co-relation 73731. Up to 9375 conditions per place. [2024-06-27 19:11:21,236 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 425 selfloop transitions, 46 changer transitions 0/480 dead transitions. [2024-06-27 19:11:21,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 480 transitions, 7325 flow [2024-06-27 19:11:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:11:21,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:11:21,237 INFO L175 Difference]: Start difference. First operand has 271 places, 448 transitions, 6121 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:11:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 480 transitions, 7325 flow [2024-06-27 19:11:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 480 transitions, 7228 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:23,059 INFO L231 Difference]: Finished difference. Result has 273 places, 448 transitions, 6125 flow [2024-06-27 19:11:23,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6125, PETRI_PLACES=273, PETRI_TRANSITIONS=448} [2024-06-27 19:11:23,060 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 220 predicate places. [2024-06-27 19:11:23,060 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 448 transitions, 6125 flow [2024-06-27 19:11:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:23,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:23,061 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 19:11:23,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:11:23,061 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:23,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1008975862, now seen corresponding path program 5 times [2024-06-27 19:11:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:23,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857856707] [2024-06-27 19:11:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:23,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:23,567 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 19:11:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857856707] [2024-06-27 19:11:23,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857856707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:23,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:23,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300155144] [2024-06-27 19:11:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:23,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:23,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:23,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 448 transitions, 6125 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:23,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:23,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:23,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:25,775 INFO L124 PetriNetUnfolderBase]: 6650/10465 cut-off events. [2024-06-27 19:11:25,775 INFO L125 PetriNetUnfolderBase]: For 419068/419076 co-relation queries the response was YES. [2024-06-27 19:11:25,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74541 conditions, 10465 events. 6650/10465 cut-off events. For 419068/419076 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 67827 event pairs, 1866 based on Foata normal form. 10/10262 useless extension candidates. Maximal degree in co-relation 74411. Up to 9192 conditions per place. [2024-06-27 19:11:25,916 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 399 selfloop transitions, 80 changer transitions 0/488 dead transitions. [2024-06-27 19:11:25,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 488 transitions, 7664 flow [2024-06-27 19:11:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:11:25,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49848024316109424 [2024-06-27 19:11:25,918 INFO L175 Difference]: Start difference. First operand has 273 places, 448 transitions, 6125 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:11:25,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 488 transitions, 7664 flow [2024-06-27 19:11:27,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 488 transitions, 7540 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:11:27,201 INFO L231 Difference]: Finished difference. Result has 274 places, 452 transitions, 6234 flow [2024-06-27 19:11:27,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6001, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6234, PETRI_PLACES=274, PETRI_TRANSITIONS=452} [2024-06-27 19:11:27,202 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 221 predicate places. [2024-06-27 19:11:27,202 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 452 transitions, 6234 flow [2024-06-27 19:11:27,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:27,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:27,202 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 19:11:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:11:27,202 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1009213012, now seen corresponding path program 6 times [2024-06-27 19:11:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584366944] [2024-06-27 19:11:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:27,672 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 19:11:27,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584366944] [2024-06-27 19:11:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584366944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:27,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:27,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:27,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054469969] [2024-06-27 19:11:27,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:27,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:27,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:27,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:27,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 452 transitions, 6234 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:27,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:27,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:27,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:29,654 INFO L124 PetriNetUnfolderBase]: 6642/10483 cut-off events. [2024-06-27 19:11:29,654 INFO L125 PetriNetUnfolderBase]: For 422817/422825 co-relation queries the response was YES. [2024-06-27 19:11:29,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74685 conditions, 10483 events. 6642/10483 cut-off events. For 422817/422825 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 68121 event pairs, 1877 based on Foata normal form. 10/10279 useless extension candidates. Maximal degree in co-relation 74554. Up to 9184 conditions per place. [2024-06-27 19:11:29,798 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 402 selfloop transitions, 75 changer transitions 0/486 dead transitions. [2024-06-27 19:11:29,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 486 transitions, 7557 flow [2024-06-27 19:11:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:11:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:11:29,800 INFO L175 Difference]: Start difference. First operand has 274 places, 452 transitions, 6234 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:11:29,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 486 transitions, 7557 flow [2024-06-27 19:11:31,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 486 transitions, 7308 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:11:31,174 INFO L231 Difference]: Finished difference. Result has 275 places, 452 transitions, 6145 flow [2024-06-27 19:11:31,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6145, PETRI_PLACES=275, PETRI_TRANSITIONS=452} [2024-06-27 19:11:31,175 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 222 predicate places. [2024-06-27 19:11:31,175 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 452 transitions, 6145 flow [2024-06-27 19:11:31,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:31,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:31,175 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 19:11:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:11:31,175 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:31,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1017792820, now seen corresponding path program 1 times [2024-06-27 19:11:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379792260] [2024-06-27 19:11:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:31,691 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 19:11:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:31,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379792260] [2024-06-27 19:11:31,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379792260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:31,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667449955] [2024-06-27 19:11:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:31,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:11:31,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 452 transitions, 6145 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:31,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:31,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:11:31,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:33,779 INFO L124 PetriNetUnfolderBase]: 6323/10089 cut-off events. [2024-06-27 19:11:33,779 INFO L125 PetriNetUnfolderBase]: For 423909/423965 co-relation queries the response was YES. [2024-06-27 19:11:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71888 conditions, 10089 events. 6323/10089 cut-off events. For 423909/423965 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 66101 event pairs, 1804 based on Foata normal form. 14/9775 useless extension candidates. Maximal degree in co-relation 71757. Up to 8728 conditions per place. [2024-06-27 19:11:33,902 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 361 selfloop transitions, 73 changer transitions 0/484 dead transitions. [2024-06-27 19:11:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 484 transitions, 7445 flow [2024-06-27 19:11:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:11:33,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49848024316109424 [2024-06-27 19:11:33,903 INFO L175 Difference]: Start difference. First operand has 275 places, 452 transitions, 6145 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:11:33,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 484 transitions, 7445 flow [2024-06-27 19:11:35,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 484 transitions, 7276 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:11:35,314 INFO L231 Difference]: Finished difference. Result has 276 places, 460 transitions, 6322 flow [2024-06-27 19:11:35,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6322, PETRI_PLACES=276, PETRI_TRANSITIONS=460} [2024-06-27 19:11:35,315 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 223 predicate places. [2024-06-27 19:11:35,315 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 460 transitions, 6322 flow [2024-06-27 19:11:35,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:35,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:35,315 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 19:11:35,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:11:35,315 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:35,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash -877665738, now seen corresponding path program 2 times [2024-06-27 19:11:35,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:35,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703930248] [2024-06-27 19:11:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:35,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:35,893 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 19:11:35,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703930248] [2024-06-27 19:11:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703930248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:35,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:35,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:35,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922440563] [2024-06-27 19:11:35,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:35,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:36,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 19:11:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 460 transitions, 6322 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:36,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:36,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 19:11:36,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:38,048 INFO L124 PetriNetUnfolderBase]: 6346/10104 cut-off events. [2024-06-27 19:11:38,048 INFO L125 PetriNetUnfolderBase]: For 441549/441654 co-relation queries the response was YES. [2024-06-27 19:11:38,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72999 conditions, 10104 events. 6346/10104 cut-off events. For 441549/441654 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66078 event pairs, 1796 based on Foata normal form. 14/9788 useless extension candidates. Maximal degree in co-relation 72867. Up to 8803 conditions per place. [2024-06-27 19:11:38,190 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 368 selfloop transitions, 69 changer transitions 0/487 dead transitions. [2024-06-27 19:11:38,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 487 transitions, 7395 flow [2024-06-27 19:11:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:11:38,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 19:11:38,191 INFO L175 Difference]: Start difference. First operand has 276 places, 460 transitions, 6322 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:11:38,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 487 transitions, 7395 flow [2024-06-27 19:11:39,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 487 transitions, 7194 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-27 19:11:39,662 INFO L231 Difference]: Finished difference. Result has 281 places, 464 transitions, 6363 flow [2024-06-27 19:11:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6363, PETRI_PLACES=281, PETRI_TRANSITIONS=464} [2024-06-27 19:11:39,662 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 228 predicate places. [2024-06-27 19:11:39,662 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 464 transitions, 6363 flow [2024-06-27 19:11:39,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:39,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:39,663 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 19:11:39,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:11:39,663 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:39,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2147236212, now seen corresponding path program 1 times [2024-06-27 19:11:39,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:39,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536474112] [2024-06-27 19:11:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:40,315 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 19:11:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536474112] [2024-06-27 19:11:40,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536474112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:40,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:40,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:40,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838420201] [2024-06-27 19:11:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:40,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:40,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 464 transitions, 6363 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:40,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:40,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:40,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:42,620 INFO L124 PetriNetUnfolderBase]: 6669/10491 cut-off events. [2024-06-27 19:11:42,620 INFO L125 PetriNetUnfolderBase]: For 441110/441110 co-relation queries the response was YES. [2024-06-27 19:11:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75623 conditions, 10491 events. 6669/10491 cut-off events. For 441110/441110 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 68009 event pairs, 1920 based on Foata normal form. 1/10282 useless extension candidates. Maximal degree in co-relation 75488. Up to 9572 conditions per place. [2024-06-27 19:11:42,740 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 455 selfloop transitions, 31 changer transitions 0/495 dead transitions. [2024-06-27 19:11:42,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 495 transitions, 7535 flow [2024-06-27 19:11:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:11:42,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:11:42,741 INFO L175 Difference]: Start difference. First operand has 281 places, 464 transitions, 6363 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:11:42,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 495 transitions, 7535 flow [2024-06-27 19:11:43,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 495 transitions, 7267 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 19:11:43,923 INFO L231 Difference]: Finished difference. Result has 284 places, 467 transitions, 6241 flow [2024-06-27 19:11:43,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6241, PETRI_PLACES=284, PETRI_TRANSITIONS=467} [2024-06-27 19:11:43,924 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 231 predicate places. [2024-06-27 19:11:43,924 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 467 transitions, 6241 flow [2024-06-27 19:11:43,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:43,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:43,924 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 19:11:43,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:11:43,924 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:43,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2147144886, now seen corresponding path program 1 times [2024-06-27 19:11:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:43,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000136890] [2024-06-27 19:11:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:44,386 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 19:11:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000136890] [2024-06-27 19:11:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000136890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395598240] [2024-06-27 19:11:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:44,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:44,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 467 transitions, 6241 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:44,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:44,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:44,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:46,762 INFO L124 PetriNetUnfolderBase]: 6823/10709 cut-off events. [2024-06-27 19:11:46,763 INFO L125 PetriNetUnfolderBase]: For 466725/466725 co-relation queries the response was YES. [2024-06-27 19:11:46,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77290 conditions, 10709 events. 6823/10709 cut-off events. For 466725/466725 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 69376 event pairs, 1783 based on Foata normal form. 4/10501 useless extension candidates. Maximal degree in co-relation 77154. Up to 9375 conditions per place. [2024-06-27 19:11:46,926 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 401 selfloop transitions, 127 changer transitions 0/537 dead transitions. [2024-06-27 19:11:46,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 537 transitions, 8098 flow [2024-06-27 19:11:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:11:46,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2024-06-27 19:11:46,928 INFO L175 Difference]: Start difference. First operand has 284 places, 467 transitions, 6241 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:11:46,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 537 transitions, 8098 flow [2024-06-27 19:11:48,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 537 transitions, 8034 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:48,617 INFO L231 Difference]: Finished difference. Result has 289 places, 499 transitions, 6990 flow [2024-06-27 19:11:48,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6990, PETRI_PLACES=289, PETRI_TRANSITIONS=499} [2024-06-27 19:11:48,617 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 236 predicate places. [2024-06-27 19:11:48,617 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 499 transitions, 6990 flow [2024-06-27 19:11:48,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:48,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:48,617 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 19:11:48,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:11:48,618 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:48,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2143396986, now seen corresponding path program 2 times [2024-06-27 19:11:48,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:48,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587168815] [2024-06-27 19:11:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:48,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:49,108 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 19:11:49,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:49,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587168815] [2024-06-27 19:11:49,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587168815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:49,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:49,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117015784] [2024-06-27 19:11:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:49,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:49,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 499 transitions, 6990 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:49,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:49,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:51,526 INFO L124 PetriNetUnfolderBase]: 7247/11264 cut-off events. [2024-06-27 19:11:51,527 INFO L125 PetriNetUnfolderBase]: For 556849/556849 co-relation queries the response was YES. [2024-06-27 19:11:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86893 conditions, 11264 events. 7247/11264 cut-off events. For 556849/556849 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72485 event pairs, 1804 based on Foata normal form. 4/11060 useless extension candidates. Maximal degree in co-relation 86754. Up to 9344 conditions per place. [2024-06-27 19:11:51,727 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 418 selfloop transitions, 142 changer transitions 0/569 dead transitions. [2024-06-27 19:11:51,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 569 transitions, 9258 flow [2024-06-27 19:11:51,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:11:51,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 19:11:51,729 INFO L175 Difference]: Start difference. First operand has 289 places, 499 transitions, 6990 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:11:51,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 569 transitions, 9258 flow [2024-06-27 19:11:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 569 transitions, 9052 flow, removed 92 selfloop flow, removed 2 redundant places. [2024-06-27 19:11:53,763 INFO L231 Difference]: Finished difference. Result has 297 places, 523 transitions, 7708 flow [2024-06-27 19:11:53,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=297, PETRI_TRANSITIONS=523} [2024-06-27 19:11:53,763 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 244 predicate places. [2024-06-27 19:11:53,763 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 523 transitions, 7708 flow [2024-06-27 19:11:53,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:53,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:53,764 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 19:11:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:11:53,764 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:53,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash -215480548, now seen corresponding path program 3 times [2024-06-27 19:11:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:53,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229492013] [2024-06-27 19:11:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:53,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:54,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229492013] [2024-06-27 19:11:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229492013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:54,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883392121] [2024-06-27 19:11:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:54,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:54,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:54,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 523 transitions, 7708 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:54,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:54,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:54,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:56,926 INFO L124 PetriNetUnfolderBase]: 7381/11468 cut-off events. [2024-06-27 19:11:56,926 INFO L125 PetriNetUnfolderBase]: For 595642/595642 co-relation queries the response was YES. [2024-06-27 19:11:57,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90672 conditions, 11468 events. 7381/11468 cut-off events. For 595642/595642 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 73871 event pairs, 1773 based on Foata normal form. 8/11267 useless extension candidates. Maximal degree in co-relation 90529. Up to 9454 conditions per place. [2024-06-27 19:11:57,091 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 414 selfloop transitions, 157 changer transitions 0/580 dead transitions. [2024-06-27 19:11:57,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 580 transitions, 9766 flow [2024-06-27 19:11:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:11:57,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:11:57,092 INFO L175 Difference]: Start difference. First operand has 297 places, 523 transitions, 7708 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:11:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 580 transitions, 9766 flow [2024-06-27 19:11:58,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 580 transitions, 9369 flow, removed 144 selfloop flow, removed 3 redundant places. [2024-06-27 19:11:58,894 INFO L231 Difference]: Finished difference. Result has 304 places, 540 transitions, 8165 flow [2024-06-27 19:11:58,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8165, PETRI_PLACES=304, PETRI_TRANSITIONS=540} [2024-06-27 19:11:58,895 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 251 predicate places. [2024-06-27 19:11:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 540 transitions, 8165 flow [2024-06-27 19:11:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:58,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:58,895 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 19:11:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:11:58,895 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2143390228, now seen corresponding path program 1 times [2024-06-27 19:11:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835324556] [2024-06-27 19:11:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:59,592 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 19:11:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835324556] [2024-06-27 19:11:59,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835324556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:59,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680169968] [2024-06-27 19:11:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:59,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:59,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:59,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:11:59,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 540 transitions, 8165 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:59,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:59,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:11:59,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:02,067 INFO L124 PetriNetUnfolderBase]: 7383/11473 cut-off events. [2024-06-27 19:12:02,067 INFO L125 PetriNetUnfolderBase]: For 580044/580044 co-relation queries the response was YES. [2024-06-27 19:12:02,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91099 conditions, 11473 events. 7383/11473 cut-off events. For 580044/580044 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73951 event pairs, 1850 based on Foata normal form. 2/11267 useless extension candidates. Maximal degree in co-relation 90952. Up to 10384 conditions per place. [2024-06-27 19:12:02,270 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 508 selfloop transitions, 69 changer transitions 0/586 dead transitions. [2024-06-27 19:12:02,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 586 transitions, 9833 flow [2024-06-27 19:12:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:12:02,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867021276595745 [2024-06-27 19:12:02,271 INFO L175 Difference]: Start difference. First operand has 304 places, 540 transitions, 8165 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:12:02,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 586 transitions, 9833 flow [2024-06-27 19:12:04,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 586 transitions, 9588 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-27 19:12:04,611 INFO L231 Difference]: Finished difference. Result has 309 places, 549 transitions, 8330 flow [2024-06-27 19:12:04,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8330, PETRI_PLACES=309, PETRI_TRANSITIONS=549} [2024-06-27 19:12:04,611 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 256 predicate places. [2024-06-27 19:12:04,612 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 549 transitions, 8330 flow [2024-06-27 19:12:04,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:04,612 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 19:12:04,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:12:04,612 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:04,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:04,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1009222126, now seen corresponding path program 4 times [2024-06-27 19:12:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370189614] [2024-06-27 19:12:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:05,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370189614] [2024-06-27 19:12:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370189614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:05,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:05,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401255102] [2024-06-27 19:12:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:05,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:05,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 549 transitions, 8330 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:05,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:05,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:05,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:07,680 INFO L124 PetriNetUnfolderBase]: 7519/11658 cut-off events. [2024-06-27 19:12:07,681 INFO L125 PetriNetUnfolderBase]: For 620908/620910 co-relation queries the response was YES. [2024-06-27 19:12:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93543 conditions, 11658 events. 7519/11658 cut-off events. For 620908/620910 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 75032 event pairs, 1790 based on Foata normal form. 4/11456 useless extension candidates. Maximal degree in co-relation 93394. Up to 9008 conditions per place. [2024-06-27 19:12:07,855 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 447 selfloop transitions, 195 changer transitions 0/651 dead transitions. [2024-06-27 19:12:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 651 transitions, 11356 flow [2024-06-27 19:12:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:12:07,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-06-27 19:12:07,856 INFO L175 Difference]: Start difference. First operand has 309 places, 549 transitions, 8330 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:12:07,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 651 transitions, 11356 flow [2024-06-27 19:12:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 651 transitions, 11043 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 19:12:10,043 INFO L231 Difference]: Finished difference. Result has 314 places, 597 transitions, 9491 flow [2024-06-27 19:12:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9491, PETRI_PLACES=314, PETRI_TRANSITIONS=597} [2024-06-27 19:12:10,043 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 261 predicate places. [2024-06-27 19:12:10,043 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 597 transitions, 9491 flow [2024-06-27 19:12:10,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:10,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:10,044 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 19:12:10,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:12:10,044 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:10,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1009228884, now seen corresponding path program 2 times [2024-06-27 19:12:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148507919] [2024-06-27 19:12:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:10,687 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 19:12:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:10,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148507919] [2024-06-27 19:12:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148507919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:10,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043915885] [2024-06-27 19:12:10,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:10,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:10,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:10,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:10,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 597 transitions, 9491 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:10,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:10,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:10,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:13,595 INFO L124 PetriNetUnfolderBase]: 7695/11901 cut-off events. [2024-06-27 19:12:13,595 INFO L125 PetriNetUnfolderBase]: For 678300/678302 co-relation queries the response was YES. [2024-06-27 19:12:13,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100363 conditions, 11901 events. 7695/11901 cut-off events. For 678300/678302 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 76584 event pairs, 1750 based on Foata normal form. 6/11700 useless extension candidates. Maximal degree in co-relation 100210. Up to 9635 conditions per place. [2024-06-27 19:12:13,776 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 476 selfloop transitions, 203 changer transitions 0/688 dead transitions. [2024-06-27 19:12:13,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 688 transitions, 12870 flow [2024-06-27 19:12:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:12:13,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186170212765957 [2024-06-27 19:12:13,777 INFO L175 Difference]: Start difference. First operand has 314 places, 597 transitions, 9491 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:12:13,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 688 transitions, 12870 flow [2024-06-27 19:12:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 688 transitions, 12301 flow, removed 236 selfloop flow, removed 2 redundant places. [2024-06-27 19:12:16,221 INFO L231 Difference]: Finished difference. Result has 323 places, 644 transitions, 10762 flow [2024-06-27 19:12:16,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10762, PETRI_PLACES=323, PETRI_TRANSITIONS=644} [2024-06-27 19:12:16,222 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 270 predicate places. [2024-06-27 19:12:16,222 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 644 transitions, 10762 flow [2024-06-27 19:12:16,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:16,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:16,222 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 19:12:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:12:16,223 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:16,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1017503094, now seen corresponding path program 3 times [2024-06-27 19:12:16,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:16,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647293595] [2024-06-27 19:12:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:16,824 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 19:12:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647293595] [2024-06-27 19:12:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647293595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:16,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936268648] [2024-06-27 19:12:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:16,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:16,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:16,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 644 transitions, 10762 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:16,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:16,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:16,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:20,004 INFO L124 PetriNetUnfolderBase]: 7735/11944 cut-off events. [2024-06-27 19:12:20,004 INFO L125 PetriNetUnfolderBase]: For 681956/681964 co-relation queries the response was YES. [2024-06-27 19:12:20,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102123 conditions, 11944 events. 7735/11944 cut-off events. For 681956/681964 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 76648 event pairs, 1830 based on Foata normal form. 10/11744 useless extension candidates. Maximal degree in co-relation 101965. Up to 10622 conditions per place. [2024-06-27 19:12:20,174 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 557 selfloop transitions, 128 changer transitions 0/694 dead transitions. [2024-06-27 19:12:20,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 694 transitions, 12870 flow [2024-06-27 19:12:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:12:20,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920212765957447 [2024-06-27 19:12:20,175 INFO L175 Difference]: Start difference. First operand has 323 places, 644 transitions, 10762 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:12:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 694 transitions, 12870 flow [2024-06-27 19:12:22,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 694 transitions, 12549 flow, removed 112 selfloop flow, removed 2 redundant places. [2024-06-27 19:12:22,891 INFO L231 Difference]: Finished difference. Result has 329 places, 652 transitions, 10956 flow [2024-06-27 19:12:22,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10453, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10956, PETRI_PLACES=329, PETRI_TRANSITIONS=652} [2024-06-27 19:12:22,892 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 276 predicate places. [2024-06-27 19:12:22,892 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 652 transitions, 10956 flow [2024-06-27 19:12:22,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:22,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:22,892 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 19:12:22,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:12:22,893 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:22,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 572665560, now seen corresponding path program 5 times [2024-06-27 19:12:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154898101] [2024-06-27 19:12:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:23,581 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 19:12:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:23,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154898101] [2024-06-27 19:12:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154898101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:23,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:23,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127675916] [2024-06-27 19:12:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:23,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:23,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 652 transitions, 10956 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:23,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:23,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:26,333 INFO L124 PetriNetUnfolderBase]: 7779/12019 cut-off events. [2024-06-27 19:12:26,333 INFO L125 PetriNetUnfolderBase]: For 706055/706057 co-relation queries the response was YES. [2024-06-27 19:12:26,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103100 conditions, 12019 events. 7779/12019 cut-off events. For 706055/706057 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 77145 event pairs, 1812 based on Foata normal form. 8/11819 useless extension candidates. Maximal degree in co-relation 102940. Up to 9176 conditions per place. [2024-06-27 19:12:26,563 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 454 selfloop transitions, 234 changer transitions 0/697 dead transitions. [2024-06-27 19:12:26,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 697 transitions, 13140 flow [2024-06-27 19:12:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:12:26,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-06-27 19:12:26,564 INFO L175 Difference]: Start difference. First operand has 329 places, 652 transitions, 10956 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:12:26,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 697 transitions, 13140 flow [2024-06-27 19:12:29,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 697 transitions, 12515 flow, removed 188 selfloop flow, removed 6 redundant places. [2024-06-27 19:12:29,351 INFO L231 Difference]: Finished difference. Result has 332 places, 659 transitions, 11091 flow [2024-06-27 19:12:29,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10398, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11091, PETRI_PLACES=332, PETRI_TRANSITIONS=659} [2024-06-27 19:12:29,351 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 279 predicate places. [2024-06-27 19:12:29,352 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 659 transitions, 11091 flow [2024-06-27 19:12:29,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:29,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:29,352 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 19:12:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:12:29,352 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:29,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:29,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1009459276, now seen corresponding path program 6 times [2024-06-27 19:12:29,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:29,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882050718] [2024-06-27 19:12:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:29,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882050718] [2024-06-27 19:12:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882050718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:29,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:29,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014549349] [2024-06-27 19:12:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:29,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:29,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 659 transitions, 11091 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:29,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:29,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:29,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:33,521 INFO L124 PetriNetUnfolderBase]: 7892/12150 cut-off events. [2024-06-27 19:12:33,521 INFO L125 PetriNetUnfolderBase]: For 721453/721455 co-relation queries the response was YES. [2024-06-27 19:12:33,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105162 conditions, 12150 events. 7892/12150 cut-off events. For 721453/721455 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 77828 event pairs, 1756 based on Foata normal form. 8/11951 useless extension candidates. Maximal degree in co-relation 105000. Up to 9271 conditions per place. [2024-06-27 19:12:33,706 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 437 selfloop transitions, 272 changer transitions 0/718 dead transitions. [2024-06-27 19:12:33,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 718 transitions, 13754 flow [2024-06-27 19:12:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:12:33,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-06-27 19:12:33,707 INFO L175 Difference]: Start difference. First operand has 332 places, 659 transitions, 11091 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:12:33,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 718 transitions, 13754 flow [2024-06-27 19:12:37,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 718 transitions, 13193 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 19:12:37,095 INFO L231 Difference]: Finished difference. Result has 338 places, 682 transitions, 11860 flow [2024-06-27 19:12:37,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10547, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11860, PETRI_PLACES=338, PETRI_TRANSITIONS=682} [2024-06-27 19:12:37,096 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 285 predicate places. [2024-06-27 19:12:37,096 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 682 transitions, 11860 flow [2024-06-27 19:12:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:37,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:37,096 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 19:12:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:12:37,096 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:37,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1017799764, now seen corresponding path program 4 times [2024-06-27 19:12:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:37,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510082106] [2024-06-27 19:12:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:37,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:37,792 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 19:12:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510082106] [2024-06-27 19:12:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510082106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:37,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:37,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661528625] [2024-06-27 19:12:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:37,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:37,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 682 transitions, 11860 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:37,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:37,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:37,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:41,201 INFO L124 PetriNetUnfolderBase]: 7884/12150 cut-off events. [2024-06-27 19:12:41,201 INFO L125 PetriNetUnfolderBase]: For 716369/716371 co-relation queries the response was YES. [2024-06-27 19:12:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105984 conditions, 12150 events. 7884/12150 cut-off events. For 716369/716371 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 77976 event pairs, 1742 based on Foata normal form. 2/11946 useless extension candidates. Maximal degree in co-relation 105819. Up to 9649 conditions per place. [2024-06-27 19:12:41,404 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 453 selfloop transitions, 268 changer transitions 0/730 dead transitions. [2024-06-27 19:12:41,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 730 transitions, 14401 flow [2024-06-27 19:12:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:12:41,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:12:41,405 INFO L175 Difference]: Start difference. First operand has 338 places, 682 transitions, 11860 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:12:41,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 730 transitions, 14401 flow [2024-06-27 19:12:44,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 730 transitions, 14034 flow, removed 135 selfloop flow, removed 2 redundant places. [2024-06-27 19:12:44,792 INFO L231 Difference]: Finished difference. Result has 346 places, 695 transitions, 12612 flow [2024-06-27 19:12:44,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11569, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12612, PETRI_PLACES=346, PETRI_TRANSITIONS=695} [2024-06-27 19:12:44,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 293 predicate places. [2024-06-27 19:12:44,793 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 695 transitions, 12612 flow [2024-06-27 19:12:44,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:44,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:44,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:44,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:12:44,794 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:44,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1269518459, now seen corresponding path program 1 times [2024-06-27 19:12:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645558007] [2024-06-27 19:12:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:45,296 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 19:12:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645558007] [2024-06-27 19:12:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645558007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:45,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:45,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:45,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426292283] [2024-06-27 19:12:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:45,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:45,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 695 transitions, 12612 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:45,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:45,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:45,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:48,683 INFO L124 PetriNetUnfolderBase]: 7914/12208 cut-off events. [2024-06-27 19:12:48,683 INFO L125 PetriNetUnfolderBase]: For 723416/723418 co-relation queries the response was YES. [2024-06-27 19:12:48,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108255 conditions, 12208 events. 7914/12208 cut-off events. For 723416/723418 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 78354 event pairs, 1951 based on Foata normal form. 2/12003 useless extension candidates. Maximal degree in co-relation 108086. Up to 10958 conditions per place. [2024-06-27 19:12:48,891 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 620 selfloop transitions, 116 changer transitions 0/745 dead transitions. [2024-06-27 19:12:48,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 745 transitions, 14464 flow [2024-06-27 19:12:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:12:48,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:12:48,893 INFO L175 Difference]: Start difference. First operand has 346 places, 695 transitions, 12612 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:12:48,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 745 transitions, 14464 flow [2024-06-27 19:12:52,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 745 transitions, 13996 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 19:12:52,959 INFO L231 Difference]: Finished difference. Result has 352 places, 701 transitions, 12570 flow [2024-06-27 19:12:52,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12147, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12570, PETRI_PLACES=352, PETRI_TRANSITIONS=701} [2024-06-27 19:12:52,960 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 299 predicate places. [2024-06-27 19:12:52,960 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 701 transitions, 12570 flow [2024-06-27 19:12:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:52,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:52,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:52,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:12:52,961 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:52,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash -880787233, now seen corresponding path program 2 times [2024-06-27 19:12:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:52,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086474086] [2024-06-27 19:12:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:53,514 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 19:12:53,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086474086] [2024-06-27 19:12:53,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086474086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:53,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:53,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149980955] [2024-06-27 19:12:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:53,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:53,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:12:53,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 701 transitions, 12570 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:12:53,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:56,955 INFO L124 PetriNetUnfolderBase]: 7968/12301 cut-off events. [2024-06-27 19:12:56,955 INFO L125 PetriNetUnfolderBase]: For 738216/738218 co-relation queries the response was YES. [2024-06-27 19:12:57,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108421 conditions, 12301 events. 7968/12301 cut-off events. For 738216/738218 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 79060 event pairs, 1928 based on Foata normal form. 2/12092 useless extension candidates. Maximal degree in co-relation 108250. Up to 10968 conditions per place. [2024-06-27 19:12:57,295 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 621 selfloop transitions, 122 changer transitions 0/752 dead transitions. [2024-06-27 19:12:57,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 752 transitions, 14722 flow [2024-06-27 19:12:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:12:57,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:12:57,296 INFO L175 Difference]: Start difference. First operand has 352 places, 701 transitions, 12570 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:12:57,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 752 transitions, 14722 flow [2024-06-27 19:13:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 752 transitions, 14477 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:13:00,805 INFO L231 Difference]: Finished difference. Result has 357 places, 710 transitions, 12919 flow [2024-06-27 19:13:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12325, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12919, PETRI_PLACES=357, PETRI_TRANSITIONS=710} [2024-06-27 19:13:00,806 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 304 predicate places. [2024-06-27 19:13:00,806 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 710 transitions, 12919 flow [2024-06-27 19:13:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:13:00,807 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:13:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 677440601, now seen corresponding path program 3 times [2024-06-27 19:13:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902794777] [2024-06-27 19:13:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:01,348 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 19:13:01,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:01,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902794777] [2024-06-27 19:13:01,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902794777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:01,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:01,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:13:01,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882110874] [2024-06-27 19:13:01,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:13:01,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:01,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:13:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:13:01,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:13:01,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 710 transitions, 12919 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:01,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:01,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:13:01,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:04,668 INFO L124 PetriNetUnfolderBase]: 8097/12486 cut-off events. [2024-06-27 19:13:04,668 INFO L125 PetriNetUnfolderBase]: For 777694/777696 co-relation queries the response was YES. [2024-06-27 19:13:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111385 conditions, 12486 events. 8097/12486 cut-off events. For 777694/777696 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 80284 event pairs, 1926 based on Foata normal form. 2/12280 useless extension candidates. Maximal degree in co-relation 111212. Up to 10996 conditions per place. [2024-06-27 19:13:04,991 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 611 selfloop transitions, 148 changer transitions 0/768 dead transitions. [2024-06-27 19:13:04,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 768 transitions, 15519 flow [2024-06-27 19:13:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:13:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:13:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:13:04,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2024-06-27 19:13:04,992 INFO L175 Difference]: Start difference. First operand has 357 places, 710 transitions, 12919 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:13:04,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 768 transitions, 15519 flow [2024-06-27 19:13:08,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 768 transitions, 15223 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:13:08,226 INFO L231 Difference]: Finished difference. Result has 362 places, 731 transitions, 13759 flow [2024-06-27 19:13:08,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12623, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13759, PETRI_PLACES=362, PETRI_TRANSITIONS=731} [2024-06-27 19:13:08,227 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 309 predicate places. [2024-06-27 19:13:08,227 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 731 transitions, 13759 flow [2024-06-27 19:13:08,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:08,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:08,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:13:08,227 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:13:08,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash -709808541, now seen corresponding path program 4 times [2024-06-27 19:13:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:08,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793426194] [2024-06-27 19:13:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:08,708 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 19:13:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793426194] [2024-06-27 19:13:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793426194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:13:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31784266] [2024-06-27 19:13:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:08,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:13:08,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:08,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:13:08,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:13:08,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:13:08,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 731 transitions, 13759 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:13:08,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:12,104 INFO L124 PetriNetUnfolderBase]: 8127/12504 cut-off events. [2024-06-27 19:13:12,104 INFO L125 PetriNetUnfolderBase]: For 793508/793508 co-relation queries the response was YES. [2024-06-27 19:13:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112609 conditions, 12504 events. 8127/12504 cut-off events. For 793508/793508 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 80251 event pairs, 1936 based on Foata normal form. 2/12298 useless extension candidates. Maximal degree in co-relation 112433. Up to 11248 conditions per place. [2024-06-27 19:13:12,284 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 644 selfloop transitions, 123 changer transitions 0/776 dead transitions. [2024-06-27 19:13:12,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 776 transitions, 15660 flow [2024-06-27 19:13:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:13:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:13:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:13:12,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:13:12,292 INFO L175 Difference]: Start difference. First operand has 362 places, 731 transitions, 13759 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:13:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 776 transitions, 15660 flow [2024-06-27 19:13:15,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 776 transitions, 15234 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 19:13:15,802 INFO L231 Difference]: Finished difference. Result has 366 places, 737 transitions, 13774 flow [2024-06-27 19:13:15,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=13347, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13774, PETRI_PLACES=366, PETRI_TRANSITIONS=737} [2024-06-27 19:13:15,803 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 313 predicate places. [2024-06-27 19:13:15,803 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 737 transitions, 13774 flow [2024-06-27 19:13:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:15,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:15,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:13:15,803 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:13:15,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1793636275, now seen corresponding path program 5 times [2024-06-27 19:13:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:15,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848263794] [2024-06-27 19:13:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:16,347 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 19:13:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848263794] [2024-06-27 19:13:16,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848263794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:16,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:16,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:13:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110369229] [2024-06-27 19:13:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:13:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:13:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:13:16,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:13:16,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 737 transitions, 13774 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:16,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:16,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:13:16,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand