./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_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/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:30:19,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:30:19,306 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:30:19,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:30:19,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:30:19,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:30:19,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:30:19,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:30:19,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:30:19,337 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:30:19,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:30:19,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:30:19,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:30:19,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:30:19,339 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:30:19,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:30:19,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:30:19,340 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:30:19,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:30:19,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:30:19,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:30:19,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:30:19,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:30:19,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:30:19,342 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:30:19,342 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:30:19,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:30:19,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:30:19,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:30:19,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:30:19,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:30:19,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:30:19,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:30:19,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:30:19,345 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:30:19,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:30:19,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:30:19,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:30:19,346 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:30:19,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:30:19,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:30:19,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:30:19,569 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:30:19,569 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:30:19,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 23:30:20,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:30:20,877 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:30:20,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 23:30:20,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172c90f41/93a9d7c651e54cd9bd2c044b104bcc98/FLAGbc7ddd259 [2024-06-27 23:30:20,906 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172c90f41/93a9d7c651e54cd9bd2c044b104bcc98 [2024-06-27 23:30:20,908 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:30:20,909 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:30:20,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 23:30:20,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:30:20,993 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:30:20,994 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:30:20,994 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:30:20,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:30:20,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:30:20" (1/2) ... [2024-06-27 23:30:21,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5403024a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:30:20, skipping insertion in model container [2024-06-27 23:30:21,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:30:20" (1/2) ... [2024-06-27 23:30:21,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cb092ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:30:21, skipping insertion in model container [2024-06-27 23:30:21,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:30:20" (2/2) ... [2024-06-27 23:30:21,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5403024a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:30:21, skipping insertion in model container [2024-06-27 23:30:21,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:30:20" (2/2) ... [2024-06-27 23:30:21,004 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:30:21,027 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:30:21,028 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:30:21,029 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:30:21,029 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:30:21,029 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:30:21,029 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-27 23:30:21,074 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:30:21,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:30:21,412 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:30:21,584 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:30:21,612 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:30:21,614 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:30:21 WrapperNode [2024-06-27 23:30:21,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:30:21,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:30:21,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:30:21,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:30:21,621 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,643 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,692 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-27 23:30:21,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:30:21,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:30:21,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:30:21,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:30:21,702 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,702 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,706 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,722 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 23:30:21,723 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,723 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,732 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,734 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,736 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,738 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:30:21,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:30:21,743 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:30:21,743 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:30:21,744 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 11:30:21" (1/1) ... [2024-06-27 23:30:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:30:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:30:21,774 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 23:30:21,776 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 23:30:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:30:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:30:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:30:21,809 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:30:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:30:21,809 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:30:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:30:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:30:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:30:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:30:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:30:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:30:21,811 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 23:30:21,954 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:30:21,957 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:30:22,419 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:30:22,420 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:30:22,585 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:30:22,585 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:30:22,585 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:30:22 BoogieIcfgContainer [2024-06-27 23:30:22,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:30:22,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:30:22,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:30:22,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:30:22,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:30:20" (1/4) ... [2024-06-27 23:30:22,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aab9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:30:22, skipping insertion in model container [2024-06-27 23:30:22,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:30:20" (2/4) ... [2024-06-27 23:30:22,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aab9d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:30:22, skipping insertion in model container [2024-06-27 23:30:22,591 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 11:30:21" (3/4) ... [2024-06-27 23:30:22,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aab9d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:30:22, skipping insertion in model container [2024-06-27 23:30:22,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:30:22" (4/4) ... [2024-06-27 23:30:22,596 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-27 23:30:22,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:30:22,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:30:22,610 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:30:22,651 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:30:22,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:30:22,714 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 23:30:22,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:30:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:30:22,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 23:30:22,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 23:30:22,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:30:22,753 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;@12f386aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:30:22,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:30:22,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:30:22,758 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:30:22,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:30:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:22,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:30:22,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:22,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash 372387487, now seen corresponding path program 1 times [2024-06-27 23:30:22,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:22,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828945458] [2024-06-27 23:30:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:23,958 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 23:30:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828945458] [2024-06-27 23:30:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828945458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:23,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:30:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759939177] [2024-06-27 23:30:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:23,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:30:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:30:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:30:24,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 23:30:24,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:24,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:24,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 23:30:24,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:24,459 INFO L124 PetriNetUnfolderBase]: 1407/2253 cut-off events. [2024-06-27 23:30:24,459 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 23:30:24,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2253 events. 1407/2253 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11626 event pairs, 989 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 4445. Up to 2105 conditions per place. [2024-06-27 23:30:24,475 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 23:30:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 23:30:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:30:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:30:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 23:30:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 23:30:24,487 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 23:30:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 23:30:24,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:24,493 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 23:30:24,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 23:30:24,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 23:30:24,498 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 23:30:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:24,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:24,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:30:24,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:24,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1382137662, now seen corresponding path program 1 times [2024-06-27 23:30:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:24,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509128743] [2024-06-27 23:30:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:24,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:25,337 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 23:30:25,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:25,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509128743] [2024-06-27 23:30:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509128743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:25,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:25,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:30:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318527340] [2024-06-27 23:30:25,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:30:25,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:30:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:30:25,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 23:30:25,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:25,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:25,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 23:30:25,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:25,739 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-27 23:30:25,740 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-27 23:30:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 2544 events. 1653/2544 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12794 event pairs, 1038 based on Foata normal form. 3/2544 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-27 23:30:25,753 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 23:30:25,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-27 23:30:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:30:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:30:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 23:30:25,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-27 23:30:25,756 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-27 23:30:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-27 23:30:25,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:30:25,763 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 23:30:25,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 23:30:25,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 23:30:25,764 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 23:30:25,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:25,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:25,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:25,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:30:25,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:25,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash -103403870, now seen corresponding path program 1 times [2024-06-27 23:30:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279891473] [2024-06-27 23:30:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279891473] [2024-06-27 23:30:26,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279891473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:26,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:26,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:30:26,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038143255] [2024-06-27 23:30:26,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:26,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:30:26,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:30:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:30:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:30:26,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:26,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:26,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:30:26,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:27,135 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-27 23:30:27,136 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-27 23:30:27,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 2973 events. 1947/2973 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14718 event pairs, 1135 based on Foata normal form. 3/2973 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-27 23:30:27,149 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 23:30:27,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-27 23:30:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:30:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:30:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 23:30:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-27 23:30:27,151 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-27 23:30:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-27 23:30:27,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:27,153 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 23:30:27,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 23:30:27,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 23:30:27,154 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 23:30:27,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:27,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:27,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:27,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:30:27,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:27,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2086851605, now seen corresponding path program 1 times [2024-06-27 23:30:27,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:27,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556544629] [2024-06-27 23:30:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:28,035 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 23:30:28,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:28,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556544629] [2024-06-27 23:30:28,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556544629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:30:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156571192] [2024-06-27 23:30:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:30:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:30:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:30:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:30:28,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:28,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:28,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:30:28,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:28,590 INFO L124 PetriNetUnfolderBase]: 1941/2964 cut-off events. [2024-06-27 23:30:28,591 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2024-06-27 23:30:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 2964 events. 1941/2964 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14663 event pairs, 989 based on Foata normal form. 3/2965 useless extension candidates. Maximal degree in co-relation 8034. Up to 2829 conditions per place. [2024-06-27 23:30:28,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 23:30:28,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 402 flow [2024-06-27 23:30:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:30:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:30:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 23:30:28,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2024-06-27 23:30:28,610 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 143 transitions. [2024-06-27 23:30:28,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 402 flow [2024-06-27 23:30:28,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:28,614 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-27 23:30:28,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 23:30:28,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 23:30:28,616 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-27 23:30:28,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:28,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:28,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:30:28,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:28,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash -586820063, now seen corresponding path program 1 times [2024-06-27 23:30:28,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:28,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673111637] [2024-06-27 23:30:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:28,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:29,784 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 23:30:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673111637] [2024-06-27 23:30:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673111637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:29,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:29,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734349524] [2024-06-27 23:30:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:29,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:30:29,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:29,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:29,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:30:29,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:30,388 INFO L124 PetriNetUnfolderBase]: 1935/2939 cut-off events. [2024-06-27 23:30:30,389 INFO L125 PetriNetUnfolderBase]: For 4530/4530 co-relation queries the response was YES. [2024-06-27 23:30:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8670 conditions, 2939 events. 1935/2939 cut-off events. For 4530/4530 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14458 event pairs, 843 based on Foata normal form. 3/2940 useless extension candidates. Maximal degree in co-relation 8654. Up to 2805 conditions per place. [2024-06-27 23:30:30,405 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 62 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-27 23:30:30,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 84 transitions, 480 flow [2024-06-27 23:30:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:30:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:30:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 23:30:30,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481727574750831 [2024-06-27 23:30:30,407 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 7 states and 165 transitions. [2024-06-27 23:30:30,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 84 transitions, 480 flow [2024-06-27 23:30:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 446 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:30:30,410 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 248 flow [2024-06-27 23:30:30,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 23:30:30,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-27 23:30:30,411 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 248 flow [2024-06-27 23:30:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:30,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:30:30,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:30,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1624971842, now seen corresponding path program 1 times [2024-06-27 23:30:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252018169] [2024-06-27 23:30:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:31,278 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 23:30:31,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252018169] [2024-06-27 23:30:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252018169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:31,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:31,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:30:31,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58356263] [2024-06-27 23:30:31,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:30:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:30:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:30:31,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:30:31,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:31,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:31,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:30:31,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:31,750 INFO L124 PetriNetUnfolderBase]: 1556/2546 cut-off events. [2024-06-27 23:30:31,750 INFO L125 PetriNetUnfolderBase]: For 5369/5369 co-relation queries the response was YES. [2024-06-27 23:30:31,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7889 conditions, 2546 events. 1556/2546 cut-off events. For 5369/5369 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13467 event pairs, 678 based on Foata normal form. 2/2504 useless extension candidates. Maximal degree in co-relation 7871. Up to 2304 conditions per place. [2024-06-27 23:30:31,764 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 23:30:31,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 414 flow [2024-06-27 23:30:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:30:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:30:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 23:30:31,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-06-27 23:30:31,767 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 248 flow. Second operand 5 states and 107 transitions. [2024-06-27 23:30:31,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 414 flow [2024-06-27 23:30:31,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 368 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 23:30:31,771 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 269 flow [2024-06-27 23:30:31,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-27 23:30:31,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-27 23:30:31,772 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 269 flow [2024-06-27 23:30:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:31,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:31,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:30:31,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1165481396, now seen corresponding path program 1 times [2024-06-27 23:30:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201137696] [2024-06-27 23:30:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:32,804 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 23:30:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201137696] [2024-06-27 23:30:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201137696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:30:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349932012] [2024-06-27 23:30:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:30:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:30:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:30:32,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:30:32,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:32,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:32,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:30:32,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:33,452 INFO L124 PetriNetUnfolderBase]: 1842/2876 cut-off events. [2024-06-27 23:30:33,453 INFO L125 PetriNetUnfolderBase]: For 8222/8222 co-relation queries the response was YES. [2024-06-27 23:30:33,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2876 events. 1842/2876 cut-off events. For 8222/8222 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14509 event pairs, 802 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 9593. Up to 2684 conditions per place. [2024-06-27 23:30:33,471 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 55 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-27 23:30:33,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 539 flow [2024-06-27 23:30:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:30:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:30:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:30:33,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 23:30:33,473 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 269 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:30:33,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 539 flow [2024-06-27 23:30:33,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 515 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:33,477 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 378 flow [2024-06-27 23:30:33,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-27 23:30:33,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-27 23:30:33,479 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 378 flow [2024-06-27 23:30:33,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:33,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:33,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:33,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:30:33,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:33,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1769909055, now seen corresponding path program 1 times [2024-06-27 23:30:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:33,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013162343] [2024-06-27 23:30:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:34,395 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 23:30:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:34,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013162343] [2024-06-27 23:30:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013162343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:34,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:34,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:30:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350210796] [2024-06-27 23:30:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:34,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:30:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:30:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:30:34,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:30:34,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 378 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:34,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:34,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:30:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:35,027 INFO L124 PetriNetUnfolderBase]: 1914/3002 cut-off events. [2024-06-27 23:30:35,028 INFO L125 PetriNetUnfolderBase]: For 12233/12243 co-relation queries the response was YES. [2024-06-27 23:30:35,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 3002 events. 1914/3002 cut-off events. For 12233/12243 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15195 event pairs, 808 based on Foata normal form. 2/2990 useless extension candidates. Maximal degree in co-relation 11099. Up to 2787 conditions per place. [2024-06-27 23:30:35,046 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-27 23:30:35,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 624 flow [2024-06-27 23:30:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:30:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:30:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 23:30:35,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 23:30:35,049 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 378 flow. Second operand 7 states and 135 transitions. [2024-06-27 23:30:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 624 flow [2024-06-27 23:30:35,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 603 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:35,056 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 461 flow [2024-06-27 23:30:35,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-27 23:30:35,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 23:30:35,058 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 461 flow [2024-06-27 23:30:35,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:35,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:35,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:35,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:30:35,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1770175965, now seen corresponding path program 2 times [2024-06-27 23:30:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804319409] [2024-06-27 23:30:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:36,091 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 23:30:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:36,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804319409] [2024-06-27 23:30:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804319409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:36,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:36,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:30:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361068205] [2024-06-27 23:30:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:30:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:30:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:30:36,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:30:36,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:36,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:36,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:30:36,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:36,740 INFO L124 PetriNetUnfolderBase]: 1925/3020 cut-off events. [2024-06-27 23:30:36,740 INFO L125 PetriNetUnfolderBase]: For 15320/15336 co-relation queries the response was YES. [2024-06-27 23:30:36,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11912 conditions, 3020 events. 1925/3020 cut-off events. For 15320/15336 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15300 event pairs, 813 based on Foata normal form. 6/3011 useless extension candidates. Maximal degree in co-relation 11884. Up to 2774 conditions per place. [2024-06-27 23:30:36,758 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2024-06-27 23:30:36,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 767 flow [2024-06-27 23:30:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:30:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:30:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 23:30:36,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 23:30:36,762 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 461 flow. Second operand 6 states and 126 transitions. [2024-06-27 23:30:36,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 767 flow [2024-06-27 23:30:36,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 731 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:36,771 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 553 flow [2024-06-27 23:30:36,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 23:30:36,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-27 23:30:36,772 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 553 flow [2024-06-27 23:30:36,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:36,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:36,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:36,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:30:36,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:36,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:36,773 INFO L85 PathProgramCache]: Analyzing trace with hash 230431005, now seen corresponding path program 3 times [2024-06-27 23:30:36,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:36,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311047721] [2024-06-27 23:30:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:37,721 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 23:30:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:37,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311047721] [2024-06-27 23:30:37,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311047721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:37,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:37,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:30:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45802675] [2024-06-27 23:30:37,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:37,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:30:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:30:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:30:37,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:30:37,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:37,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:37,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:30:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:38,358 INFO L124 PetriNetUnfolderBase]: 1934/3032 cut-off events. [2024-06-27 23:30:38,358 INFO L125 PetriNetUnfolderBase]: For 18811/18823 co-relation queries the response was YES. [2024-06-27 23:30:38,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12611 conditions, 3032 events. 1934/3032 cut-off events. For 18811/18823 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15322 event pairs, 807 based on Foata normal form. 2/3021 useless extension candidates. Maximal degree in co-relation 12581. Up to 2809 conditions per place. [2024-06-27 23:30:38,378 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-27 23:30:38,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 844 flow [2024-06-27 23:30:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:30:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:30:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:30:38,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-27 23:30:38,380 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 553 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:30:38,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 844 flow [2024-06-27 23:30:38,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 785 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:38,391 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 615 flow [2024-06-27 23:30:38,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=615, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-27 23:30:38,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-27 23:30:38,392 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 615 flow [2024-06-27 23:30:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:38,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:38,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:30:38,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:38,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -253825432, now seen corresponding path program 1 times [2024-06-27 23:30:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:38,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038429368] [2024-06-27 23:30:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:39,786 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 23:30:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038429368] [2024-06-27 23:30:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038429368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:30:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193439731] [2024-06-27 23:30:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:30:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:30:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:30:39,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 23:30:39,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:39,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:39,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 23:30:39,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:40,394 INFO L124 PetriNetUnfolderBase]: 2034/3106 cut-off events. [2024-06-27 23:30:40,394 INFO L125 PetriNetUnfolderBase]: For 21178/21190 co-relation queries the response was YES. [2024-06-27 23:30:40,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13214 conditions, 3106 events. 2034/3106 cut-off events. For 21178/21190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15188 event pairs, 645 based on Foata normal form. 6/3085 useless extension candidates. Maximal degree in co-relation 13182. Up to 2881 conditions per place. [2024-06-27 23:30:40,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-27 23:30:40,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 985 flow [2024-06-27 23:30:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 23:30:40,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-27 23:30:40,414 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 615 flow. Second operand 8 states and 183 transitions. [2024-06-27 23:30:40,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 985 flow [2024-06-27 23:30:40,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 927 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:30:40,425 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 642 flow [2024-06-27 23:30:40,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-27 23:30:40,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-27 23:30:40,425 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 642 flow [2024-06-27 23:30:40,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:40,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:40,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:30:40,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:40,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1770185885, now seen corresponding path program 1 times [2024-06-27 23:30:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:40,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398016611] [2024-06-27 23:30:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:41,949 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 23:30:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398016611] [2024-06-27 23:30:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398016611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:30:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668667322] [2024-06-27 23:30:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:30:41,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:30:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:30:42,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:30:42,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 642 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:42,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:42,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:30:42,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:42,727 INFO L124 PetriNetUnfolderBase]: 1869/2943 cut-off events. [2024-06-27 23:30:42,728 INFO L125 PetriNetUnfolderBase]: For 24486/24486 co-relation queries the response was YES. [2024-06-27 23:30:42,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 2943 events. 1869/2943 cut-off events. For 24486/24486 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14958 event pairs, 733 based on Foata normal form. 3/2944 useless extension candidates. Maximal degree in co-relation 13041. Up to 2722 conditions per place. [2024-06-27 23:30:42,744 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 81 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-27 23:30:42,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 988 flow [2024-06-27 23:30:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 23:30:42,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:30:42,746 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 642 flow. Second operand 8 states and 156 transitions. [2024-06-27 23:30:42,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 988 flow [2024-06-27 23:30:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 909 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:30:42,760 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 662 flow [2024-06-27 23:30:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=662, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-27 23:30:42,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 23:30:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 662 flow [2024-06-27 23:30:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:30:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:42,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:30:42,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1195474085, now seen corresponding path program 1 times [2024-06-27 23:30:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561363803] [2024-06-27 23:30:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:43,720 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 23:30:43,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:43,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561363803] [2024-06-27 23:30:43,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561363803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:43,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215895716] [2024-06-27 23:30:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:43,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:43,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 662 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:43,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:43,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:44,433 INFO L124 PetriNetUnfolderBase]: 2107/3200 cut-off events. [2024-06-27 23:30:44,433 INFO L125 PetriNetUnfolderBase]: For 31668/31685 co-relation queries the response was YES. [2024-06-27 23:30:44,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 3200 events. 2107/3200 cut-off events. For 31668/31685 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15538 event pairs, 798 based on Foata normal form. 3/3175 useless extension candidates. Maximal degree in co-relation 14995. Up to 3004 conditions per place. [2024-06-27 23:30:44,451 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-06-27 23:30:44,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1000 flow [2024-06-27 23:30:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 23:30:44,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 23:30:44,453 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 662 flow. Second operand 8 states and 148 transitions. [2024-06-27 23:30:44,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1000 flow [2024-06-27 23:30:44,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 931 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 23:30:44,466 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 728 flow [2024-06-27 23:30:44,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=728, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-27 23:30:44,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 23:30:44,467 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 728 flow [2024-06-27 23:30:44,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:44,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:44,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:44,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:30:44,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:44,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452243, now seen corresponding path program 2 times [2024-06-27 23:30:44,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:44,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073466225] [2024-06-27 23:30:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:44,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:45,498 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 23:30:45,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:45,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073466225] [2024-06-27 23:30:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073466225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:45,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:45,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395290444] [2024-06-27 23:30:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:45,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:45,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:45,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:45,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:45,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:45,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:46,149 INFO L124 PetriNetUnfolderBase]: 2118/3216 cut-off events. [2024-06-27 23:30:46,149 INFO L125 PetriNetUnfolderBase]: For 36699/36718 co-relation queries the response was YES. [2024-06-27 23:30:46,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 3216 events. 2118/3216 cut-off events. For 36699/36718 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15634 event pairs, 798 based on Foata normal form. 3/3191 useless extension candidates. Maximal degree in co-relation 15737. Up to 2994 conditions per place. [2024-06-27 23:30:46,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 33 changer transitions 0/121 dead transitions. [2024-06-27 23:30:46,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 1054 flow [2024-06-27 23:30:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:30:46,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 23:30:46,168 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 728 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:30:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 1054 flow [2024-06-27 23:30:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 993 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:46,183 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 792 flow [2024-06-27 23:30:46,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=792, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-27 23:30:46,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 23:30:46,184 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 792 flow [2024-06-27 23:30:46,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:46,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:46,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:46,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:30:46,184 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:46,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452491, now seen corresponding path program 1 times [2024-06-27 23:30:46,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:46,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573416209] [2024-06-27 23:30:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:47,273 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 23:30:47,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573416209] [2024-06-27 23:30:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573416209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586734012] [2024-06-27 23:30:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:47,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:47,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 792 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:47,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:47,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:47,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:48,021 INFO L124 PetriNetUnfolderBase]: 2230/3356 cut-off events. [2024-06-27 23:30:48,021 INFO L125 PetriNetUnfolderBase]: For 43611/43615 co-relation queries the response was YES. [2024-06-27 23:30:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3356 events. 2230/3356 cut-off events. For 43611/43615 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16199 event pairs, 824 based on Foata normal form. 7/3360 useless extension candidates. Maximal degree in co-relation 17050. Up to 3189 conditions per place. [2024-06-27 23:30:48,036 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 34 changer transitions 0/137 dead transitions. [2024-06-27 23:30:48,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1328 flow [2024-06-27 23:30:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:30:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 23:30:48,038 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 792 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:30:48,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1328 flow [2024-06-27 23:30:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1229 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:30:48,054 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 934 flow [2024-06-27 23:30:48,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-27 23:30:48,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-27 23:30:48,055 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 934 flow [2024-06-27 23:30:48,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:48,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:48,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:30:48,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:48,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -958822317, now seen corresponding path program 2 times [2024-06-27 23:30:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:48,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433684220] [2024-06-27 23:30:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:49,224 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 23:30:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433684220] [2024-06-27 23:30:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433684220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:49,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:49,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213145232] [2024-06-27 23:30:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:49,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:49,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:49,937 INFO L124 PetriNetUnfolderBase]: 2256/3395 cut-off events. [2024-06-27 23:30:49,938 INFO L125 PetriNetUnfolderBase]: For 51890/51898 co-relation queries the response was YES. [2024-06-27 23:30:49,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18419 conditions, 3395 events. 2256/3395 cut-off events. For 51890/51898 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16464 event pairs, 822 based on Foata normal form. 11/3402 useless extension candidates. Maximal degree in co-relation 18378. Up to 3119 conditions per place. [2024-06-27 23:30:49,955 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 84 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-27 23:30:49,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 1544 flow [2024-06-27 23:30:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:30:49,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:30:49,956 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 934 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:30:49,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 1544 flow [2024-06-27 23:30:49,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1488 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 23:30:49,978 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1188 flow [2024-06-27 23:30:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-27 23:30:49,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 23:30:49,979 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1188 flow [2024-06-27 23:30:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:49,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:49,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:30:49,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:49,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1401995293, now seen corresponding path program 3 times [2024-06-27 23:30:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:49,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191741407] [2024-06-27 23:30:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:51,086 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 23:30:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191741407] [2024-06-27 23:30:51,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191741407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:51,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:51,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744974199] [2024-06-27 23:30:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:51,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:51,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1188 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:51,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:51,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:51,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:51,782 INFO L124 PetriNetUnfolderBase]: 2233/3371 cut-off events. [2024-06-27 23:30:51,783 INFO L125 PetriNetUnfolderBase]: For 59518/59567 co-relation queries the response was YES. [2024-06-27 23:30:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 3371 events. 2233/3371 cut-off events. For 59518/59567 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16296 event pairs, 790 based on Foata normal form. 9/3353 useless extension candidates. Maximal degree in co-relation 19462. Up to 3070 conditions per place. [2024-06-27 23:30:51,801 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 94 selfloop transitions, 44 changer transitions 0/154 dead transitions. [2024-06-27 23:30:51,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1702 flow [2024-06-27 23:30:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 23:30:51,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 23:30:51,803 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1188 flow. Second operand 8 states and 150 transitions. [2024-06-27 23:30:51,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1702 flow [2024-06-27 23:30:51,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1617 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:51,838 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1321 flow [2024-06-27 23:30:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-27 23:30:51,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 23:30:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1321 flow [2024-06-27 23:30:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:51,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:51,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:30:51,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:51,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash -959118987, now seen corresponding path program 3 times [2024-06-27 23:30:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:51,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53344520] [2024-06-27 23:30:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:52,987 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 23:30:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53344520] [2024-06-27 23:30:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53344520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:52,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087633573] [2024-06-27 23:30:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:53,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1321 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:53,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:53,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:53,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:53,719 INFO L124 PetriNetUnfolderBase]: 2301/3459 cut-off events. [2024-06-27 23:30:53,719 INFO L125 PetriNetUnfolderBase]: For 63895/63899 co-relation queries the response was YES. [2024-06-27 23:30:53,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20295 conditions, 3459 events. 2301/3459 cut-off events. For 63895/63899 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16742 event pairs, 824 based on Foata normal form. 7/3462 useless extension candidates. Maximal degree in co-relation 20249. Up to 3164 conditions per place. [2024-06-27 23:30:53,739 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2024-06-27 23:30:53,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 164 transitions, 1934 flow [2024-06-27 23:30:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:30:53,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:30:53,741 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1321 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:30:53,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 164 transitions, 1934 flow [2024-06-27 23:30:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 164 transitions, 1858 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 23:30:53,770 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1493 flow [2024-06-27 23:30:53,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-27 23:30:53,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 23:30:53,771 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1493 flow [2024-06-27 23:30:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:53,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:53,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:30:53,771 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:53,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1446752229, now seen corresponding path program 4 times [2024-06-27 23:30:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309690374] [2024-06-27 23:30:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:30:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:54,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309690374] [2024-06-27 23:30:54,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309690374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175485641] [2024-06-27 23:30:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:54,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:54,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1493 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:54,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:54,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:54,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:55,376 INFO L124 PetriNetUnfolderBase]: 2311/3481 cut-off events. [2024-06-27 23:30:55,376 INFO L125 PetriNetUnfolderBase]: For 70554/70601 co-relation queries the response was YES. [2024-06-27 23:30:55,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21140 conditions, 3481 events. 2311/3481 cut-off events. For 70554/70601 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16845 event pairs, 780 based on Foata normal form. 7/3464 useless extension candidates. Maximal degree in co-relation 21091. Up to 3237 conditions per place. [2024-06-27 23:30:55,399 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 125 selfloop transitions, 40 changer transitions 0/183 dead transitions. [2024-06-27 23:30:55,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2045 flow [2024-06-27 23:30:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:30:55,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:30:55,400 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1493 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:30:55,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2045 flow [2024-06-27 23:30:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1927 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 23:30:55,439 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1639 flow [2024-06-27 23:30:55,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1639, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-27 23:30:55,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-27 23:30:55,439 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1639 flow [2024-06-27 23:30:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:55,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:55,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:55,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:30:55,440 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:55,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1730113435, now seen corresponding path program 5 times [2024-06-27 23:30:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:55,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145499902] [2024-06-27 23:30:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:56,263 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 23:30:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:56,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145499902] [2024-06-27 23:30:56,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145499902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:56,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:56,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:56,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779249244] [2024-06-27 23:30:56,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:56,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:56,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:56,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1639 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:56,982 INFO L124 PetriNetUnfolderBase]: 2343/3528 cut-off events. [2024-06-27 23:30:56,982 INFO L125 PetriNetUnfolderBase]: For 76723/76772 co-relation queries the response was YES. [2024-06-27 23:30:56,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21745 conditions, 3528 events. 2343/3528 cut-off events. For 76723/76772 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17073 event pairs, 780 based on Foata normal form. 9/3513 useless extension candidates. Maximal degree in co-relation 21694. Up to 3276 conditions per place. [2024-06-27 23:30:57,003 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 132 selfloop transitions, 47 changer transitions 0/197 dead transitions. [2024-06-27 23:30:57,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2275 flow [2024-06-27 23:30:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:30:57,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:30:57,005 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1639 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:30:57,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2275 flow [2024-06-27 23:30:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 2138 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 23:30:57,049 INFO L231 Difference]: Finished difference. Result has 123 places, 171 transitions, 1849 flow [2024-06-27 23:30:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1849, PETRI_PLACES=123, PETRI_TRANSITIONS=171} [2024-06-27 23:30:57,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-27 23:30:57,050 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 171 transitions, 1849 flow [2024-06-27 23:30:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:57,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:30:57,050 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1095093733, now seen corresponding path program 6 times [2024-06-27 23:30:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:57,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310006418] [2024-06-27 23:30:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:58,032 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 23:30:58,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310006418] [2024-06-27 23:30:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310006418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:58,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:58,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:58,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210160829] [2024-06-27 23:30:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:58,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:58,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:58,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 171 transitions, 1849 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:58,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:58,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:30:58,723 INFO L124 PetriNetUnfolderBase]: 2345/3532 cut-off events. [2024-06-27 23:30:58,723 INFO L125 PetriNetUnfolderBase]: For 82335/82380 co-relation queries the response was YES. [2024-06-27 23:30:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22035 conditions, 3532 events. 2345/3532 cut-off events. For 82335/82380 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17094 event pairs, 786 based on Foata normal form. 5/3513 useless extension candidates. Maximal degree in co-relation 21982. Up to 3237 conditions per place. [2024-06-27 23:30:58,747 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-27 23:30:58,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2307 flow [2024-06-27 23:30:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:30:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:30:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:30:58,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 23:30:58,748 INFO L175 Difference]: Start difference. First operand has 123 places, 171 transitions, 1849 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:30:58,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2307 flow [2024-06-27 23:30:58,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 198 transitions, 2153 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 23:30:58,849 INFO L231 Difference]: Finished difference. Result has 124 places, 174 transitions, 1855 flow [2024-06-27 23:30:58,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1855, PETRI_PLACES=124, PETRI_TRANSITIONS=174} [2024-06-27 23:30:58,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 23:30:58,849 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 174 transitions, 1855 flow [2024-06-27 23:30:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:58,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:30:58,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:30:58,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:30:58,850 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:30:58,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:30:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1095093485, now seen corresponding path program 4 times [2024-06-27 23:30:58,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:30:58,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101190568] [2024-06-27 23:30:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:30:58,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:30:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:30:59,822 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 23:30:59,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:30:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101190568] [2024-06-27 23:30:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101190568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:30:59,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:30:59,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:30:59,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220057591] [2024-06-27 23:30:59,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:30:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:30:59,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:30:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:30:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:30:59,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:30:59,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 174 transitions, 1855 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:30:59,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:30:59,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:30:59,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:00,677 INFO L124 PetriNetUnfolderBase]: 2397/3606 cut-off events. [2024-06-27 23:31:00,677 INFO L125 PetriNetUnfolderBase]: For 87703/87705 co-relation queries the response was YES. [2024-06-27 23:31:00,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22543 conditions, 3606 events. 2397/3606 cut-off events. For 87703/87705 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17585 event pairs, 833 based on Foata normal form. 5/3609 useless extension candidates. Maximal degree in co-relation 22491. Up to 3392 conditions per place. [2024-06-27 23:31:00,703 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 145 selfloop transitions, 46 changer transitions 0/213 dead transitions. [2024-06-27 23:31:00,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2618 flow [2024-06-27 23:31:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:31:00,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 23:31:00,705 INFO L175 Difference]: Start difference. First operand has 124 places, 174 transitions, 1855 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:31:00,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2618 flow [2024-06-27 23:31:00,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 2394 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 23:31:00,763 INFO L231 Difference]: Finished difference. Result has 126 places, 185 transitions, 1898 flow [2024-06-27 23:31:00,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1898, PETRI_PLACES=126, PETRI_TRANSITIONS=185} [2024-06-27 23:31:00,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 23:31:00,763 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 185 transitions, 1898 flow [2024-06-27 23:31:00,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 23:31:00,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:00,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:31:00,763 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:00,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash -958811405, now seen corresponding path program 1 times [2024-06-27 23:31:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236451416] [2024-06-27 23:31:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:02,281 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 23:31:02,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:02,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236451416] [2024-06-27 23:31:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236451416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:02,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:02,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:02,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581105652] [2024-06-27 23:31:02,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:02,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:31:02,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 185 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:02,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:02,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:31:02,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:03,087 INFO L124 PetriNetUnfolderBase]: 2113/3324 cut-off events. [2024-06-27 23:31:03,087 INFO L125 PetriNetUnfolderBase]: For 82227/82227 co-relation queries the response was YES. [2024-06-27 23:31:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20547 conditions, 3324 events. 2113/3324 cut-off events. For 82227/82227 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17035 event pairs, 718 based on Foata normal form. 6/3328 useless extension candidates. Maximal degree in co-relation 20493. Up to 3015 conditions per place. [2024-06-27 23:31:03,108 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 164 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-27 23:31:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 213 transitions, 2502 flow [2024-06-27 23:31:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:31:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 23:31:03,109 INFO L175 Difference]: Start difference. First operand has 126 places, 185 transitions, 1898 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:31:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 213 transitions, 2502 flow [2024-06-27 23:31:03,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 213 transitions, 2349 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 23:31:03,160 INFO L231 Difference]: Finished difference. Result has 126 places, 188 transitions, 1865 flow [2024-06-27 23:31:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1865, PETRI_PLACES=126, PETRI_TRANSITIONS=188} [2024-06-27 23:31:03,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 23:31:03,161 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 188 transitions, 1865 flow [2024-06-27 23:31:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:03,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:31:03,161 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:03,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1404750099, now seen corresponding path program 1 times [2024-06-27 23:31:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327856725] [2024-06-27 23:31:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:04,136 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 23:31:04,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327856725] [2024-06-27 23:31:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327856725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:04,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:04,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:31:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793067597] [2024-06-27 23:31:04,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:04,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:31:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:31:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:31:04,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:31:04,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 188 transitions, 1865 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:04,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:04,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:31:04,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:04,805 INFO L124 PetriNetUnfolderBase]: 2111/3320 cut-off events. [2024-06-27 23:31:04,805 INFO L125 PetriNetUnfolderBase]: For 86307/86307 co-relation queries the response was YES. [2024-06-27 23:31:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20861 conditions, 3320 events. 2111/3320 cut-off events. For 86307/86307 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16932 event pairs, 737 based on Foata normal form. 1/3319 useless extension candidates. Maximal degree in co-relation 20809. Up to 3084 conditions per place. [2024-06-27 23:31:04,827 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 162 selfloop transitions, 10 changer transitions 0/195 dead transitions. [2024-06-27 23:31:04,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 195 transitions, 2231 flow [2024-06-27 23:31:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:31:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:31:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 23:31:04,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:31:04,828 INFO L175 Difference]: Start difference. First operand has 126 places, 188 transitions, 1865 flow. Second operand 5 states and 98 transitions. [2024-06-27 23:31:04,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 195 transitions, 2231 flow [2024-06-27 23:31:04,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 195 transitions, 2125 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:04,882 INFO L231 Difference]: Finished difference. Result has 125 places, 188 transitions, 1787 flow [2024-06-27 23:31:04,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1787, PETRI_PLACES=125, PETRI_TRANSITIONS=188} [2024-06-27 23:31:04,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-27 23:31:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 188 transitions, 1787 flow [2024-06-27 23:31:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:04,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:04,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:31:04,883 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1594860028, now seen corresponding path program 1 times [2024-06-27 23:31:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173513692] [2024-06-27 23:31:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:05,972 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 23:31:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173513692] [2024-06-27 23:31:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173513692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:05,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:05,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669767169] [2024-06-27 23:31:05,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:05,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:05,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:06,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:06,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 188 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:06,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:06,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:06,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:06,893 INFO L124 PetriNetUnfolderBase]: 2417/3659 cut-off events. [2024-06-27 23:31:06,893 INFO L125 PetriNetUnfolderBase]: For 107920/107922 co-relation queries the response was YES. [2024-06-27 23:31:06,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 3659 events. 2417/3659 cut-off events. For 107920/107922 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17839 event pairs, 775 based on Foata normal form. 6/3659 useless extension candidates. Maximal degree in co-relation 23573. Up to 3303 conditions per place. [2024-06-27 23:31:06,914 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 155 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-27 23:31:06,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 224 transitions, 2371 flow [2024-06-27 23:31:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 23:31:06,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:31:06,915 INFO L175 Difference]: Start difference. First operand has 125 places, 188 transitions, 1787 flow. Second operand 9 states and 172 transitions. [2024-06-27 23:31:06,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 224 transitions, 2371 flow [2024-06-27 23:31:06,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 224 transitions, 2350 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:06,977 INFO L231 Difference]: Finished difference. Result has 131 places, 199 transitions, 1978 flow [2024-06-27 23:31:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1978, PETRI_PLACES=131, PETRI_TRANSITIONS=199} [2024-06-27 23:31:06,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 23:31:06,978 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 199 transitions, 1978 flow [2024-06-27 23:31:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:06,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:31:06,978 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:06,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009758, now seen corresponding path program 2 times [2024-06-27 23:31:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:06,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432881101] [2024-06-27 23:31:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:08,083 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 23:31:08,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432881101] [2024-06-27 23:31:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432881101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647275135] [2024-06-27 23:31:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:08,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:08,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 199 transitions, 1978 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:08,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:08,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:08,940 INFO L124 PetriNetUnfolderBase]: 2428/3673 cut-off events. [2024-06-27 23:31:08,941 INFO L125 PetriNetUnfolderBase]: For 115735/115753 co-relation queries the response was YES. [2024-06-27 23:31:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24677 conditions, 3673 events. 2428/3673 cut-off events. For 115735/115753 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17982 event pairs, 733 based on Foata normal form. 8/3670 useless extension candidates. Maximal degree in co-relation 24622. Up to 3320 conditions per place. [2024-06-27 23:31:08,965 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-27 23:31:08,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 230 transitions, 2611 flow [2024-06-27 23:31:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 23:31:08,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 23:31:08,966 INFO L175 Difference]: Start difference. First operand has 131 places, 199 transitions, 1978 flow. Second operand 8 states and 159 transitions. [2024-06-27 23:31:08,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 230 transitions, 2611 flow [2024-06-27 23:31:09,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 230 transitions, 2453 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:09,031 INFO L231 Difference]: Finished difference. Result has 137 places, 207 transitions, 2105 flow [2024-06-27 23:31:09,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=137, PETRI_TRANSITIONS=207} [2024-06-27 23:31:09,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-27 23:31:09,031 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 207 transitions, 2105 flow [2024-06-27 23:31:09,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:09,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:09,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:09,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:31:09,032 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:09,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009975, now seen corresponding path program 1 times [2024-06-27 23:31:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:09,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737281355] [2024-06-27 23:31:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:10,151 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 23:31:10,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:10,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737281355] [2024-06-27 23:31:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737281355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864161148] [2024-06-27 23:31:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:10,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:10,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 207 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:10,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:10,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:10,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:10,985 INFO L124 PetriNetUnfolderBase]: 2621/3885 cut-off events. [2024-06-27 23:31:10,985 INFO L125 PetriNetUnfolderBase]: For 128286/128290 co-relation queries the response was YES. [2024-06-27 23:31:10,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26554 conditions, 3885 events. 2621/3885 cut-off events. For 128286/128290 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18470 event pairs, 762 based on Foata normal form. 7/3888 useless extension candidates. Maximal degree in co-relation 26495. Up to 3690 conditions per place. [2024-06-27 23:31:11,013 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 187 selfloop transitions, 56 changer transitions 0/247 dead transitions. [2024-06-27 23:31:11,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 247 transitions, 3075 flow [2024-06-27 23:31:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:31:11,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 23:31:11,014 INFO L175 Difference]: Start difference. First operand has 137 places, 207 transitions, 2105 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:31:11,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 247 transitions, 3075 flow [2024-06-27 23:31:11,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 247 transitions, 2974 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 23:31:11,095 INFO L231 Difference]: Finished difference. Result has 144 places, 221 transitions, 2351 flow [2024-06-27 23:31:11,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2351, PETRI_PLACES=144, PETRI_TRANSITIONS=221} [2024-06-27 23:31:11,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 23:31:11,096 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 221 transitions, 2351 flow [2024-06-27 23:31:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:11,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:11,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:31:11,096 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1600573948, now seen corresponding path program 3 times [2024-06-27 23:31:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724834689] [2024-06-27 23:31:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:12,270 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 23:31:12,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724834689] [2024-06-27 23:31:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724834689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:12,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:12,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:12,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866121696] [2024-06-27 23:31:12,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:12,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:12,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:12,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:12,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 221 transitions, 2351 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:12,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:12,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:12,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:13,172 INFO L124 PetriNetUnfolderBase]: 2502/3769 cut-off events. [2024-06-27 23:31:13,172 INFO L125 PetriNetUnfolderBase]: For 141165/141185 co-relation queries the response was YES. [2024-06-27 23:31:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27087 conditions, 3769 events. 2502/3769 cut-off events. For 141165/141185 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18372 event pairs, 715 based on Foata normal form. 8/3766 useless extension candidates. Maximal degree in co-relation 27024. Up to 3364 conditions per place. [2024-06-27 23:31:13,199 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 61 changer transitions 0/247 dead transitions. [2024-06-27 23:31:13,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 247 transitions, 2945 flow [2024-06-27 23:31:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:31:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:31:13,202 INFO L175 Difference]: Start difference. First operand has 144 places, 221 transitions, 2351 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:31:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 247 transitions, 2945 flow [2024-06-27 23:31:13,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 247 transitions, 2850 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 23:31:13,297 INFO L231 Difference]: Finished difference. Result has 150 places, 224 transitions, 2465 flow [2024-06-27 23:31:13,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2465, PETRI_PLACES=150, PETRI_TRANSITIONS=224} [2024-06-27 23:31:13,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 23:31:13,298 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 224 transitions, 2465 flow [2024-06-27 23:31:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:13,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:13,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:31:13,298 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:13,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 312282111, now seen corresponding path program 2 times [2024-06-27 23:31:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:13,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436047725] [2024-06-27 23:31:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:13,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:14,470 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 23:31:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436047725] [2024-06-27 23:31:14,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436047725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:14,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:14,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134407269] [2024-06-27 23:31:14,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:14,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:14,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 224 transitions, 2465 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:14,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:14,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:14,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:15,356 INFO L124 PetriNetUnfolderBase]: 2682/3972 cut-off events. [2024-06-27 23:31:15,356 INFO L125 PetriNetUnfolderBase]: For 154928/154932 co-relation queries the response was YES. [2024-06-27 23:31:15,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29181 conditions, 3972 events. 2682/3972 cut-off events. For 154928/154932 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18875 event pairs, 762 based on Foata normal form. 7/3975 useless extension candidates. Maximal degree in co-relation 29115. Up to 3644 conditions per place. [2024-06-27 23:31:15,442 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 73 changer transitions 0/260 dead transitions. [2024-06-27 23:31:15,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 260 transitions, 3523 flow [2024-06-27 23:31:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 23:31:15,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 23:31:15,444 INFO L175 Difference]: Start difference. First operand has 150 places, 224 transitions, 2465 flow. Second operand 9 states and 170 transitions. [2024-06-27 23:31:15,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 260 transitions, 3523 flow [2024-06-27 23:31:15,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 260 transitions, 3340 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:15,529 INFO L231 Difference]: Finished difference. Result has 154 places, 232 transitions, 2604 flow [2024-06-27 23:31:15,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2604, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2024-06-27 23:31:15,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 23:31:15,529 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2604 flow [2024-06-27 23:31:15,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:15,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:15,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:15,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:31:15,530 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:15,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1600581884, now seen corresponding path program 1 times [2024-06-27 23:31:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:15,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333116178] [2024-06-27 23:31:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:15,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:16,996 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 23:31:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333116178] [2024-06-27 23:31:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333116178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:16,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:16,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979124580] [2024-06-27 23:31:16,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:16,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:17,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:17,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2604 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:17,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:17,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:17,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:17,977 INFO L124 PetriNetUnfolderBase]: 2583/3881 cut-off events. [2024-06-27 23:31:17,977 INFO L125 PetriNetUnfolderBase]: For 167025/167027 co-relation queries the response was YES. [2024-06-27 23:31:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29416 conditions, 3881 events. 2583/3881 cut-off events. For 167025/167027 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18958 event pairs, 744 based on Foata normal form. 5/3883 useless extension candidates. Maximal degree in co-relation 29348. Up to 3579 conditions per place. [2024-06-27 23:31:18,009 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 184 selfloop transitions, 49 changer transitions 0/261 dead transitions. [2024-06-27 23:31:18,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 261 transitions, 3402 flow [2024-06-27 23:31:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:31:18,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:31:18,010 INFO L175 Difference]: Start difference. First operand has 154 places, 232 transitions, 2604 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:31:18,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 261 transitions, 3402 flow [2024-06-27 23:31:18,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 261 transitions, 3252 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:18,139 INFO L231 Difference]: Finished difference. Result has 158 places, 236 transitions, 2648 flow [2024-06-27 23:31:18,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2648, PETRI_PLACES=158, PETRI_TRANSITIONS=236} [2024-06-27 23:31:18,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 23:31:18,140 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 236 transitions, 2648 flow [2024-06-27 23:31:18,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:18,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:18,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:31:18,141 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:18,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash 312289551, now seen corresponding path program 3 times [2024-06-27 23:31:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989038357] [2024-06-27 23:31:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:19,309 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 23:31:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989038357] [2024-06-27 23:31:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989038357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:19,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045011517] [2024-06-27 23:31:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:19,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:19,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 236 transitions, 2648 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:19,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:19,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:19,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:20,278 INFO L124 PetriNetUnfolderBase]: 2702/4001 cut-off events. [2024-06-27 23:31:20,278 INFO L125 PetriNetUnfolderBase]: For 176380/176384 co-relation queries the response was YES. [2024-06-27 23:31:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31106 conditions, 4001 events. 2702/4001 cut-off events. For 176380/176384 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19011 event pairs, 741 based on Foata normal form. 7/4004 useless extension candidates. Maximal degree in co-relation 31036. Up to 3675 conditions per place. [2024-06-27 23:31:20,310 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 177 selfloop transitions, 84 changer transitions 0/265 dead transitions. [2024-06-27 23:31:20,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 265 transitions, 3509 flow [2024-06-27 23:31:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 23:31:20,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 23:31:20,312 INFO L175 Difference]: Start difference. First operand has 158 places, 236 transitions, 2648 flow. Second operand 9 states and 168 transitions. [2024-06-27 23:31:20,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 265 transitions, 3509 flow [2024-06-27 23:31:20,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 265 transitions, 3359 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 23:31:20,471 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2757 flow [2024-06-27 23:31:20,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2757, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-27 23:31:20,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-27 23:31:20,471 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2757 flow [2024-06-27 23:31:20,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:20,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:20,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:31:20,472 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:20,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 304738600, now seen corresponding path program 2 times [2024-06-27 23:31:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309170215] [2024-06-27 23:31:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:22,076 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 23:31:22,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:22,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309170215] [2024-06-27 23:31:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309170215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:22,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:22,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:31:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427356140] [2024-06-27 23:31:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:31:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:31:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:31:22,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2757 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:22,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:22,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:23,023 INFO L124 PetriNetUnfolderBase]: 2611/3923 cut-off events. [2024-06-27 23:31:23,024 INFO L125 PetriNetUnfolderBase]: For 187562/187566 co-relation queries the response was YES. [2024-06-27 23:31:23,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30888 conditions, 3923 events. 2611/3923 cut-off events. For 187562/187566 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19180 event pairs, 747 based on Foata normal form. 7/3926 useless extension candidates. Maximal degree in co-relation 30817. Up to 3444 conditions per place. [2024-06-27 23:31:23,056 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 155 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-27 23:31:23,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 274 transitions, 3753 flow [2024-06-27 23:31:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:31:23,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 23:31:23,057 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2757 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:31:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 274 transitions, 3753 flow [2024-06-27 23:31:23,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 274 transitions, 3568 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:23,166 INFO L231 Difference]: Finished difference. Result has 165 places, 248 transitions, 2945 flow [2024-06-27 23:31:23,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2945, PETRI_PLACES=165, PETRI_TRANSITIONS=248} [2024-06-27 23:31:23,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-27 23:31:23,167 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 248 transitions, 2945 flow [2024-06-27 23:31:23,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:23,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:23,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:31:23,167 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:23,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 341280222, now seen corresponding path program 3 times [2024-06-27 23:31:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564519638] [2024-06-27 23:31:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:24,619 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 23:31:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564519638] [2024-06-27 23:31:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564519638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986229539] [2024-06-27 23:31:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:24,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:24,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 248 transitions, 2945 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:24,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:24,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:24,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:25,589 INFO L124 PetriNetUnfolderBase]: 2629/3948 cut-off events. [2024-06-27 23:31:25,590 INFO L125 PetriNetUnfolderBase]: For 200059/200063 co-relation queries the response was YES. [2024-06-27 23:31:25,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 3948 events. 2629/3948 cut-off events. For 200059/200063 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19309 event pairs, 747 based on Foata normal form. 7/3952 useless extension candidates. Maximal degree in co-relation 31860. Up to 3534 conditions per place. [2024-06-27 23:31:25,621 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 168 selfloop transitions, 79 changer transitions 0/276 dead transitions. [2024-06-27 23:31:25,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 276 transitions, 3743 flow [2024-06-27 23:31:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:31:25,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:31:25,622 INFO L175 Difference]: Start difference. First operand has 165 places, 248 transitions, 2945 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:31:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 276 transitions, 3743 flow [2024-06-27 23:31:25,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 276 transitions, 3512 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 23:31:25,727 INFO L231 Difference]: Finished difference. Result has 168 places, 252 transitions, 2985 flow [2024-06-27 23:31:25,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2985, PETRI_PLACES=168, PETRI_TRANSITIONS=252} [2024-06-27 23:31:25,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 23:31:25,728 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 252 transitions, 2985 flow [2024-06-27 23:31:25,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:25,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:25,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:25,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:31:25,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:25,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 304411891, now seen corresponding path program 4 times [2024-06-27 23:31:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:25,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434712085] [2024-06-27 23:31:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:27,013 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 23:31:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434712085] [2024-06-27 23:31:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434712085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:27,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878884157] [2024-06-27 23:31:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:27,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:27,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 252 transitions, 2985 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:27,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:27,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:27,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:27,921 INFO L124 PetriNetUnfolderBase]: 2772/4103 cut-off events. [2024-06-27 23:31:27,921 INFO L125 PetriNetUnfolderBase]: For 212319/212327 co-relation queries the response was YES. [2024-06-27 23:31:27,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33614 conditions, 4103 events. 2772/4103 cut-off events. For 212319/212327 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19645 event pairs, 748 based on Foata normal form. 11/4110 useless extension candidates. Maximal degree in co-relation 33540. Up to 3521 conditions per place. [2024-06-27 23:31:27,958 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 158 selfloop transitions, 128 changer transitions 0/290 dead transitions. [2024-06-27 23:31:27,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 290 transitions, 4171 flow [2024-06-27 23:31:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:31:27,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:31:27,960 INFO L175 Difference]: Start difference. First operand has 168 places, 252 transitions, 2985 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:31:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 290 transitions, 4171 flow [2024-06-27 23:31:28,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 290 transitions, 3960 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:28,143 INFO L231 Difference]: Finished difference. Result has 171 places, 264 transitions, 3396 flow [2024-06-27 23:31:28,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3396, PETRI_PLACES=171, PETRI_TRANSITIONS=264} [2024-06-27 23:31:28,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 23:31:28,144 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 264 transitions, 3396 flow [2024-06-27 23:31:28,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:28,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:28,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:28,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:31:28,145 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:28,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 295207681, now seen corresponding path program 5 times [2024-06-27 23:31:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226136276] [2024-06-27 23:31:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:29,392 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 23:31:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226136276] [2024-06-27 23:31:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226136276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:29,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:29,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735658083] [2024-06-27 23:31:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:29,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:29,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:29,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 264 transitions, 3396 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:29,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:29,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:29,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:30,312 INFO L124 PetriNetUnfolderBase]: 2830/4185 cut-off events. [2024-06-27 23:31:30,312 INFO L125 PetriNetUnfolderBase]: For 231638/231646 co-relation queries the response was YES. [2024-06-27 23:31:30,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4185 events. 2830/4185 cut-off events. For 231638/231646 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20066 event pairs, 750 based on Foata normal form. 11/4192 useless extension candidates. Maximal degree in co-relation 35746. Up to 3578 conditions per place. [2024-06-27 23:31:30,350 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 189 selfloop transitions, 111 changer transitions 0/304 dead transitions. [2024-06-27 23:31:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 304 transitions, 4786 flow [2024-06-27 23:31:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 23:31:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:31:30,351 INFO L175 Difference]: Start difference. First operand has 171 places, 264 transitions, 3396 flow. Second operand 9 states and 171 transitions. [2024-06-27 23:31:30,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 304 transitions, 4786 flow [2024-06-27 23:31:30,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 304 transitions, 4623 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 23:31:30,520 INFO L231 Difference]: Finished difference. Result has 178 places, 275 transitions, 3733 flow [2024-06-27 23:31:30,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3733, PETRI_PLACES=178, PETRI_TRANSITIONS=275} [2024-06-27 23:31:30,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 23:31:30,521 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 275 transitions, 3733 flow [2024-06-27 23:31:30,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:30,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:30,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:30,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:31:30,521 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:30,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:30,521 INFO L85 PathProgramCache]: Analyzing trace with hash 295207464, now seen corresponding path program 4 times [2024-06-27 23:31:30,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:30,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758496771] [2024-06-27 23:31:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:30,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:31,785 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 23:31:31,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:31,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758496771] [2024-06-27 23:31:31,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758496771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:31,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:31,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:31,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990333468] [2024-06-27 23:31:31,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:31,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:31,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 275 transitions, 3733 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:32,802 INFO L124 PetriNetUnfolderBase]: 2711/4074 cut-off events. [2024-06-27 23:31:32,802 INFO L125 PetriNetUnfolderBase]: For 239882/239896 co-relation queries the response was YES. [2024-06-27 23:31:32,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35278 conditions, 4074 events. 2711/4074 cut-off events. For 239882/239896 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19931 event pairs, 751 based on Foata normal form. 16/4085 useless extension candidates. Maximal degree in co-relation 35199. Up to 3514 conditions per place. [2024-06-27 23:31:32,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 81 changer transitions 0/305 dead transitions. [2024-06-27 23:31:32,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 305 transitions, 4659 flow [2024-06-27 23:31:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:31:32,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:31:32,841 INFO L175 Difference]: Start difference. First operand has 178 places, 275 transitions, 3733 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:31:32,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 305 transitions, 4659 flow [2024-06-27 23:31:32,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 305 transitions, 4393 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 23:31:32,993 INFO L231 Difference]: Finished difference. Result has 181 places, 281 transitions, 3819 flow [2024-06-27 23:31:32,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=181, PETRI_TRANSITIONS=281} [2024-06-27 23:31:32,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 23:31:32,994 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 281 transitions, 3819 flow [2024-06-27 23:31:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:32,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:31:32,994 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:32,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 332083452, now seen corresponding path program 4 times [2024-06-27 23:31:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:32,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242239392] [2024-06-27 23:31:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:34,399 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 23:31:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242239392] [2024-06-27 23:31:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242239392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:34,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300229565] [2024-06-27 23:31:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:34,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:34,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 281 transitions, 3819 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:34,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:34,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:34,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:35,367 INFO L124 PetriNetUnfolderBase]: 2742/4109 cut-off events. [2024-06-27 23:31:35,367 INFO L125 PetriNetUnfolderBase]: For 251673/251677 co-relation queries the response was YES. [2024-06-27 23:31:35,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35466 conditions, 4109 events. 2742/4109 cut-off events. For 251673/251677 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20116 event pairs, 793 based on Foata normal form. 7/4113 useless extension candidates. Maximal degree in co-relation 35386. Up to 3660 conditions per place. [2024-06-27 23:31:35,406 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 207 selfloop transitions, 68 changer transitions 0/310 dead transitions. [2024-06-27 23:31:35,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 310 transitions, 4749 flow [2024-06-27 23:31:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:31:35,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 23:31:35,407 INFO L175 Difference]: Start difference. First operand has 181 places, 281 transitions, 3819 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:31:35,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 310 transitions, 4749 flow [2024-06-27 23:31:35,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 310 transitions, 4621 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:35,613 INFO L231 Difference]: Finished difference. Result has 185 places, 285 transitions, 3926 flow [2024-06-27 23:31:35,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=185, PETRI_TRANSITIONS=285} [2024-06-27 23:31:35,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 23:31:35,613 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 285 transitions, 3926 flow [2024-06-27 23:31:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:35,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:35,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:35,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:31:35,614 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:35,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 332083173, now seen corresponding path program 6 times [2024-06-27 23:31:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407121534] [2024-06-27 23:31:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407121534] [2024-06-27 23:31:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407121534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:36,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723639852] [2024-06-27 23:31:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:36,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:36,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 285 transitions, 3926 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:36,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:36,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:36,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:37,827 INFO L124 PetriNetUnfolderBase]: 2853/4219 cut-off events. [2024-06-27 23:31:37,827 INFO L125 PetriNetUnfolderBase]: For 262884/262888 co-relation queries the response was YES. [2024-06-27 23:31:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 4219 events. 2853/4219 cut-off events. For 262884/262888 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20240 event pairs, 794 based on Foata normal form. 7/4222 useless extension candidates. Maximal degree in co-relation 36783. Up to 3616 conditions per place. [2024-06-27 23:31:37,867 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 196 selfloop transitions, 112 changer transitions 0/312 dead transitions. [2024-06-27 23:31:37,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 312 transitions, 4973 flow [2024-06-27 23:31:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:31:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:31:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 23:31:37,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 23:31:37,868 INFO L175 Difference]: Start difference. First operand has 185 places, 285 transitions, 3926 flow. Second operand 8 states and 161 transitions. [2024-06-27 23:31:37,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 312 transitions, 4973 flow [2024-06-27 23:31:38,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 312 transitions, 4776 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:38,109 INFO L231 Difference]: Finished difference. Result has 187 places, 286 transitions, 4017 flow [2024-06-27 23:31:38,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=187, PETRI_TRANSITIONS=286} [2024-06-27 23:31:38,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-27 23:31:38,110 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 286 transitions, 4017 flow [2024-06-27 23:31:38,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:38,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:38,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:38,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:31:38,111 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:38,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash -203073212, now seen corresponding path program 5 times [2024-06-27 23:31:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691141715] [2024-06-27 23:31:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:38,997 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 23:31:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691141715] [2024-06-27 23:31:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691141715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:38,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:38,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938015895] [2024-06-27 23:31:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 286 transitions, 4017 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:39,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:39,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:39,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:40,158 INFO L124 PetriNetUnfolderBase]: 2777/4170 cut-off events. [2024-06-27 23:31:40,158 INFO L125 PetriNetUnfolderBase]: For 274541/274551 co-relation queries the response was YES. [2024-06-27 23:31:40,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36929 conditions, 4170 events. 2777/4170 cut-off events. For 274541/274551 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20502 event pairs, 735 based on Foata normal form. 12/4180 useless extension candidates. Maximal degree in co-relation 36846. Up to 3772 conditions per place. [2024-06-27 23:31:40,199 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 235 selfloop transitions, 61 changer transitions 0/336 dead transitions. [2024-06-27 23:31:40,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 336 transitions, 4933 flow [2024-06-27 23:31:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:31:40,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:31:40,204 INFO L175 Difference]: Start difference. First operand has 187 places, 286 transitions, 4017 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:31:40,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 336 transitions, 4933 flow [2024-06-27 23:31:40,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 336 transitions, 4669 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 23:31:40,426 INFO L231 Difference]: Finished difference. Result has 192 places, 305 transitions, 4143 flow [2024-06-27 23:31:40,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4143, PETRI_PLACES=192, PETRI_TRANSITIONS=305} [2024-06-27 23:31:40,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 23:31:40,427 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 305 transitions, 4143 flow [2024-06-27 23:31:40,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:40,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:40,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:40,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:31:40,428 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:40,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1511951714, now seen corresponding path program 6 times [2024-06-27 23:31:40,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:40,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73199269] [2024-06-27 23:31:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:41,329 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 23:31:41,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73199269] [2024-06-27 23:31:41,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73199269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:41,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:41,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881806556] [2024-06-27 23:31:41,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:41,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:41,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 305 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:41,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:41,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:41,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:42,317 INFO L124 PetriNetUnfolderBase]: 2846/4279 cut-off events. [2024-06-27 23:31:42,317 INFO L125 PetriNetUnfolderBase]: For 290357/290369 co-relation queries the response was YES. [2024-06-27 23:31:42,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 4279 events. 2846/4279 cut-off events. For 290357/290369 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21184 event pairs, 739 based on Foata normal form. 16/4293 useless extension candidates. Maximal degree in co-relation 37701. Up to 3797 conditions per place. [2024-06-27 23:31:42,359 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 241 selfloop transitions, 81 changer transitions 0/362 dead transitions. [2024-06-27 23:31:42,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 362 transitions, 5313 flow [2024-06-27 23:31:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 23:31:42,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 23:31:42,360 INFO L175 Difference]: Start difference. First operand has 192 places, 305 transitions, 4143 flow. Second operand 9 states and 178 transitions. [2024-06-27 23:31:42,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 362 transitions, 5313 flow [2024-06-27 23:31:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 362 transitions, 5073 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:42,656 INFO L231 Difference]: Finished difference. Result has 198 places, 329 transitions, 4558 flow [2024-06-27 23:31:42,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4558, PETRI_PLACES=198, PETRI_TRANSITIONS=329} [2024-06-27 23:31:42,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 23:31:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 329 transitions, 4558 flow [2024-06-27 23:31:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:42,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:31:42,657 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2103164092, now seen corresponding path program 7 times [2024-06-27 23:31:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837476725] [2024-06-27 23:31:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:43,639 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 23:31:43,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:43,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837476725] [2024-06-27 23:31:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837476725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:43,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940104050] [2024-06-27 23:31:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:43,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:43,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:43,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 329 transitions, 4558 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:43,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:43,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:43,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:44,676 INFO L124 PetriNetUnfolderBase]: 2863/4301 cut-off events. [2024-06-27 23:31:44,677 INFO L125 PetriNetUnfolderBase]: For 303071/303079 co-relation queries the response was YES. [2024-06-27 23:31:44,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38693 conditions, 4301 events. 2863/4301 cut-off events. For 303071/303079 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21296 event pairs, 742 based on Foata normal form. 10/4308 useless extension candidates. Maximal degree in co-relation 38606. Up to 3841 conditions per place. [2024-06-27 23:31:44,718 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 242 selfloop transitions, 84 changer transitions 0/366 dead transitions. [2024-06-27 23:31:44,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 5453 flow [2024-06-27 23:31:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:31:44,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:31:44,720 INFO L175 Difference]: Start difference. First operand has 198 places, 329 transitions, 4558 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:31:44,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 5453 flow [2024-06-27 23:31:45,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 366 transitions, 5173 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 23:31:45,009 INFO L231 Difference]: Finished difference. Result has 200 places, 335 transitions, 4597 flow [2024-06-27 23:31:45,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=200, PETRI_TRANSITIONS=335} [2024-06-27 23:31:45,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 23:31:45,009 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 335 transitions, 4597 flow [2024-06-27 23:31:45,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:45,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:45,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:31:45,010 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:45,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2103175469, now seen corresponding path program 7 times [2024-06-27 23:31:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627001016] [2024-06-27 23:31:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:45,991 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 23:31:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627001016] [2024-06-27 23:31:45,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627001016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:45,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:45,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:45,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410326506] [2024-06-27 23:31:45,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:46,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:46,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 335 transitions, 4597 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:46,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:46,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:46,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:47,072 INFO L124 PetriNetUnfolderBase]: 3076/4550 cut-off events. [2024-06-27 23:31:47,073 INFO L125 PetriNetUnfolderBase]: For 321097/321099 co-relation queries the response was YES. [2024-06-27 23:31:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40942 conditions, 4550 events. 3076/4550 cut-off events. For 321097/321099 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22135 event pairs, 804 based on Foata normal form. 5/4553 useless extension candidates. Maximal degree in co-relation 40856. Up to 4323 conditions per place. [2024-06-27 23:31:47,116 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 313 selfloop transitions, 74 changer transitions 0/391 dead transitions. [2024-06-27 23:31:47,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 6226 flow [2024-06-27 23:31:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:31:47,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:31:47,117 INFO L175 Difference]: Start difference. First operand has 200 places, 335 transitions, 4597 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:31:47,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 6226 flow [2024-06-27 23:31:47,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 391 transitions, 6011 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 23:31:47,427 INFO L231 Difference]: Finished difference. Result has 204 places, 357 transitions, 5009 flow [2024-06-27 23:31:47,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5009, PETRI_PLACES=204, PETRI_TRANSITIONS=357} [2024-06-27 23:31:47,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-27 23:31:47,428 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 357 transitions, 5009 flow [2024-06-27 23:31:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:47,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:47,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:31:47,428 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash 406119454, now seen corresponding path program 8 times [2024-06-27 23:31:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324181334] [2024-06-27 23:31:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:48,393 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 23:31:48,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:48,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324181334] [2024-06-27 23:31:48,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324181334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:48,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:48,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:48,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788052456] [2024-06-27 23:31:48,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:48,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:48,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:48,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 357 transitions, 5009 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:48,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:48,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:48,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:49,576 INFO L124 PetriNetUnfolderBase]: 2999/4496 cut-off events. [2024-06-27 23:31:49,577 INFO L125 PetriNetUnfolderBase]: For 333670/333686 co-relation queries the response was YES. [2024-06-27 23:31:49,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41008 conditions, 4496 events. 2999/4496 cut-off events. For 333670/333686 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22350 event pairs, 736 based on Foata normal form. 18/4512 useless extension candidates. Maximal degree in co-relation 40920. Up to 4044 conditions per place. [2024-06-27 23:31:49,621 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 285 selfloop transitions, 77 changer transitions 0/408 dead transitions. [2024-06-27 23:31:49,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 408 transitions, 6156 flow [2024-06-27 23:31:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:31:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:31:49,622 INFO L175 Difference]: Start difference. First operand has 204 places, 357 transitions, 5009 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:31:49,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 408 transitions, 6156 flow [2024-06-27 23:31:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 408 transitions, 5956 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 23:31:49,991 INFO L231 Difference]: Finished difference. Result has 210 places, 379 transitions, 5345 flow [2024-06-27 23:31:49,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5345, PETRI_PLACES=210, PETRI_TRANSITIONS=379} [2024-06-27 23:31:49,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-27 23:31:49,992 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 379 transitions, 5345 flow [2024-06-27 23:31:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:49,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:49,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:31:49,993 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:49,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:49,993 INFO L85 PathProgramCache]: Analyzing trace with hash 688687864, now seen corresponding path program 9 times [2024-06-27 23:31:49,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:49,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103047450] [2024-06-27 23:31:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:51,043 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 23:31:51,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:51,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103047450] [2024-06-27 23:31:51,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103047450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:51,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:51,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007518422] [2024-06-27 23:31:51,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:51,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:51,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:51,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:51,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:51,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:51,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 379 transitions, 5345 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:51,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:51,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:51,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:52,318 INFO L124 PetriNetUnfolderBase]: 3024/4531 cut-off events. [2024-06-27 23:31:52,318 INFO L125 PetriNetUnfolderBase]: For 348193/348209 co-relation queries the response was YES. [2024-06-27 23:31:52,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41610 conditions, 4531 events. 3024/4531 cut-off events. For 348193/348209 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22523 event pairs, 738 based on Foata normal form. 18/4547 useless extension candidates. Maximal degree in co-relation 41520. Up to 4042 conditions per place. [2024-06-27 23:31:52,359 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 279 selfloop transitions, 92 changer transitions 0/417 dead transitions. [2024-06-27 23:31:52,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 417 transitions, 6360 flow [2024-06-27 23:31:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:31:52,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 23:31:52,370 INFO L175 Difference]: Start difference. First operand has 210 places, 379 transitions, 5345 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:31:52,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 417 transitions, 6360 flow [2024-06-27 23:31:52,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 417 transitions, 6212 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 23:31:52,700 INFO L231 Difference]: Finished difference. Result has 216 places, 388 transitions, 5581 flow [2024-06-27 23:31:52,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5581, PETRI_PLACES=216, PETRI_TRANSITIONS=388} [2024-06-27 23:31:52,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-27 23:31:52,701 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 388 transitions, 5581 flow [2024-06-27 23:31:52,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:52,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:52,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:31:52,701 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash 406269401, now seen corresponding path program 8 times [2024-06-27 23:31:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:52,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581547554] [2024-06-27 23:31:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:53,719 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 23:31:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581547554] [2024-06-27 23:31:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581547554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:53,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:53,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448086286] [2024-06-27 23:31:53,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:53,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:53,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:53,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:53,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 388 transitions, 5581 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:53,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:53,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:53,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:54,917 INFO L124 PetriNetUnfolderBase]: 3264/4815 cut-off events. [2024-06-27 23:31:54,917 INFO L125 PetriNetUnfolderBase]: For 372769/372773 co-relation queries the response was YES. [2024-06-27 23:31:54,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44531 conditions, 4815 events. 3264/4815 cut-off events. For 372769/372773 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 23618 event pairs, 803 based on Foata normal form. 7/4820 useless extension candidates. Maximal degree in co-relation 44440. Up to 4570 conditions per place. [2024-06-27 23:31:54,967 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 86 changer transitions 0/450 dead transitions. [2024-06-27 23:31:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 450 transitions, 7489 flow [2024-06-27 23:31:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:31:54,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:31:54,970 INFO L175 Difference]: Start difference. First operand has 216 places, 388 transitions, 5581 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:31:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 450 transitions, 7489 flow [2024-06-27 23:31:55,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 450 transitions, 7223 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 23:31:55,339 INFO L231 Difference]: Finished difference. Result has 219 places, 418 transitions, 6140 flow [2024-06-27 23:31:55,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6140, PETRI_PLACES=219, PETRI_TRANSITIONS=418} [2024-06-27 23:31:55,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-27 23:31:55,339 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 418 transitions, 6140 flow [2024-06-27 23:31:55,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:55,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:55,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:31:55,340 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:55,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash 411833591, now seen corresponding path program 9 times [2024-06-27 23:31:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255011123] [2024-06-27 23:31:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:31:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255011123] [2024-06-27 23:31:56,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255011123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:56,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:56,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001138752] [2024-06-27 23:31:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:56,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:56,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:31:56,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 418 transitions, 6140 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:56,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:56,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:31:56,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:31:57,642 INFO L124 PetriNetUnfolderBase]: 3326/4903 cut-off events. [2024-06-27 23:31:57,642 INFO L125 PetriNetUnfolderBase]: For 391459/391463 co-relation queries the response was YES. [2024-06-27 23:31:57,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45756 conditions, 4903 events. 3326/4903 cut-off events. For 391459/391463 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24086 event pairs, 806 based on Foata normal form. 7/4908 useless extension candidates. Maximal degree in co-relation 45663. Up to 4448 conditions per place. [2024-06-27 23:31:57,692 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 336 selfloop transitions, 127 changer transitions 0/467 dead transitions. [2024-06-27 23:31:57,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 467 transitions, 7892 flow [2024-06-27 23:31:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:31:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:31:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:31:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 23:31:57,694 INFO L175 Difference]: Start difference. First operand has 219 places, 418 transitions, 6140 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:31:57,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 467 transitions, 7892 flow [2024-06-27 23:31:58,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 467 transitions, 7728 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 23:31:58,271 INFO L231 Difference]: Finished difference. Result has 226 places, 433 transitions, 6552 flow [2024-06-27 23:31:58,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6552, PETRI_PLACES=226, PETRI_TRANSITIONS=433} [2024-06-27 23:31:58,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 23:31:58,271 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 433 transitions, 6552 flow [2024-06-27 23:31:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:31:58,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:31:58,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:31:58,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:31:58,272 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:31:58,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:31:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash 411833374, now seen corresponding path program 10 times [2024-06-27 23:31:58,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:31:58,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794271259] [2024-06-27 23:31:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:31:58,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:31:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:31:59,363 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 23:31:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:31:59,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794271259] [2024-06-27 23:31:59,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794271259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:31:59,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:31:59,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:31:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562031530] [2024-06-27 23:31:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:31:59,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:31:59,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:31:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:31:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:31:59,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:31:59,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 433 transitions, 6552 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:31:59,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:31:59,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:31:59,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:00,534 INFO L124 PetriNetUnfolderBase]: 3198/4779 cut-off events. [2024-06-27 23:32:00,534 INFO L125 PetriNetUnfolderBase]: For 405270/405280 co-relation queries the response was YES. [2024-06-27 23:32:00,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45340 conditions, 4779 events. 3198/4779 cut-off events. For 405270/405280 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23960 event pairs, 750 based on Foata normal form. 12/4789 useless extension candidates. Maximal degree in co-relation 45245. Up to 4136 conditions per place. [2024-06-27 23:32:00,583 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 277 selfloop transitions, 130 changer transitions 0/465 dead transitions. [2024-06-27 23:32:00,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 465 transitions, 7495 flow [2024-06-27 23:32:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:32:00,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:32:00,586 INFO L175 Difference]: Start difference. First operand has 226 places, 433 transitions, 6552 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:32:00,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 465 transitions, 7495 flow [2024-06-27 23:32:01,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 465 transitions, 6931 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-06-27 23:32:01,276 INFO L231 Difference]: Finished difference. Result has 226 places, 436 transitions, 6284 flow [2024-06-27 23:32:01,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6284, PETRI_PLACES=226, PETRI_TRANSITIONS=436} [2024-06-27 23:32:01,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 23:32:01,277 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 436 transitions, 6284 flow [2024-06-27 23:32:01,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:01,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:01,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:01,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:32:01,277 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:01,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 411841031, now seen corresponding path program 10 times [2024-06-27 23:32:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782813740] [2024-06-27 23:32:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:01,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:02,375 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 23:32:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782813740] [2024-06-27 23:32:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782813740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:02,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:02,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:32:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135313500] [2024-06-27 23:32:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:02,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:32:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:32:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:32:02,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:02,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 436 transitions, 6284 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:32:02,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:02,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:02,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:03,578 INFO L124 PetriNetUnfolderBase]: 3322/4898 cut-off events. [2024-06-27 23:32:03,579 INFO L125 PetriNetUnfolderBase]: For 412991/412995 co-relation queries the response was YES. [2024-06-27 23:32:03,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45740 conditions, 4898 events. 3322/4898 cut-off events. For 412991/412995 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24042 event pairs, 806 based on Foata normal form. 7/4903 useless extension candidates. Maximal degree in co-relation 45646. Up to 4447 conditions per place. [2024-06-27 23:32:03,625 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 318 selfloop transitions, 146 changer transitions 0/468 dead transitions. [2024-06-27 23:32:03,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 468 transitions, 7612 flow [2024-06-27 23:32:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 23:32:03,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 23:32:03,626 INFO L175 Difference]: Start difference. First operand has 226 places, 436 transitions, 6284 flow. Second operand 9 states and 175 transitions. [2024-06-27 23:32:03,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 468 transitions, 7612 flow [2024-06-27 23:32:04,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 468 transitions, 7136 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:04,064 INFO L231 Difference]: Finished difference. Result has 227 places, 437 transitions, 6124 flow [2024-06-27 23:32:04,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=227, PETRI_TRANSITIONS=437} [2024-06-27 23:32:04,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-27 23:32:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 437 transitions, 6124 flow [2024-06-27 23:32:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 23:32:04,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:04,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:04,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:32:04,065 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:04,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1369346586, now seen corresponding path program 5 times [2024-06-27 23:32:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:04,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008693884] [2024-06-27 23:32:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:04,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:05,348 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 23:32:05,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008693884] [2024-06-27 23:32:05,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008693884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:32:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859971392] [2024-06-27 23:32:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:32:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:32:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:32:05,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:32:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 437 transitions, 6124 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:32:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:06,545 INFO L124 PetriNetUnfolderBase]: 3192/4758 cut-off events. [2024-06-27 23:32:06,545 INFO L125 PetriNetUnfolderBase]: For 425637/425675 co-relation queries the response was YES. [2024-06-27 23:32:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44579 conditions, 4758 events. 3192/4758 cut-off events. For 425637/425675 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23873 event pairs, 836 based on Foata normal form. 30/4772 useless extension candidates. Maximal degree in co-relation 44484. Up to 4311 conditions per place. [2024-06-27 23:32:06,595 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 54 changer transitions 0/472 dead transitions. [2024-06-27 23:32:06,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 472 transitions, 7384 flow [2024-06-27 23:32:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:32:06,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:32:06,596 INFO L175 Difference]: Start difference. First operand has 227 places, 437 transitions, 6124 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:32:06,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 472 transitions, 7384 flow [2024-06-27 23:32:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 472 transitions, 6991 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:07,152 INFO L231 Difference]: Finished difference. Result has 229 places, 441 transitions, 5885 flow [2024-06-27 23:32:07,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5885, PETRI_PLACES=229, PETRI_TRANSITIONS=441} [2024-06-27 23:32:07,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-27 23:32:07,153 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 441 transitions, 5885 flow [2024-06-27 23:32:07,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:07,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:07,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:07,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:32:07,153 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:07,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -597578827, now seen corresponding path program 1 times [2024-06-27 23:32:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372864891] [2024-06-27 23:32:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:08,330 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 23:32:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:08,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372864891] [2024-06-27 23:32:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372864891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:32:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274747253] [2024-06-27 23:32:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:08,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:32:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:32:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:32:08,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:32:08,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 441 transitions, 5885 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:08,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:08,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:32:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:09,392 INFO L124 PetriNetUnfolderBase]: 2907/4463 cut-off events. [2024-06-27 23:32:09,392 INFO L125 PetriNetUnfolderBase]: For 382140/382195 co-relation queries the response was YES. [2024-06-27 23:32:09,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40538 conditions, 4463 events. 2907/4463 cut-off events. For 382140/382195 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23181 event pairs, 798 based on Foata normal form. 35/4475 useless extension candidates. Maximal degree in co-relation 40442. Up to 4008 conditions per place. [2024-06-27 23:32:09,436 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 386 selfloop transitions, 13 changer transitions 0/453 dead transitions. [2024-06-27 23:32:09,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 453 transitions, 6743 flow [2024-06-27 23:32:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:32:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:32:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 23:32:09,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:32:09,439 INFO L175 Difference]: Start difference. First operand has 229 places, 441 transitions, 5885 flow. Second operand 6 states and 114 transitions. [2024-06-27 23:32:09,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 453 transitions, 6743 flow [2024-06-27 23:32:09,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 453 transitions, 6599 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:09,894 INFO L231 Difference]: Finished difference. Result has 228 places, 444 transitions, 5813 flow [2024-06-27 23:32:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5813, PETRI_PLACES=228, PETRI_TRANSITIONS=444} [2024-06-27 23:32:09,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-27 23:32:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 444 transitions, 5813 flow [2024-06-27 23:32:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:09,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:32:09,895 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:09,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 913673362, now seen corresponding path program 1 times [2024-06-27 23:32:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896963468] [2024-06-27 23:32:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:11,224 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 23:32:11,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896963468] [2024-06-27 23:32:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896963468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:11,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:11,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:11,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093650841] [2024-06-27 23:32:11,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:11,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:11,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:11,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:32:11,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 444 transitions, 5813 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:32:11,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:12,541 INFO L124 PetriNetUnfolderBase]: 3198/4783 cut-off events. [2024-06-27 23:32:12,541 INFO L125 PetriNetUnfolderBase]: For 445794/445800 co-relation queries the response was YES. [2024-06-27 23:32:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45097 conditions, 4783 events. 3198/4783 cut-off events. For 445794/445800 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24011 event pairs, 751 based on Foata normal form. 5/4782 useless extension candidates. Maximal degree in co-relation 44999. Up to 4184 conditions per place. [2024-06-27 23:32:12,586 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 328 selfloop transitions, 87 changer transitions 0/474 dead transitions. [2024-06-27 23:32:12,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 474 transitions, 6834 flow [2024-06-27 23:32:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:32:12,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:32:12,587 INFO L175 Difference]: Start difference. First operand has 228 places, 444 transitions, 5813 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:32:12,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 474 transitions, 6834 flow [2024-06-27 23:32:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 474 transitions, 6786 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:32:13,253 INFO L231 Difference]: Finished difference. Result has 232 places, 447 transitions, 6050 flow [2024-06-27 23:32:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6050, PETRI_PLACES=232, PETRI_TRANSITIONS=447} [2024-06-27 23:32:13,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-27 23:32:13,254 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 447 transitions, 6050 flow [2024-06-27 23:32:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:13,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:32:13,255 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2098945738, now seen corresponding path program 1 times [2024-06-27 23:32:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712699850] [2024-06-27 23:32:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:14,455 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 23:32:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:14,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712699850] [2024-06-27 23:32:14,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712699850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:14,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:14,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:14,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275324599] [2024-06-27 23:32:14,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:14,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:14,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:14,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:14,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 447 transitions, 6050 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:14,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:14,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:14,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:15,886 INFO L124 PetriNetUnfolderBase]: 3374/4981 cut-off events. [2024-06-27 23:32:15,887 INFO L125 PetriNetUnfolderBase]: For 467576/467584 co-relation queries the response was YES. [2024-06-27 23:32:15,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47613 conditions, 4981 events. 3374/4981 cut-off events. For 467576/467584 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24714 event pairs, 730 based on Foata normal form. 11/4987 useless extension candidates. Maximal degree in co-relation 47514. Up to 4643 conditions per place. [2024-06-27 23:32:15,940 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 399 selfloop transitions, 90 changer transitions 0/493 dead transitions. [2024-06-27 23:32:15,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 493 transitions, 7927 flow [2024-06-27 23:32:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:32:15,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:32:15,941 INFO L175 Difference]: Start difference. First operand has 232 places, 447 transitions, 6050 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:32:15,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 493 transitions, 7927 flow [2024-06-27 23:32:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 493 transitions, 7672 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:16,448 INFO L231 Difference]: Finished difference. Result has 235 places, 461 transitions, 6300 flow [2024-06-27 23:32:16,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6300, PETRI_PLACES=235, PETRI_TRANSITIONS=461} [2024-06-27 23:32:16,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-27 23:32:16,449 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 461 transitions, 6300 flow [2024-06-27 23:32:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:16,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:16,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:16,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:32:16,449 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:16,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash 918321688, now seen corresponding path program 2 times [2024-06-27 23:32:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:16,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583514742] [2024-06-27 23:32:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:17,697 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 23:32:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583514742] [2024-06-27 23:32:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583514742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653404361] [2024-06-27 23:32:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:17,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:17,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 461 transitions, 6300 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:17,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:17,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:17,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:18,980 INFO L124 PetriNetUnfolderBase]: 3432/5062 cut-off events. [2024-06-27 23:32:18,981 INFO L125 PetriNetUnfolderBase]: For 496003/496011 co-relation queries the response was YES. [2024-06-27 23:32:19,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49641 conditions, 5062 events. 3432/5062 cut-off events. For 496003/496011 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25121 event pairs, 723 based on Foata normal form. 11/5068 useless extension candidates. Maximal degree in co-relation 49540. Up to 4543 conditions per place. [2024-06-27 23:32:19,036 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 376 selfloop transitions, 126 changer transitions 0/506 dead transitions. [2024-06-27 23:32:19,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 506 transitions, 8343 flow [2024-06-27 23:32:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:32:19,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 23:32:19,037 INFO L175 Difference]: Start difference. First operand has 235 places, 461 transitions, 6300 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:32:19,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 506 transitions, 8343 flow [2024-06-27 23:32:19,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 506 transitions, 8155 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 23:32:19,535 INFO L231 Difference]: Finished difference. Result has 241 places, 473 transitions, 6742 flow [2024-06-27 23:32:19,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6742, PETRI_PLACES=241, PETRI_TRANSITIONS=473} [2024-06-27 23:32:19,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-27 23:32:19,535 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 473 transitions, 6742 flow [2024-06-27 23:32:19,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:19,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:19,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:19,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:32:19,536 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:19,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash 918321936, now seen corresponding path program 1 times [2024-06-27 23:32:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479639086] [2024-06-27 23:32:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:21,099 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 23:32:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479639086] [2024-06-27 23:32:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479639086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:21,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:21,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:32:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726702921] [2024-06-27 23:32:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:32:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:32:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:32:21,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:21,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 473 transitions, 6742 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:21,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:21,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:21,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:22,461 INFO L124 PetriNetUnfolderBase]: 3450/5086 cut-off events. [2024-06-27 23:32:22,461 INFO L125 PetriNetUnfolderBase]: For 519974/519978 co-relation queries the response was YES. [2024-06-27 23:32:22,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51163 conditions, 5086 events. 3450/5086 cut-off events. For 519974/519978 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25287 event pairs, 711 based on Foata normal form. 7/5089 useless extension candidates. Maximal degree in co-relation 51059. Up to 4811 conditions per place. [2024-06-27 23:32:22,519 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 415 selfloop transitions, 88 changer transitions 0/507 dead transitions. [2024-06-27 23:32:22,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 507 transitions, 8384 flow [2024-06-27 23:32:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 23:32:22,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 23:32:22,520 INFO L175 Difference]: Start difference. First operand has 241 places, 473 transitions, 6742 flow. Second operand 10 states and 184 transitions. [2024-06-27 23:32:22,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 507 transitions, 8384 flow [2024-06-27 23:32:23,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 507 transitions, 8155 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 23:32:23,099 INFO L231 Difference]: Finished difference. Result has 247 places, 477 transitions, 6818 flow [2024-06-27 23:32:23,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6818, PETRI_PLACES=247, PETRI_TRANSITIONS=477} [2024-06-27 23:32:23,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-27 23:32:23,100 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 477 transitions, 6818 flow [2024-06-27 23:32:23,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:23,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:23,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:32:23,100 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:23,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2094304294, now seen corresponding path program 2 times [2024-06-27 23:32:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193710115] [2024-06-27 23:32:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:24,577 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 23:32:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193710115] [2024-06-27 23:32:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193710115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:24,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:24,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533619088] [2024-06-27 23:32:24,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:24,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:32:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 477 transitions, 6818 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:24,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:24,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:32:24,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:26,008 INFO L124 PetriNetUnfolderBase]: 3347/4991 cut-off events. [2024-06-27 23:32:26,008 INFO L125 PetriNetUnfolderBase]: For 532463/532469 co-relation queries the response was YES. [2024-06-27 23:32:26,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51136 conditions, 4991 events. 3347/4991 cut-off events. For 532463/532469 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25216 event pairs, 665 based on Foata normal form. 5/4990 useless extension candidates. Maximal degree in co-relation 51030. Up to 4308 conditions per place. [2024-06-27 23:32:26,064 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 339 selfloop transitions, 101 changer transitions 0/507 dead transitions. [2024-06-27 23:32:26,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 507 transitions, 7907 flow [2024-06-27 23:32:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 23:32:26,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:32:26,066 INFO L175 Difference]: Start difference. First operand has 247 places, 477 transitions, 6818 flow. Second operand 9 states and 180 transitions. [2024-06-27 23:32:26,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 507 transitions, 7907 flow [2024-06-27 23:32:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 507 transitions, 7636 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:26,754 INFO L231 Difference]: Finished difference. Result has 248 places, 480 transitions, 6873 flow [2024-06-27 23:32:26,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6873, PETRI_PLACES=248, PETRI_TRANSITIONS=480} [2024-06-27 23:32:26,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 23:32:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 480 transitions, 6873 flow [2024-06-27 23:32:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:26,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:26,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:32:26,756 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:26,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1193660410, now seen corresponding path program 3 times [2024-06-27 23:32:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225260137] [2024-06-27 23:32:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:27,988 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 23:32:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225260137] [2024-06-27 23:32:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225260137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:27,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:27,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:27,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575439673] [2024-06-27 23:32:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:28,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:28,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 480 transitions, 6873 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:29,264 INFO L124 PetriNetUnfolderBase]: 3455/5101 cut-off events. [2024-06-27 23:32:29,265 INFO L125 PetriNetUnfolderBase]: For 554228/554236 co-relation queries the response was YES. [2024-06-27 23:32:29,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52356 conditions, 5101 events. 3455/5101 cut-off events. For 554228/554236 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25372 event pairs, 752 based on Foata normal form. 11/5107 useless extension candidates. Maximal degree in co-relation 52249. Up to 4581 conditions per place. [2024-06-27 23:32:29,324 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 392 selfloop transitions, 116 changer transitions 0/512 dead transitions. [2024-06-27 23:32:29,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 512 transitions, 8550 flow [2024-06-27 23:32:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:32:29,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 23:32:29,325 INFO L175 Difference]: Start difference. First operand has 248 places, 480 transitions, 6873 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:32:29,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 512 transitions, 8550 flow [2024-06-27 23:32:29,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 512 transitions, 8194 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:29,903 INFO L231 Difference]: Finished difference. Result has 250 places, 480 transitions, 6761 flow [2024-06-27 23:32:29,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6517, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=250, PETRI_TRANSITIONS=480} [2024-06-27 23:32:29,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 23:32:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 480 transitions, 6761 flow [2024-06-27 23:32:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:29,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:32:29,904 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:29,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1921814218, now seen corresponding path program 4 times [2024-06-27 23:32:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737071018] [2024-06-27 23:32:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:31,219 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 23:32:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737071018] [2024-06-27 23:32:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737071018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:31,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398835459] [2024-06-27 23:32:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:31,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:31,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:31,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 480 transitions, 6761 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:31,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:32,603 INFO L124 PetriNetUnfolderBase]: 3505/5172 cut-off events. [2024-06-27 23:32:32,603 INFO L125 PetriNetUnfolderBase]: For 578000/578008 co-relation queries the response was YES. [2024-06-27 23:32:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53594 conditions, 5172 events. 3505/5172 cut-off events. For 578000/578008 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25794 event pairs, 697 based on Foata normal form. 11/5178 useless extension candidates. Maximal degree in co-relation 53486. Up to 4415 conditions per place. [2024-06-27 23:32:32,668 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 374 selfloop transitions, 144 changer transitions 0/522 dead transitions. [2024-06-27 23:32:32,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 522 transitions, 8868 flow [2024-06-27 23:32:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:32:32,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:32:32,669 INFO L175 Difference]: Start difference. First operand has 250 places, 480 transitions, 6761 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:32:32,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 522 transitions, 8868 flow [2024-06-27 23:32:33,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 522 transitions, 8574 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:33,456 INFO L231 Difference]: Finished difference. Result has 253 places, 488 transitions, 7011 flow [2024-06-27 23:32:33,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7011, PETRI_PLACES=253, PETRI_TRANSITIONS=488} [2024-06-27 23:32:33,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 23:32:33,457 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 488 transitions, 7011 flow [2024-06-27 23:32:33,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:33,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:33,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:33,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:32:33,457 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:33,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1921814404, now seen corresponding path program 3 times [2024-06-27 23:32:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:33,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311463704] [2024-06-27 23:32:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:33,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:34,889 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 23:32:34,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:34,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311463704] [2024-06-27 23:32:34,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311463704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:34,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:34,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:34,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963947714] [2024-06-27 23:32:34,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:34,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:34,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:35,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:32:35,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 488 transitions, 7011 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:35,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:35,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:32:35,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:36,358 INFO L124 PetriNetUnfolderBase]: 3405/5077 cut-off events. [2024-06-27 23:32:36,358 INFO L125 PetriNetUnfolderBase]: For 600838/600844 co-relation queries the response was YES. [2024-06-27 23:32:36,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53930 conditions, 5077 events. 3405/5077 cut-off events. For 600838/600844 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25727 event pairs, 666 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 53821. Up to 4324 conditions per place. [2024-06-27 23:32:36,413 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 335 selfloop transitions, 114 changer transitions 0/518 dead transitions. [2024-06-27 23:32:36,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 518 transitions, 8132 flow [2024-06-27 23:32:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 23:32:36,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 23:32:36,414 INFO L175 Difference]: Start difference. First operand has 253 places, 488 transitions, 7011 flow. Second operand 10 states and 191 transitions. [2024-06-27 23:32:36,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 518 transitions, 8132 flow [2024-06-27 23:32:37,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 518 transitions, 7856 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 23:32:37,130 INFO L231 Difference]: Finished difference. Result has 258 places, 491 transitions, 7096 flow [2024-06-27 23:32:37,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7096, PETRI_PLACES=258, PETRI_TRANSITIONS=491} [2024-06-27 23:32:37,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-27 23:32:37,130 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 491 transitions, 7096 flow [2024-06-27 23:32:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:37,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:37,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:32:37,131 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:37,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:37,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1921807460, now seen corresponding path program 2 times [2024-06-27 23:32:37,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:37,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26340315] [2024-06-27 23:32:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:38,605 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 23:32:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26340315] [2024-06-27 23:32:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26340315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:38,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:38,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712757560] [2024-06-27 23:32:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:38,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:38,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:38,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 491 transitions, 7096 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:38,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:38,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:39,937 INFO L124 PetriNetUnfolderBase]: 3534/5215 cut-off events. [2024-06-27 23:32:39,937 INFO L125 PetriNetUnfolderBase]: For 625815/625819 co-relation queries the response was YES. [2024-06-27 23:32:39,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55769 conditions, 5215 events. 3534/5215 cut-off events. For 625815/625819 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26066 event pairs, 704 based on Foata normal form. 7/5218 useless extension candidates. Maximal degree in co-relation 55658. Up to 4790 conditions per place. [2024-06-27 23:32:39,997 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 406 selfloop transitions, 115 changer transitions 0/525 dead transitions. [2024-06-27 23:32:39,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 525 transitions, 8834 flow [2024-06-27 23:32:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 23:32:39,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 23:32:39,998 INFO L175 Difference]: Start difference. First operand has 258 places, 491 transitions, 7096 flow. Second operand 9 states and 177 transitions. [2024-06-27 23:32:39,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 525 transitions, 8834 flow [2024-06-27 23:32:40,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 525 transitions, 8499 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 23:32:40,679 INFO L231 Difference]: Finished difference. Result has 259 places, 495 transitions, 7135 flow [2024-06-27 23:32:40,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6761, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7135, PETRI_PLACES=259, PETRI_TRANSITIONS=495} [2024-06-27 23:32:40,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-27 23:32:40,680 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 495 transitions, 7135 flow [2024-06-27 23:32:40,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:40,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:40,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:40,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:32:40,680 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:40,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1921807708, now seen corresponding path program 5 times [2024-06-27 23:32:40,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264733519] [2024-06-27 23:32:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:41,990 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 23:32:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264733519] [2024-06-27 23:32:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264733519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180284648] [2024-06-27 23:32:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:41,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:41,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:42,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:42,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 495 transitions, 7135 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:42,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:42,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:42,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:43,342 INFO L124 PetriNetUnfolderBase]: 3552/5245 cut-off events. [2024-06-27 23:32:43,342 INFO L125 PetriNetUnfolderBase]: For 644844/644852 co-relation queries the response was YES. [2024-06-27 23:32:43,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56804 conditions, 5245 events. 3552/5245 cut-off events. For 644844/644852 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26259 event pairs, 698 based on Foata normal form. 11/5251 useless extension candidates. Maximal degree in co-relation 56692. Up to 4476 conditions per place. [2024-06-27 23:32:43,406 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 380 selfloop transitions, 148 changer transitions 0/532 dead transitions. [2024-06-27 23:32:43,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 532 transitions, 9089 flow [2024-06-27 23:32:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:32:43,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:32:43,408 INFO L175 Difference]: Start difference. First operand has 259 places, 495 transitions, 7135 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:32:43,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 532 transitions, 9089 flow [2024-06-27 23:32:44,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 532 transitions, 8747 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:44,110 INFO L231 Difference]: Finished difference. Result has 262 places, 499 transitions, 7224 flow [2024-06-27 23:32:44,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7224, PETRI_PLACES=262, PETRI_TRANSITIONS=499} [2024-06-27 23:32:44,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-27 23:32:44,111 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 499 transitions, 7224 flow [2024-06-27 23:32:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:44,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:44,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:32:44,111 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:44,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1091050836, now seen corresponding path program 3 times [2024-06-27 23:32:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:44,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030429953] [2024-06-27 23:32:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:44,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:32:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:45,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030429953] [2024-06-27 23:32:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030429953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:45,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:45,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:32:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957690590] [2024-06-27 23:32:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:45,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:32:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:32:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:32:45,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:45,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 499 transitions, 7224 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:45,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:45,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:45,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:47,396 INFO L124 PetriNetUnfolderBase]: 3594/5301 cut-off events. [2024-06-27 23:32:47,396 INFO L125 PetriNetUnfolderBase]: For 672398/672402 co-relation queries the response was YES. [2024-06-27 23:32:47,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58013 conditions, 5301 events. 3594/5301 cut-off events. For 672398/672402 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26571 event pairs, 705 based on Foata normal form. 7/5304 useless extension candidates. Maximal degree in co-relation 57900. Up to 4788 conditions per place. [2024-06-27 23:32:47,456 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 388 selfloop transitions, 146 changer transitions 0/538 dead transitions. [2024-06-27 23:32:47,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 538 transitions, 9268 flow [2024-06-27 23:32:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:32:47,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 23:32:47,457 INFO L175 Difference]: Start difference. First operand has 262 places, 499 transitions, 7224 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:32:47,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 538 transitions, 9268 flow [2024-06-27 23:32:48,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 538 transitions, 8902 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:48,195 INFO L231 Difference]: Finished difference. Result has 265 places, 507 transitions, 7440 flow [2024-06-27 23:32:48,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7440, PETRI_PLACES=265, PETRI_TRANSITIONS=507} [2024-06-27 23:32:48,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-27 23:32:48,196 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 507 transitions, 7440 flow [2024-06-27 23:32:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:48,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:48,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:32:48,196 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:48,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash -440049400, now seen corresponding path program 6 times [2024-06-27 23:32:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:48,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851355354] [2024-06-27 23:32:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:48,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:49,507 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 23:32:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851355354] [2024-06-27 23:32:49,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851355354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046699965] [2024-06-27 23:32:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:49,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:49,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 507 transitions, 7440 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:49,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:49,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:49,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:50,953 INFO L124 PetriNetUnfolderBase]: 3596/5308 cut-off events. [2024-06-27 23:32:50,954 INFO L125 PetriNetUnfolderBase]: For 691111/691119 co-relation queries the response was YES. [2024-06-27 23:32:50,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58577 conditions, 5308 events. 3596/5308 cut-off events. For 691111/691119 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26593 event pairs, 697 based on Foata normal form. 11/5314 useless extension candidates. Maximal degree in co-relation 58463. Up to 4541 conditions per place. [2024-06-27 23:32:51,017 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 177 changer transitions 0/541 dead transitions. [2024-06-27 23:32:51,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 541 transitions, 9121 flow [2024-06-27 23:32:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 23:32:51,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:32:51,018 INFO L175 Difference]: Start difference. First operand has 265 places, 507 transitions, 7440 flow. Second operand 10 states and 190 transitions. [2024-06-27 23:32:51,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 541 transitions, 9121 flow [2024-06-27 23:32:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 541 transitions, 8798 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 23:32:51,792 INFO L231 Difference]: Finished difference. Result has 269 places, 511 transitions, 7613 flow [2024-06-27 23:32:51,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7613, PETRI_PLACES=269, PETRI_TRANSITIONS=511} [2024-06-27 23:32:51,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 23:32:51,792 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 511 transitions, 7613 flow [2024-06-27 23:32:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:51,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:51,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:51,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:32:51,793 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:51,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1384200070, now seen corresponding path program 4 times [2024-06-27 23:32:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417617067] [2024-06-27 23:32:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:53,292 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 23:32:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417617067] [2024-06-27 23:32:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417617067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:53,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:53,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:32:53,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048901595] [2024-06-27 23:32:53,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:53,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:32:53,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:32:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:32:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:32:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 511 transitions, 7613 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:32:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:54,718 INFO L124 PetriNetUnfolderBase]: 3590/5296 cut-off events. [2024-06-27 23:32:54,718 INFO L125 PetriNetUnfolderBase]: For 705361/705365 co-relation queries the response was YES. [2024-06-27 23:32:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59050 conditions, 5296 events. 3590/5296 cut-off events. For 705361/705365 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26482 event pairs, 704 based on Foata normal form. 7/5299 useless extension candidates. Maximal degree in co-relation 58934. Up to 4871 conditions per place. [2024-06-27 23:32:54,781 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 408 selfloop transitions, 128 changer transitions 0/540 dead transitions. [2024-06-27 23:32:54,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 540 transitions, 9161 flow [2024-06-27 23:32:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:32:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:32:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:32:54,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 23:32:54,782 INFO L175 Difference]: Start difference. First operand has 269 places, 511 transitions, 7613 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:32:54,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 540 transitions, 9161 flow [2024-06-27 23:32:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 540 transitions, 8725 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:55,620 INFO L231 Difference]: Finished difference. Result has 271 places, 511 transitions, 7443 flow [2024-06-27 23:32:55,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7443, PETRI_PLACES=271, PETRI_TRANSITIONS=511} [2024-06-27 23:32:55,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 23:32:55,621 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 511 transitions, 7443 flow [2024-06-27 23:32:55,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:32:55,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:55,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:55,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:32:55,621 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:55,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1200162598, now seen corresponding path program 1 times [2024-06-27 23:32:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:55,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213133224] [2024-06-27 23:32:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:55,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:32:57,324 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 23:32:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:32:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213133224] [2024-06-27 23:32:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213133224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:32:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:32:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:32:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536700793] [2024-06-27 23:32:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:32:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:32:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:32:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:32:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:32:57,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:32:57,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 511 transitions, 7443 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:57,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:32:57,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:32:57,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:32:58,907 INFO L124 PetriNetUnfolderBase]: 3468/5179 cut-off events. [2024-06-27 23:32:58,907 INFO L125 PetriNetUnfolderBase]: For 736451/736489 co-relation queries the response was YES. [2024-06-27 23:32:58,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57917 conditions, 5179 events. 3468/5179 cut-off events. For 736451/736489 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26644 event pairs, 728 based on Foata normal form. 33/5196 useless extension candidates. Maximal degree in co-relation 57800. Up to 4645 conditions per place. [2024-06-27 23:32:58,971 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 431 selfloop transitions, 56 changer transitions 0/544 dead transitions. [2024-06-27 23:32:58,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 544 transitions, 9029 flow [2024-06-27 23:32:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:32:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:32:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 23:32:58,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 23:32:58,972 INFO L175 Difference]: Start difference. First operand has 271 places, 511 transitions, 7443 flow. Second operand 10 states and 189 transitions. [2024-06-27 23:32:58,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 544 transitions, 9029 flow [2024-06-27 23:32:59,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 544 transitions, 8759 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 23:32:59,911 INFO L231 Difference]: Finished difference. Result has 274 places, 514 transitions, 7428 flow [2024-06-27 23:32:59,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7173, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7428, PETRI_PLACES=274, PETRI_TRANSITIONS=514} [2024-06-27 23:32:59,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 23:32:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 514 transitions, 7428 flow [2024-06-27 23:32:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:32:59,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:32:59,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:32:59,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:32:59,912 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:32:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:32:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1906075114, now seen corresponding path program 1 times [2024-06-27 23:32:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:32:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564068353] [2024-06-27 23:32:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:32:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:32:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:01,080 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 23:33:01,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:01,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564068353] [2024-06-27 23:33:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564068353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:33:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265228556] [2024-06-27 23:33:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:33:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:33:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:33:01,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:01,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 514 transitions, 7428 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:01,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:01,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:01,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:02,412 INFO L124 PetriNetUnfolderBase]: 3470/5182 cut-off events. [2024-06-27 23:33:02,412 INFO L125 PetriNetUnfolderBase]: For 745440/745478 co-relation queries the response was YES. [2024-06-27 23:33:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58160 conditions, 5182 events. 3470/5182 cut-off events. For 745440/745478 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26657 event pairs, 735 based on Foata normal form. 29/5195 useless extension candidates. Maximal degree in co-relation 58042. Up to 4760 conditions per place. [2024-06-27 23:33:02,474 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 443 selfloop transitions, 30 changer transitions 0/530 dead transitions. [2024-06-27 23:33:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 530 transitions, 8738 flow [2024-06-27 23:33:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:33:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:33:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 23:33:02,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 23:33:02,475 INFO L175 Difference]: Start difference. First operand has 274 places, 514 transitions, 7428 flow. Second operand 6 states and 118 transitions. [2024-06-27 23:33:02,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 530 transitions, 8738 flow [2024-06-27 23:33:03,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 530 transitions, 8491 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 23:33:03,355 INFO L231 Difference]: Finished difference. Result has 271 places, 517 transitions, 7321 flow [2024-06-27 23:33:03,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7187, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7321, PETRI_PLACES=271, PETRI_TRANSITIONS=517} [2024-06-27 23:33:03,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-27 23:33:03,355 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 517 transitions, 7321 flow [2024-06-27 23:33:03,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:03,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:03,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:03,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:33:03,356 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:03,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644748, now seen corresponding path program 5 times [2024-06-27 23:33:03,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:03,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360019906] [2024-06-27 23:33:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:04,981 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 23:33:04,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360019906] [2024-06-27 23:33:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360019906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:04,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:04,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:33:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219190657] [2024-06-27 23:33:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:33:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:33:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:33:05,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:05,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 517 transitions, 7321 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:05,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:05,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:05,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:06,510 INFO L124 PetriNetUnfolderBase]: 3638/5371 cut-off events. [2024-06-27 23:33:06,510 INFO L125 PetriNetUnfolderBase]: For 767488/767494 co-relation queries the response was YES. [2024-06-27 23:33:06,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59862 conditions, 5371 events. 3638/5371 cut-off events. For 767488/767494 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27030 event pairs, 691 based on Foata normal form. 9/5376 useless extension candidates. Maximal degree in co-relation 59742. Up to 4624 conditions per place. [2024-06-27 23:33:06,569 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 374 selfloop transitions, 172 changer transitions 0/550 dead transitions. [2024-06-27 23:33:06,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 550 transitions, 9061 flow [2024-06-27 23:33:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 23:33:06,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 23:33:06,570 INFO L175 Difference]: Start difference. First operand has 271 places, 517 transitions, 7321 flow. Second operand 10 states and 186 transitions. [2024-06-27 23:33:06,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 550 transitions, 9061 flow [2024-06-27 23:33:07,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 550 transitions, 9002 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 23:33:07,120 INFO L231 Difference]: Finished difference. Result has 279 places, 521 transitions, 7773 flow [2024-06-27 23:33:07,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7773, PETRI_PLACES=279, PETRI_TRANSITIONS=521} [2024-06-27 23:33:07,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-27 23:33:07,121 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 521 transitions, 7773 flow [2024-06-27 23:33:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:07,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:07,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:07,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:33:07,121 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:07,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644500, now seen corresponding path program 7 times [2024-06-27 23:33:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645560956] [2024-06-27 23:33:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:08,501 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 23:33:08,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:08,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645560956] [2024-06-27 23:33:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645560956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:08,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:08,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637717865] [2024-06-27 23:33:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:08,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:08,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:08,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:08,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 521 transitions, 7773 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:08,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:08,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:08,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:09,932 INFO L124 PetriNetUnfolderBase]: 3712/5482 cut-off events. [2024-06-27 23:33:09,932 INFO L125 PetriNetUnfolderBase]: For 813981/813993 co-relation queries the response was YES. [2024-06-27 23:33:09,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63099 conditions, 5482 events. 3712/5482 cut-off events. For 813981/813993 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27694 event pairs, 679 based on Foata normal form. 15/5492 useless extension candidates. Maximal degree in co-relation 62977. Up to 4088 conditions per place. [2024-06-27 23:33:09,998 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 358 selfloop transitions, 211 changer transitions 0/573 dead transitions. [2024-06-27 23:33:09,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 573 transitions, 10640 flow [2024-06-27 23:33:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:33:09,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:33:09,999 INFO L175 Difference]: Start difference. First operand has 279 places, 521 transitions, 7773 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:33:09,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 573 transitions, 10640 flow [2024-06-27 23:33:10,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 573 transitions, 10180 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:10,924 INFO L231 Difference]: Finished difference. Result has 284 places, 536 transitions, 8293 flow [2024-06-27 23:33:10,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8293, PETRI_PLACES=284, PETRI_TRANSITIONS=536} [2024-06-27 23:33:10,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-27 23:33:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 536 transitions, 8293 flow [2024-06-27 23:33:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:33:10,925 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:10,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407350, now seen corresponding path program 8 times [2024-06-27 23:33:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598080418] [2024-06-27 23:33:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:12,317 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 23:33:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598080418] [2024-06-27 23:33:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598080418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:12,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:12,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39096229] [2024-06-27 23:33:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:12,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:12,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:12,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 536 transitions, 8293 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:12,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:12,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:12,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:13,807 INFO L124 PetriNetUnfolderBase]: 3730/5508 cut-off events. [2024-06-27 23:33:13,807 INFO L125 PetriNetUnfolderBase]: For 845585/845597 co-relation queries the response was YES. [2024-06-27 23:33:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 5508 events. 3730/5508 cut-off events. For 845585/845597 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27851 event pairs, 679 based on Foata normal form. 15/5518 useless extension candidates. Maximal degree in co-relation 64455. Up to 4107 conditions per place. [2024-06-27 23:33:13,878 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 213 changer transitions 0/577 dead transitions. [2024-06-27 23:33:13,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 577 transitions, 10873 flow [2024-06-27 23:33:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:33:13,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:33:13,879 INFO L175 Difference]: Start difference. First operand has 284 places, 536 transitions, 8293 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:33:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 577 transitions, 10873 flow [2024-06-27 23:33:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 577 transitions, 10527 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-27 23:33:14,827 INFO L231 Difference]: Finished difference. Result has 290 places, 540 transitions, 8554 flow [2024-06-27 23:33:14,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8554, PETRI_PLACES=290, PETRI_TRANSITIONS=540} [2024-06-27 23:33:14,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 23:33:14,828 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 540 transitions, 8554 flow [2024-06-27 23:33:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:14,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:14,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:33:14,828 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:14,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653428, now seen corresponding path program 2 times [2024-06-27 23:33:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380415025] [2024-06-27 23:33:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:16,426 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 23:33:16,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:16,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380415025] [2024-06-27 23:33:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380415025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273179549] [2024-06-27 23:33:16,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:16,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:16,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:16,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 540 transitions, 8554 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:18,029 INFO L124 PetriNetUnfolderBase]: 3598/5374 cut-off events. [2024-06-27 23:33:18,029 INFO L125 PetriNetUnfolderBase]: For 875840/875880 co-relation queries the response was YES. [2024-06-27 23:33:18,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63787 conditions, 5374 events. 3598/5374 cut-off events. For 875840/875880 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 27903 event pairs, 723 based on Foata normal form. 35/5393 useless extension candidates. Maximal degree in co-relation 63660. Up to 4729 conditions per place. [2024-06-27 23:33:18,097 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 441 selfloop transitions, 74 changer transitions 0/573 dead transitions. [2024-06-27 23:33:18,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 573 transitions, 10244 flow [2024-06-27 23:33:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 23:33:18,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:33:18,098 INFO L175 Difference]: Start difference. First operand has 290 places, 540 transitions, 8554 flow. Second operand 9 states and 180 transitions. [2024-06-27 23:33:18,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 573 transitions, 10244 flow [2024-06-27 23:33:19,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 573 transitions, 9736 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:19,143 INFO L231 Difference]: Finished difference. Result has 292 places, 543 transitions, 8350 flow [2024-06-27 23:33:19,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8350, PETRI_PLACES=292, PETRI_TRANSITIONS=543} [2024-06-27 23:33:19,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 23:33:19,144 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 543 transitions, 8350 flow [2024-06-27 23:33:19,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:19,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:19,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:33:19,144 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:19,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653118, now seen corresponding path program 6 times [2024-06-27 23:33:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755508673] [2024-06-27 23:33:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:20,824 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 23:33:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755508673] [2024-06-27 23:33:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755508673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:20,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:33:20,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205441126] [2024-06-27 23:33:20,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:20,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:33:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:33:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:33:20,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:20,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 543 transitions, 8350 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:20,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:20,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:20,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:22,461 INFO L124 PetriNetUnfolderBase]: 3800/5606 cut-off events. [2024-06-27 23:33:22,461 INFO L125 PetriNetUnfolderBase]: For 897005/897011 co-relation queries the response was YES. [2024-06-27 23:33:22,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66301 conditions, 5606 events. 3800/5606 cut-off events. For 897005/897011 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 28415 event pairs, 692 based on Foata normal form. 9/5611 useless extension candidates. Maximal degree in co-relation 66173. Up to 4817 conditions per place. [2024-06-27 23:33:22,534 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 183 changer transitions 0/582 dead transitions. [2024-06-27 23:33:22,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 582 transitions, 10634 flow [2024-06-27 23:33:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 23:33:22,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 23:33:22,535 INFO L175 Difference]: Start difference. First operand has 292 places, 543 transitions, 8350 flow. Second operand 10 states and 189 transitions. [2024-06-27 23:33:22,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 582 transitions, 10634 flow [2024-06-27 23:33:23,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 582 transitions, 10354 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:23,832 INFO L231 Difference]: Finished difference. Result has 295 places, 551 transitions, 8785 flow [2024-06-27 23:33:23,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8785, PETRI_PLACES=295, PETRI_TRANSITIONS=551} [2024-06-27 23:33:23,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-27 23:33:23,833 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 551 transitions, 8785 flow [2024-06-27 23:33:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:23,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:23,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:23,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:33:23,833 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:23,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1704413860, now seen corresponding path program 9 times [2024-06-27 23:33:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:23,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145581037] [2024-06-27 23:33:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:25,213 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 23:33:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145581037] [2024-06-27 23:33:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145581037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105024454] [2024-06-27 23:33:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:25,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:25,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 551 transitions, 8785 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:25,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:26,872 INFO L124 PetriNetUnfolderBase]: 3794/5604 cut-off events. [2024-06-27 23:33:26,872 INFO L125 PetriNetUnfolderBase]: For 918241/918253 co-relation queries the response was YES. [2024-06-27 23:33:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66954 conditions, 5604 events. 3794/5604 cut-off events. For 918241/918253 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 28515 event pairs, 679 based on Foata normal form. 15/5614 useless extension candidates. Maximal degree in co-relation 66825. Up to 4207 conditions per place. [2024-06-27 23:33:26,947 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 370 selfloop transitions, 213 changer transitions 0/587 dead transitions. [2024-06-27 23:33:26,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 587 transitions, 11124 flow [2024-06-27 23:33:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:33:26,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:33:26,948 INFO L175 Difference]: Start difference. First operand has 295 places, 551 transitions, 8785 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:33:26,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 587 transitions, 11124 flow [2024-06-27 23:33:28,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 587 transitions, 10632 flow, removed 145 selfloop flow, removed 6 redundant places. [2024-06-27 23:33:28,073 INFO L231 Difference]: Finished difference. Result has 299 places, 551 transitions, 8728 flow [2024-06-27 23:33:28,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8293, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8728, PETRI_PLACES=299, PETRI_TRANSITIONS=551} [2024-06-27 23:33:28,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-27 23:33:28,074 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 551 transitions, 8728 flow [2024-06-27 23:33:28,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:28,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:28,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:28,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:33:28,074 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:28,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:28,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407164, now seen corresponding path program 4 times [2024-06-27 23:33:28,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:28,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200563316] [2024-06-27 23:33:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:28,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:29,585 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 23:33:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:29,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200563316] [2024-06-27 23:33:29,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200563316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:29,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:29,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495759884] [2024-06-27 23:33:29,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:29,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:29,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 551 transitions, 8728 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:29,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:29,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:29,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:31,132 INFO L124 PetriNetUnfolderBase]: 3688/5501 cut-off events. [2024-06-27 23:33:31,133 INFO L125 PetriNetUnfolderBase]: For 936779/936792 co-relation queries the response was YES. [2024-06-27 23:33:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66891 conditions, 5501 events. 3688/5501 cut-off events. For 936779/936792 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28368 event pairs, 679 based on Foata normal form. 9/5504 useless extension candidates. Maximal degree in co-relation 66760. Up to 4473 conditions per place. [2024-06-27 23:33:31,206 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 342 selfloop transitions, 158 changer transitions 0/585 dead transitions. [2024-06-27 23:33:31,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 585 transitions, 10404 flow [2024-06-27 23:33:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 23:33:31,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 23:33:31,207 INFO L175 Difference]: Start difference. First operand has 299 places, 551 transitions, 8728 flow. Second operand 9 states and 180 transitions. [2024-06-27 23:33:31,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 585 transitions, 10404 flow [2024-06-27 23:33:32,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 585 transitions, 9968 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 23:33:32,365 INFO L231 Difference]: Finished difference. Result has 300 places, 557 transitions, 8914 flow [2024-06-27 23:33:32,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8292, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8914, PETRI_PLACES=300, PETRI_TRANSITIONS=557} [2024-06-27 23:33:32,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 23:33:32,365 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 557 transitions, 8914 flow [2024-06-27 23:33:32,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:32,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:32,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:33:32,366 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:32,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1704414108, now seen corresponding path program 7 times [2024-06-27 23:33:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324911728] [2024-06-27 23:33:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:33:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324911728] [2024-06-27 23:33:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324911728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:34,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:34,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:33:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210372951] [2024-06-27 23:33:34,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:34,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:33:34,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:33:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:33:34,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:34,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 557 transitions, 8914 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:34,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:34,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:34,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:35,584 INFO L124 PetriNetUnfolderBase]: 3799/5606 cut-off events. [2024-06-27 23:33:35,584 INFO L125 PetriNetUnfolderBase]: For 958936/958942 co-relation queries the response was YES. [2024-06-27 23:33:35,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67837 conditions, 5606 events. 3799/5606 cut-off events. For 958936/958942 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28371 event pairs, 741 based on Foata normal form. 9/5611 useless extension candidates. Maximal degree in co-relation 67705. Up to 4859 conditions per place. [2024-06-27 23:33:35,656 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 171 changer transitions 0/587 dead transitions. [2024-06-27 23:33:35,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 587 transitions, 10766 flow [2024-06-27 23:33:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 23:33:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 23:33:35,657 INFO L175 Difference]: Start difference. First operand has 300 places, 557 transitions, 8914 flow. Second operand 10 states and 186 transitions. [2024-06-27 23:33:35,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 587 transitions, 10766 flow [2024-06-27 23:33:37,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 587 transitions, 10444 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-27 23:33:37,319 INFO L231 Difference]: Finished difference. Result has 305 places, 557 transitions, 8943 flow [2024-06-27 23:33:37,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8592, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8943, PETRI_PLACES=305, PETRI_TRANSITIONS=557} [2024-06-27 23:33:37,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 23:33:37,320 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 557 transitions, 8943 flow [2024-06-27 23:33:37,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:37,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:37,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:33:37,320 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:37,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872628, now seen corresponding path program 3 times [2024-06-27 23:33:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425695587] [2024-06-27 23:33:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:38,956 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 23:33:38,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:38,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425695587] [2024-06-27 23:33:38,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425695587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:38,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:38,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:38,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332747461] [2024-06-27 23:33:38,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:38,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:38,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:38,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:39,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 557 transitions, 8943 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:39,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:39,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:39,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:40,662 INFO L124 PetriNetUnfolderBase]: 3667/5478 cut-off events. [2024-06-27 23:33:40,662 INFO L125 PetriNetUnfolderBase]: For 991924/991964 co-relation queries the response was YES. [2024-06-27 23:33:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67315 conditions, 5478 events. 3667/5478 cut-off events. For 991924/991964 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28467 event pairs, 778 based on Foata normal form. 35/5497 useless extension candidates. Maximal degree in co-relation 67181. Up to 4743 conditions per place. [2024-06-27 23:33:40,731 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 421 selfloop transitions, 108 changer transitions 0/589 dead transitions. [2024-06-27 23:33:40,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 589 transitions, 10555 flow [2024-06-27 23:33:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 23:33:40,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:33:40,732 INFO L175 Difference]: Start difference. First operand has 305 places, 557 transitions, 8943 flow. Second operand 10 states and 190 transitions. [2024-06-27 23:33:40,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 589 transitions, 10555 flow [2024-06-27 23:33:41,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 589 transitions, 10189 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:33:41,856 INFO L231 Difference]: Finished difference. Result has 306 places, 560 transitions, 8961 flow [2024-06-27 23:33:41,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8961, PETRI_PLACES=306, PETRI_TRANSITIONS=560} [2024-06-27 23:33:41,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-27 23:33:41,857 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 560 transitions, 8961 flow [2024-06-27 23:33:41,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:41,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:41,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:41,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:33:41,857 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:41,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1256785136, now seen corresponding path program 8 times [2024-06-27 23:33:41,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:41,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525980256] [2024-06-27 23:33:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:43,463 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 23:33:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:43,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525980256] [2024-06-27 23:33:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525980256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:43,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:43,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992523298] [2024-06-27 23:33:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:43,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:43,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:43,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:43,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 560 transitions, 8961 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:43,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:45,045 INFO L124 PetriNetUnfolderBase]: 3853/5687 cut-off events. [2024-06-27 23:33:45,045 INFO L125 PetriNetUnfolderBase]: For 1015305/1015311 co-relation queries the response was YES. [2024-06-27 23:33:45,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69975 conditions, 5687 events. 3853/5687 cut-off events. For 1015305/1015311 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 28958 event pairs, 741 based on Foata normal form. 9/5692 useless extension candidates. Maximal degree in co-relation 69840. Up to 4662 conditions per place. [2024-06-27 23:33:45,122 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 327 selfloop transitions, 267 changer transitions 0/598 dead transitions. [2024-06-27 23:33:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 598 transitions, 11205 flow [2024-06-27 23:33:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:33:45,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:33:45,123 INFO L175 Difference]: Start difference. First operand has 306 places, 560 transitions, 8961 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:33:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 598 transitions, 11205 flow [2024-06-27 23:33:46,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 598 transitions, 10845 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 23:33:46,476 INFO L231 Difference]: Finished difference. Result has 307 places, 568 transitions, 9512 flow [2024-06-27 23:33:46,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9512, PETRI_PLACES=307, PETRI_TRANSITIONS=568} [2024-06-27 23:33:46,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 23:33:46,477 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 568 transitions, 9512 flow [2024-06-27 23:33:46,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:33:46,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:46,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:33:46,477 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:46,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1989753298, now seen corresponding path program 4 times [2024-06-27 23:33:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657508822] [2024-06-27 23:33:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:48,070 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 23:33:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657508822] [2024-06-27 23:33:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657508822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:48,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076609757] [2024-06-27 23:33:48,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:48,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 568 transitions, 9512 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:48,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:48,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:48,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:49,680 INFO L124 PetriNetUnfolderBase]: 3721/5559 cut-off events. [2024-06-27 23:33:49,680 INFO L125 PetriNetUnfolderBase]: For 1053804/1053844 co-relation queries the response was YES. [2024-06-27 23:33:49,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69696 conditions, 5559 events. 3721/5559 cut-off events. For 1053804/1053844 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28917 event pairs, 777 based on Foata normal form. 35/5578 useless extension candidates. Maximal degree in co-relation 69560. Up to 4887 conditions per place. [2024-06-27 23:33:49,759 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 85 changer transitions 0/600 dead transitions. [2024-06-27 23:33:49,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 600 transitions, 11160 flow [2024-06-27 23:33:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:33:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:33:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 23:33:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-27 23:33:49,760 INFO L175 Difference]: Start difference. First operand has 307 places, 568 transitions, 9512 flow. Second operand 9 states and 179 transitions. [2024-06-27 23:33:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 600 transitions, 11160 flow [2024-06-27 23:33:51,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 600 transitions, 10661 flow, removed 105 selfloop flow, removed 5 redundant places. [2024-06-27 23:33:51,183 INFO L231 Difference]: Finished difference. Result has 311 places, 571 transitions, 9361 flow [2024-06-27 23:33:51,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9013, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9361, PETRI_PLACES=311, PETRI_TRANSITIONS=571} [2024-06-27 23:33:51,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 23:33:51,184 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 571 transitions, 9361 flow [2024-06-27 23:33:51,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:51,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:51,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:33:51,184 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:51,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2000228818, now seen corresponding path program 5 times [2024-06-27 23:33:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539595271] [2024-06-27 23:33:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:52,824 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 23:33:52,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:52,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539595271] [2024-06-27 23:33:52,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539595271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:52,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:52,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:33:52,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026460822] [2024-06-27 23:33:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:33:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:33:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:33:52,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:33:52,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 571 transitions, 9361 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:52,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:52,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:33:52,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:54,575 INFO L124 PetriNetUnfolderBase]: 3762/5622 cut-off events. [2024-06-27 23:33:54,575 INFO L125 PetriNetUnfolderBase]: For 1087292/1087332 co-relation queries the response was YES. [2024-06-27 23:33:54,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71070 conditions, 5622 events. 3762/5622 cut-off events. For 1087292/1087332 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29392 event pairs, 736 based on Foata normal form. 35/5641 useless extension candidates. Maximal degree in co-relation 70932. Up to 4698 conditions per place. [2024-06-27 23:33:54,649 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 422 selfloop transitions, 125 changer transitions 0/609 dead transitions. [2024-06-27 23:33:54,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 609 transitions, 11511 flow [2024-06-27 23:33:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:33:54,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:33:54,650 INFO L175 Difference]: Start difference. First operand has 311 places, 571 transitions, 9361 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:33:54,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 609 transitions, 11511 flow [2024-06-27 23:33:56,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 609 transitions, 11187 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-27 23:33:56,096 INFO L231 Difference]: Finished difference. Result has 314 places, 577 transitions, 9641 flow [2024-06-27 23:33:56,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9641, PETRI_PLACES=314, PETRI_TRANSITIONS=577} [2024-06-27 23:33:56,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-27 23:33:56,097 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 577 transitions, 9641 flow [2024-06-27 23:33:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:56,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:33:56,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:33:56,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:33:56,097 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:33:56,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:33:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1989752988, now seen corresponding path program 9 times [2024-06-27 23:33:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:33:56,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642444454] [2024-06-27 23:33:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:33:56,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:33:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:33:57,758 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 23:33:57,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:33:57,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642444454] [2024-06-27 23:33:57,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642444454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:33:57,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:33:57,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:33:57,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958093891] [2024-06-27 23:33:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:33:57,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:33:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:33:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:33:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:33:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:33:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 577 transitions, 9641 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:33:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:33:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:33:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:33:59,374 INFO L124 PetriNetUnfolderBase]: 3964/5854 cut-off events. [2024-06-27 23:33:59,374 INFO L125 PetriNetUnfolderBase]: For 1114365/1114371 co-relation queries the response was YES. [2024-06-27 23:33:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 5854 events. 3964/5854 cut-off events. For 1114365/1114371 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29948 event pairs, 749 based on Foata normal form. 9/5859 useless extension candidates. Maximal degree in co-relation 74205. Up to 5078 conditions per place. [2024-06-27 23:33:59,454 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 390 selfloop transitions, 221 changer transitions 0/615 dead transitions. [2024-06-27 23:33:59,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 615 transitions, 11883 flow [2024-06-27 23:33:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:33:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:33:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:33:59,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 23:33:59,455 INFO L175 Difference]: Start difference. First operand has 314 places, 577 transitions, 9641 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:33:59,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 615 transitions, 11883 flow [2024-06-27 23:34:00,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 615 transitions, 11525 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-06-27 23:34:00,976 INFO L231 Difference]: Finished difference. Result has 318 places, 585 transitions, 10042 flow [2024-06-27 23:34:00,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10042, PETRI_PLACES=318, PETRI_TRANSITIONS=585} [2024-06-27 23:34:00,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-27 23:34:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 585 transitions, 10042 flow [2024-06-27 23:34:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:00,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:00,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:00,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:34:00,977 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:00,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744618, now seen corresponding path program 10 times [2024-06-27 23:34:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:00,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842851921] [2024-06-27 23:34:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:02,629 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 23:34:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842851921] [2024-06-27 23:34:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842851921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:34:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073834606] [2024-06-27 23:34:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:34:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:34:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:34:02,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:02,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 585 transitions, 10042 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:02,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:02,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:02,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:04,362 INFO L124 PetriNetUnfolderBase]: 3958/5846 cut-off events. [2024-06-27 23:34:04,362 INFO L125 PetriNetUnfolderBase]: For 1122297/1122303 co-relation queries the response was YES. [2024-06-27 23:34:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74498 conditions, 5846 events. 3958/5846 cut-off events. For 1122297/1122303 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29921 event pairs, 749 based on Foata normal form. 9/5851 useless extension candidates. Maximal degree in co-relation 74357. Up to 5099 conditions per place. [2024-06-27 23:34:04,450 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 214 changer transitions 0/613 dead transitions. [2024-06-27 23:34:04,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 613 transitions, 11678 flow [2024-06-27 23:34:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 23:34:04,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 23:34:04,451 INFO L175 Difference]: Start difference. First operand has 318 places, 585 transitions, 10042 flow. Second operand 10 states and 184 transitions. [2024-06-27 23:34:04,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 613 transitions, 11678 flow [2024-06-27 23:34:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 613 transitions, 11130 flow, removed 131 selfloop flow, removed 6 redundant places. [2024-06-27 23:34:06,534 INFO L231 Difference]: Finished difference. Result has 322 places, 585 transitions, 9931 flow [2024-06-27 23:34:06,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9494, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9931, PETRI_PLACES=322, PETRI_TRANSITIONS=585} [2024-06-27 23:34:06,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-27 23:34:06,534 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 585 transitions, 9931 flow [2024-06-27 23:34:06,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:06,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:06,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:06,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:34:06,535 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:06,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744370, now seen corresponding path program 10 times [2024-06-27 23:34:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:06,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472808005] [2024-06-27 23:34:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:07,914 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 23:34:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:07,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472808005] [2024-06-27 23:34:07,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472808005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:07,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414445257] [2024-06-27 23:34:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:07,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:07,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:08,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 585 transitions, 9931 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:08,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:08,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:08,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:09,637 INFO L124 PetriNetUnfolderBase]: 3968/5871 cut-off events. [2024-06-27 23:34:09,637 INFO L125 PetriNetUnfolderBase]: For 1140413/1140419 co-relation queries the response was YES. [2024-06-27 23:34:09,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75138 conditions, 5871 events. 3968/5871 cut-off events. For 1140413/1140419 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 30141 event pairs, 736 based on Foata normal form. 9/5875 useless extension candidates. Maximal degree in co-relation 74995. Up to 4469 conditions per place. [2024-06-27 23:34:09,717 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 327 selfloop transitions, 294 changer transitions 0/625 dead transitions. [2024-06-27 23:34:09,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 625 transitions, 12303 flow [2024-06-27 23:34:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 23:34:09,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:34:09,719 INFO L175 Difference]: Start difference. First operand has 322 places, 585 transitions, 9931 flow. Second operand 10 states and 190 transitions. [2024-06-27 23:34:09,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 625 transitions, 12303 flow [2024-06-27 23:34:11,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 625 transitions, 11864 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 23:34:11,340 INFO L231 Difference]: Finished difference. Result has 324 places, 594 transitions, 10665 flow [2024-06-27 23:34:11,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9492, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10665, PETRI_PLACES=324, PETRI_TRANSITIONS=594} [2024-06-27 23:34:11,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-27 23:34:11,341 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 594 transitions, 10665 flow [2024-06-27 23:34:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:11,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:11,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:11,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:34:11,341 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1344454752, now seen corresponding path program 2 times [2024-06-27 23:34:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711593036] [2024-06-27 23:34:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:12,494 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 23:34:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711593036] [2024-06-27 23:34:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711593036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:12,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:12,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:34:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270037750] [2024-06-27 23:34:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:34:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:34:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:34:12,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:34:12,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 594 transitions, 10665 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:12,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:12,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:34:12,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:14,133 INFO L124 PetriNetUnfolderBase]: 3804/5683 cut-off events. [2024-06-27 23:34:14,133 INFO L125 PetriNetUnfolderBase]: For 1164893/1164933 co-relation queries the response was YES. [2024-06-27 23:34:14,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74398 conditions, 5683 events. 3804/5683 cut-off events. For 1164893/1164933 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29720 event pairs, 799 based on Foata normal form. 30/5697 useless extension candidates. Maximal degree in co-relation 74253. Up to 5210 conditions per place. [2024-06-27 23:34:14,212 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 508 selfloop transitions, 31 changer transitions 0/603 dead transitions. [2024-06-27 23:34:14,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 603 transitions, 11931 flow [2024-06-27 23:34:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:34:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:34:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 23:34:14,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 23:34:14,213 INFO L175 Difference]: Start difference. First operand has 324 places, 594 transitions, 10665 flow. Second operand 6 states and 112 transitions. [2024-06-27 23:34:14,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 603 transitions, 11931 flow [2024-06-27 23:34:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 603 transitions, 11680 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 23:34:16,437 INFO L231 Difference]: Finished difference. Result has 325 places, 594 transitions, 10484 flow [2024-06-27 23:34:16,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10414, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10484, PETRI_PLACES=325, PETRI_TRANSITIONS=594} [2024-06-27 23:34:16,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 23:34:16,438 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 594 transitions, 10484 flow [2024-06-27 23:34:16,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:16,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:16,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:34:16,438 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:16,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1235773594, now seen corresponding path program 5 times [2024-06-27 23:34:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:16,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941439783] [2024-06-27 23:34:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:17,643 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 23:34:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941439783] [2024-06-27 23:34:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941439783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:17,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:17,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:17,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222741658] [2024-06-27 23:34:17,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:17,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:34:17,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 594 transitions, 10484 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:17,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:17,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:34:17,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:19,399 INFO L124 PetriNetUnfolderBase]: 3892/5825 cut-off events. [2024-06-27 23:34:19,399 INFO L125 PetriNetUnfolderBase]: For 1180131/1180139 co-relation queries the response was YES. [2024-06-27 23:34:19,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75759 conditions, 5825 events. 3892/5825 cut-off events. For 1180131/1180139 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30501 event pairs, 709 based on Foata normal form. 10/5833 useless extension candidates. Maximal degree in co-relation 75611. Up to 5113 conditions per place. [2024-06-27 23:34:19,485 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 459 selfloop transitions, 95 changer transitions 0/649 dead transitions. [2024-06-27 23:34:19,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 649 transitions, 12025 flow [2024-06-27 23:34:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:34:19,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:34:19,487 INFO L175 Difference]: Start difference. First operand has 325 places, 594 transitions, 10484 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:34:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 649 transitions, 12025 flow [2024-06-27 23:34:21,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 649 transitions, 11953 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 23:34:21,633 INFO L231 Difference]: Finished difference. Result has 333 places, 616 transitions, 10976 flow [2024-06-27 23:34:21,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10412, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10976, PETRI_PLACES=333, PETRI_TRANSITIONS=616} [2024-06-27 23:34:21,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 23:34:21,634 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 616 transitions, 10976 flow [2024-06-27 23:34:21,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:21,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:34:21,634 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:21,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash -383390606, now seen corresponding path program 11 times [2024-06-27 23:34:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266443965] [2024-06-27 23:34:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:22,658 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 23:34:22,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:22,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266443965] [2024-06-27 23:34:22,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266443965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:22,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:22,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:22,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534545296] [2024-06-27 23:34:22,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:22,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:22,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:22,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:22,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:22,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 616 transitions, 10976 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:22,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:22,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:22,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:24,416 INFO L124 PetriNetUnfolderBase]: 4103/6067 cut-off events. [2024-06-27 23:34:24,416 INFO L125 PetriNetUnfolderBase]: For 1244023/1244027 co-relation queries the response was YES. [2024-06-27 23:34:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79462 conditions, 6067 events. 4103/6067 cut-off events. For 1244023/1244027 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31463 event pairs, 744 based on Foata normal form. 7/6070 useless extension candidates. Maximal degree in co-relation 79311. Up to 5689 conditions per place. [2024-06-27 23:34:24,510 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 558 selfloop transitions, 119 changer transitions 0/681 dead transitions. [2024-06-27 23:34:24,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 681 transitions, 13905 flow [2024-06-27 23:34:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:34:24,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:34:24,511 INFO L175 Difference]: Start difference. First operand has 333 places, 616 transitions, 10976 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:34:24,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 681 transitions, 13905 flow [2024-06-27 23:34:26,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 681 transitions, 13683 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 23:34:26,176 INFO L231 Difference]: Finished difference. Result has 341 places, 640 transitions, 11717 flow [2024-06-27 23:34:26,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10754, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11717, PETRI_PLACES=341, PETRI_TRANSITIONS=640} [2024-06-27 23:34:26,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-27 23:34:26,177 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 640 transitions, 11717 flow [2024-06-27 23:34:26,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:26,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:26,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:26,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:34:26,177 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:26,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash -374130782, now seen corresponding path program 6 times [2024-06-27 23:34:26,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:26,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183535973] [2024-06-27 23:34:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:26,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:34:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183535973] [2024-06-27 23:34:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183535973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:27,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:27,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:27,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916449838] [2024-06-27 23:34:27,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:27,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:27,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:27,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:27,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:27,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:34:27,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 640 transitions, 11717 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:27,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:27,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:34:27,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:29,416 INFO L124 PetriNetUnfolderBase]: 3978/5960 cut-off events. [2024-06-27 23:34:29,416 INFO L125 PetriNetUnfolderBase]: For 1268646/1268656 co-relation queries the response was YES. [2024-06-27 23:34:29,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78871 conditions, 5960 events. 3978/5960 cut-off events. For 1268646/1268656 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31600 event pairs, 687 based on Foata normal form. 12/5970 useless extension candidates. Maximal degree in co-relation 78717. Up to 5183 conditions per place. [2024-06-27 23:34:29,504 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 467 selfloop transitions, 114 changer transitions 0/682 dead transitions. [2024-06-27 23:34:29,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 682 transitions, 13183 flow [2024-06-27 23:34:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:34:29,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:34:29,505 INFO L175 Difference]: Start difference. First operand has 341 places, 640 transitions, 11717 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:34:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 682 transitions, 13183 flow [2024-06-27 23:34:31,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 682 transitions, 12807 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-27 23:34:31,538 INFO L231 Difference]: Finished difference. Result has 346 places, 646 transitions, 11767 flow [2024-06-27 23:34:31,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11767, PETRI_PLACES=346, PETRI_TRANSITIONS=646} [2024-06-27 23:34:31,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 23:34:31,539 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 646 transitions, 11767 flow [2024-06-27 23:34:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:31,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:31,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:34:31,540 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:31,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 626118302, now seen corresponding path program 7 times [2024-06-27 23:34:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:31,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911296378] [2024-06-27 23:34:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:32,759 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 23:34:32,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:32,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911296378] [2024-06-27 23:34:32,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911296378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:32,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:32,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774603912] [2024-06-27 23:34:32,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:32,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:32,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:34:32,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 646 transitions, 11767 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:32,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:32,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:34:32,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:34,514 INFO L124 PetriNetUnfolderBase]: 4026/6041 cut-off events. [2024-06-27 23:34:34,514 INFO L125 PetriNetUnfolderBase]: For 1296278/1296288 co-relation queries the response was YES. [2024-06-27 23:34:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79590 conditions, 6041 events. 4026/6041 cut-off events. For 1296278/1296288 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32224 event pairs, 705 based on Foata normal form. 12/6051 useless extension candidates. Maximal degree in co-relation 79435. Up to 5284 conditions per place. [2024-06-27 23:34:34,606 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 492 selfloop transitions, 106 changer transitions 0/699 dead transitions. [2024-06-27 23:34:34,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 699 transitions, 13429 flow [2024-06-27 23:34:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:34:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:34:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 23:34:34,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 23:34:34,607 INFO L175 Difference]: Start difference. First operand has 346 places, 646 transitions, 11767 flow. Second operand 9 states and 185 transitions. [2024-06-27 23:34:34,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 699 transitions, 13429 flow [2024-06-27 23:34:37,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 699 transitions, 13083 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 23:34:37,167 INFO L231 Difference]: Finished difference. Result has 349 places, 665 transitions, 12062 flow [2024-06-27 23:34:37,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11437, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12062, PETRI_PLACES=349, PETRI_TRANSITIONS=665} [2024-06-27 23:34:37,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-27 23:34:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 665 transitions, 12062 flow [2024-06-27 23:34:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:37,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:37,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:34:37,169 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:37,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 629831792, now seen corresponding path program 8 times [2024-06-27 23:34:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:37,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177764841] [2024-06-27 23:34:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:38,467 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 23:34:38,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:38,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177764841] [2024-06-27 23:34:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177764841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165230979] [2024-06-27 23:34:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:38,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:34:38,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 665 transitions, 12062 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:38,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:38,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:34:38,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:40,480 INFO L124 PetriNetUnfolderBase]: 4050/6084 cut-off events. [2024-06-27 23:34:40,480 INFO L125 PetriNetUnfolderBase]: For 1324085/1324095 co-relation queries the response was YES. [2024-06-27 23:34:40,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80234 conditions, 6084 events. 4050/6084 cut-off events. For 1324085/1324095 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32502 event pairs, 744 based on Foata normal form. 12/6094 useless extension candidates. Maximal degree in co-relation 80078. Up to 5274 conditions per place. [2024-06-27 23:34:40,571 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 483 selfloop transitions, 124 changer transitions 0/708 dead transitions. [2024-06-27 23:34:40,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 708 transitions, 13612 flow [2024-06-27 23:34:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:34:40,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:34:40,572 INFO L175 Difference]: Start difference. First operand has 349 places, 665 transitions, 12062 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:34:40,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 708 transitions, 13612 flow [2024-06-27 23:34:43,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 708 transitions, 13377 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 23:34:43,187 INFO L231 Difference]: Finished difference. Result has 356 places, 674 transitions, 12324 flow [2024-06-27 23:34:43,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11827, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12324, PETRI_PLACES=356, PETRI_TRANSITIONS=674} [2024-06-27 23:34:43,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-27 23:34:43,188 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 674 transitions, 12324 flow [2024-06-27 23:34:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:34:43,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:43,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:34:43,189 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:43,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 629843138, now seen corresponding path program 12 times [2024-06-27 23:34:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:43,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772278580] [2024-06-27 23:34:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:44,252 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 23:34:44,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:44,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772278580] [2024-06-27 23:34:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772278580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:44,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235955312] [2024-06-27 23:34:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:44,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:44,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:44,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:44,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:44,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 674 transitions, 12324 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:44,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:44,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:44,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:46,137 INFO L124 PetriNetUnfolderBase]: 4310/6381 cut-off events. [2024-06-27 23:34:46,137 INFO L125 PetriNetUnfolderBase]: For 1394718/1394722 co-relation queries the response was YES. [2024-06-27 23:34:46,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84697 conditions, 6381 events. 4310/6381 cut-off events. For 1394718/1394722 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 33414 event pairs, 824 based on Foata normal form. 7/6384 useless extension candidates. Maximal degree in co-relation 84539. Up to 5961 conditions per place. [2024-06-27 23:34:46,235 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 611 selfloop transitions, 131 changer transitions 0/746 dead transitions. [2024-06-27 23:34:46,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 746 transitions, 15623 flow [2024-06-27 23:34:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:34:46,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:34:46,236 INFO L175 Difference]: Start difference. First operand has 356 places, 674 transitions, 12324 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:34:46,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 746 transitions, 15623 flow [2024-06-27 23:34:49,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 746 transitions, 15246 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 23:34:49,242 INFO L231 Difference]: Finished difference. Result has 359 places, 707 transitions, 13133 flow [2024-06-27 23:34:49,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11947, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13133, PETRI_PLACES=359, PETRI_TRANSITIONS=707} [2024-06-27 23:34:49,243 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 23:34:49,243 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 707 transitions, 13133 flow [2024-06-27 23:34:49,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:49,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:49,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:49,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:34:49,243 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:49,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1391335188, now seen corresponding path program 11 times [2024-06-27 23:34:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:49,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946585574] [2024-06-27 23:34:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:50,657 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 23:34:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946585574] [2024-06-27 23:34:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946585574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501812591] [2024-06-27 23:34:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:50,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:50,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 707 transitions, 13133 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:50,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:50,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:50,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:52,809 INFO L124 PetriNetUnfolderBase]: 4342/6438 cut-off events. [2024-06-27 23:34:52,809 INFO L125 PetriNetUnfolderBase]: For 1427921/1427923 co-relation queries the response was YES. [2024-06-27 23:34:52,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85627 conditions, 6438 events. 4342/6438 cut-off events. For 1427921/1427923 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 33884 event pairs, 840 based on Foata normal form. 5/6441 useless extension candidates. Maximal degree in co-relation 85467. Up to 6104 conditions per place. [2024-06-27 23:34:52,906 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 650 selfloop transitions, 99 changer transitions 0/753 dead transitions. [2024-06-27 23:34:52,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 753 transitions, 15647 flow [2024-06-27 23:34:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:34:52,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 23:34:52,907 INFO L175 Difference]: Start difference. First operand has 359 places, 707 transitions, 13133 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:34:52,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 753 transitions, 15647 flow [2024-06-27 23:34:55,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 753 transitions, 15356 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 23:34:55,314 INFO L231 Difference]: Finished difference. Result has 365 places, 715 transitions, 13257 flow [2024-06-27 23:34:55,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12842, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13257, PETRI_PLACES=365, PETRI_TRANSITIONS=715} [2024-06-27 23:34:55,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 23:34:55,315 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 715 transitions, 13257 flow [2024-06-27 23:34:55,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:55,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:34:55,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:34:55,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:34:55,316 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:34:55,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:34:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash 773935478, now seen corresponding path program 13 times [2024-06-27 23:34:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:34:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196172892] [2024-06-27 23:34:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:34:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:34:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:34:56,472 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 23:34:56,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:34:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196172892] [2024-06-27 23:34:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196172892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:34:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:34:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:34:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280332563] [2024-06-27 23:34:56,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:34:56,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:34:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:34:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:34:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:34:56,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:34:56,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 715 transitions, 13257 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:34:56,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:34:56,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:34:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:34:58,490 INFO L124 PetriNetUnfolderBase]: 4444/6561 cut-off events. [2024-06-27 23:34:58,490 INFO L125 PetriNetUnfolderBase]: For 1485021/1485023 co-relation queries the response was YES. [2024-06-27 23:34:58,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88151 conditions, 6561 events. 4444/6561 cut-off events. For 1485021/1485023 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34312 event pairs, 775 based on Foata normal form. 5/6560 useless extension candidates. Maximal degree in co-relation 87990. Up to 5884 conditions per place. [2024-06-27 23:34:58,586 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 574 selfloop transitions, 201 changer transitions 0/779 dead transitions. [2024-06-27 23:34:58,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 779 transitions, 16701 flow [2024-06-27 23:34:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:34:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:34:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:34:58,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 23:34:58,587 INFO L175 Difference]: Start difference. First operand has 365 places, 715 transitions, 13257 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:34:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 779 transitions, 16701 flow [2024-06-27 23:35:01,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 779 transitions, 16388 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-27 23:35:01,703 INFO L231 Difference]: Finished difference. Result has 369 places, 739 transitions, 14262 flow [2024-06-27 23:35:01,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12944, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14262, PETRI_PLACES=369, PETRI_TRANSITIONS=739} [2024-06-27 23:35:01,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-27 23:35:01,704 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 739 transitions, 14262 flow [2024-06-27 23:35:01,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:01,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:01,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:01,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:35:01,705 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:01,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash 773727902, now seen corresponding path program 9 times [2024-06-27 23:35:01,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:01,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524491572] [2024-06-27 23:35:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:01,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:03,097 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 23:35:03,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524491572] [2024-06-27 23:35:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524491572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:03,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924658312] [2024-06-27 23:35:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:03,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:03,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:35:03,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 739 transitions, 14262 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:03,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:03,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:35:03,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:05,205 INFO L124 PetriNetUnfolderBase]: 4306/6459 cut-off events. [2024-06-27 23:35:05,205 INFO L125 PetriNetUnfolderBase]: For 1517551/1517559 co-relation queries the response was YES. [2024-06-27 23:35:05,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87891 conditions, 6459 events. 4306/6459 cut-off events. For 1517551/1517559 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34722 event pairs, 744 based on Foata normal form. 10/6467 useless extension candidates. Maximal degree in co-relation 87727. Up to 5479 conditions per place. [2024-06-27 23:35:05,297 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 499 selfloop transitions, 162 changer transitions 0/779 dead transitions. [2024-06-27 23:35:05,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 779 transitions, 15900 flow [2024-06-27 23:35:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:35:05,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:35:05,299 INFO L175 Difference]: Start difference. First operand has 369 places, 739 transitions, 14262 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:35:05,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 779 transitions, 15900 flow [2024-06-27 23:35:08,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 779 transitions, 15587 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-27 23:35:08,722 INFO L231 Difference]: Finished difference. Result has 374 places, 745 transitions, 14488 flow [2024-06-27 23:35:08,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13949, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14488, PETRI_PLACES=374, PETRI_TRANSITIONS=745} [2024-06-27 23:35:08,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-27 23:35:08,722 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 745 transitions, 14488 flow [2024-06-27 23:35:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:08,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:08,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:35:08,723 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:08,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash 773733668, now seen corresponding path program 14 times [2024-06-27 23:35:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:08,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714494815] [2024-06-27 23:35:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:09,869 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 23:35:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714494815] [2024-06-27 23:35:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714494815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388741425] [2024-06-27 23:35:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:09,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:35:09,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 745 transitions, 14488 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:09,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:09,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:35:09,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:12,061 INFO L124 PetriNetUnfolderBase]: 4456/6586 cut-off events. [2024-06-27 23:35:12,061 INFO L125 PetriNetUnfolderBase]: For 1538376/1538378 co-relation queries the response was YES. [2024-06-27 23:35:12,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89758 conditions, 6586 events. 4456/6586 cut-off events. For 1538376/1538378 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34593 event pairs, 775 based on Foata normal form. 5/6585 useless extension candidates. Maximal degree in co-relation 89592. Up to 5906 conditions per place. [2024-06-27 23:35:12,165 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 601 selfloop transitions, 179 changer transitions 0/784 dead transitions. [2024-06-27 23:35:12,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 784 transitions, 17084 flow [2024-06-27 23:35:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:35:12,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 23:35:12,167 INFO L175 Difference]: Start difference. First operand has 374 places, 745 transitions, 14488 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:35:12,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 784 transitions, 17084 flow [2024-06-27 23:35:15,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 784 transitions, 16523 flow, removed 123 selfloop flow, removed 8 redundant places. [2024-06-27 23:35:15,691 INFO L231 Difference]: Finished difference. Result has 376 places, 745 transitions, 14302 flow [2024-06-27 23:35:15,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13927, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14302, PETRI_PLACES=376, PETRI_TRANSITIONS=745} [2024-06-27 23:35:15,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-27 23:35:15,691 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 745 transitions, 14302 flow [2024-06-27 23:35:15,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:15,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:15,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:35:15,692 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:15,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:15,692 INFO L85 PathProgramCache]: Analyzing trace with hash -295198054, now seen corresponding path program 10 times [2024-06-27 23:35:15,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:15,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110744830] [2024-06-27 23:35:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:15,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:17,050 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 23:35:17,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110744830] [2024-06-27 23:35:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110744830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773112260] [2024-06-27 23:35:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:17,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:35:17,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 745 transitions, 14302 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:17,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:17,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:35:17,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:19,158 INFO L124 PetriNetUnfolderBase]: 4357/6527 cut-off events. [2024-06-27 23:35:19,158 INFO L125 PetriNetUnfolderBase]: For 1558829/1558837 co-relation queries the response was YES. [2024-06-27 23:35:19,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89150 conditions, 6527 events. 4357/6527 cut-off events. For 1558829/1558837 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35054 event pairs, 709 based on Foata normal form. 10/6535 useless extension candidates. Maximal degree in co-relation 88983. Up to 5625 conditions per place. [2024-06-27 23:35:19,266 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 547 selfloop transitions, 124 changer transitions 0/789 dead transitions. [2024-06-27 23:35:19,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 789 transitions, 16024 flow [2024-06-27 23:35:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:35:19,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:35:19,268 INFO L175 Difference]: Start difference. First operand has 376 places, 745 transitions, 14302 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:35:19,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 789 transitions, 16024 flow [2024-06-27 23:35:22,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 789 transitions, 15603 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:35:22,208 INFO L231 Difference]: Finished difference. Result has 379 places, 757 transitions, 14441 flow [2024-06-27 23:35:22,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13881, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14441, PETRI_PLACES=379, PETRI_TRANSITIONS=757} [2024-06-27 23:35:22,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 23:35:22,209 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 757 transitions, 14441 flow [2024-06-27 23:35:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:22,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:35:22,209 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:22,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash -295197868, now seen corresponding path program 15 times [2024-06-27 23:35:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439776833] [2024-06-27 23:35:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:23,315 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 23:35:23,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439776833] [2024-06-27 23:35:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439776833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:23,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:23,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040437752] [2024-06-27 23:35:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:23,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:23,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:35:23,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 757 transitions, 14441 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:23,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:23,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:35:23,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:25,796 INFO L124 PetriNetUnfolderBase]: 4636/6867 cut-off events. [2024-06-27 23:35:25,796 INFO L125 PetriNetUnfolderBase]: For 1650573/1650579 co-relation queries the response was YES. [2024-06-27 23:35:25,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94170 conditions, 6867 events. 4636/6867 cut-off events. For 1650573/1650579 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36493 event pairs, 774 based on Foata normal form. 9/6874 useless extension candidates. Maximal degree in co-relation 94002. Up to 6401 conditions per place. [2024-06-27 23:35:25,896 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 687 selfloop transitions, 144 changer transitions 0/835 dead transitions. [2024-06-27 23:35:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 835 transitions, 18276 flow [2024-06-27 23:35:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:35:25,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:35:25,898 INFO L175 Difference]: Start difference. First operand has 379 places, 757 transitions, 14441 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:35:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 835 transitions, 18276 flow [2024-06-27 23:35:29,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 835 transitions, 17885 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-27 23:35:29,538 INFO L231 Difference]: Finished difference. Result has 381 places, 798 transitions, 15597 flow [2024-06-27 23:35:29,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14050, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15597, PETRI_PLACES=381, PETRI_TRANSITIONS=798} [2024-06-27 23:35:29,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 23:35:29,539 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 798 transitions, 15597 flow [2024-06-27 23:35:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:29,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:29,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:29,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:35:29,539 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:29,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -290556238, now seen corresponding path program 16 times [2024-06-27 23:35:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:29,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164018656] [2024-06-27 23:35:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:30,721 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 23:35:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164018656] [2024-06-27 23:35:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164018656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547221075] [2024-06-27 23:35:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:30,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:35:30,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 798 transitions, 15597 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:30,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:30,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:35:30,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:33,113 INFO L124 PetriNetUnfolderBase]: 4782/7072 cut-off events. [2024-06-27 23:35:33,114 INFO L125 PetriNetUnfolderBase]: For 1729364/1729370 co-relation queries the response was YES. [2024-06-27 23:35:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98118 conditions, 7072 events. 4782/7072 cut-off events. For 1729364/1729370 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37709 event pairs, 769 based on Foata normal form. 9/7079 useless extension candidates. Maximal degree in co-relation 97948. Up to 6391 conditions per place. [2024-06-27 23:35:33,241 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 682 selfloop transitions, 186 changer transitions 0/872 dead transitions. [2024-06-27 23:35:33,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 872 transitions, 19565 flow [2024-06-27 23:35:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:35:33,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:35:33,242 INFO L175 Difference]: Start difference. First operand has 381 places, 798 transitions, 15597 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:35:33,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 872 transitions, 19565 flow [2024-06-27 23:35:36,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 872 transitions, 19263 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 23:35:36,701 INFO L231 Difference]: Finished difference. Result has 388 places, 831 transitions, 16656 flow [2024-06-27 23:35:36,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15295, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16656, PETRI_PLACES=388, PETRI_TRANSITIONS=831} [2024-06-27 23:35:36,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 23:35:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 831 transitions, 16656 flow [2024-06-27 23:35:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:36,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:36,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:35:36,702 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:36,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -290556424, now seen corresponding path program 11 times [2024-06-27 23:35:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:36,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886234251] [2024-06-27 23:35:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:38,028 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 23:35:38,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:38,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886234251] [2024-06-27 23:35:38,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886234251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:38,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:38,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:38,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554414069] [2024-06-27 23:35:38,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:38,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:38,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:38,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:38,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:38,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:35:38,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 831 transitions, 16656 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:38,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:38,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:35:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:40,451 INFO L124 PetriNetUnfolderBase]: 4668/6982 cut-off events. [2024-06-27 23:35:40,451 INFO L125 PetriNetUnfolderBase]: For 1763975/1763983 co-relation queries the response was YES. [2024-06-27 23:35:40,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97731 conditions, 6982 events. 4668/6982 cut-off events. For 1763975/1763983 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37967 event pairs, 718 based on Foata normal form. 10/6990 useless extension candidates. Maximal degree in co-relation 97559. Up to 5936 conditions per place. [2024-06-27 23:35:40,572 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 590 selfloop transitions, 144 changer transitions 0/872 dead transitions. [2024-06-27 23:35:40,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 872 transitions, 18472 flow [2024-06-27 23:35:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:35:40,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 23:35:40,574 INFO L175 Difference]: Start difference. First operand has 388 places, 831 transitions, 16656 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:35:40,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 872 transitions, 18472 flow [2024-06-27 23:35:44,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 872 transitions, 18106 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-27 23:35:44,490 INFO L231 Difference]: Finished difference. Result has 393 places, 840 transitions, 16844 flow [2024-06-27 23:35:44,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16290, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16844, PETRI_PLACES=393, PETRI_TRANSITIONS=840} [2024-06-27 23:35:44,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 23:35:44,490 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 840 transitions, 16844 flow [2024-06-27 23:35:44,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:44,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:44,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:44,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:35:44,491 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:44,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -290549728, now seen corresponding path program 17 times [2024-06-27 23:35:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:44,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078977073] [2024-06-27 23:35:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:44,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:45,676 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 23:35:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078977073] [2024-06-27 23:35:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078977073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:45,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:45,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:35:45,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796332391] [2024-06-27 23:35:45,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:45,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:35:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:35:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:35:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:35:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 840 transitions, 16844 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:35:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:48,293 INFO L124 PetriNetUnfolderBase]: 4801/7110 cut-off events. [2024-06-27 23:35:48,294 INFO L125 PetriNetUnfolderBase]: For 1788829/1788835 co-relation queries the response was YES. [2024-06-27 23:35:48,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99269 conditions, 7110 events. 4801/7110 cut-off events. For 1788829/1788835 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38095 event pairs, 769 based on Foata normal form. 9/7117 useless extension candidates. Maximal degree in co-relation 99095. Up to 6423 conditions per place. [2024-06-27 23:35:48,407 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 671 selfloop transitions, 204 changer transitions 0/879 dead transitions. [2024-06-27 23:35:48,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 879 transitions, 19608 flow [2024-06-27 23:35:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:35:48,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-27 23:35:48,408 INFO L175 Difference]: Start difference. First operand has 393 places, 840 transitions, 16844 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:35:48,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 879 transitions, 19608 flow [2024-06-27 23:35:52,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 879 transitions, 19172 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-27 23:35:52,261 INFO L231 Difference]: Finished difference. Result has 395 places, 843 transitions, 16971 flow [2024-06-27 23:35:52,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16408, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16971, PETRI_PLACES=395, PETRI_TRANSITIONS=843} [2024-06-27 23:35:52,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 23:35:52,262 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 843 transitions, 16971 flow [2024-06-27 23:35:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:35:52,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:35:52,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:35:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:35:52,262 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:35:52,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:35:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 327200592, now seen corresponding path program 12 times [2024-06-27 23:35:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:35:52,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41815369] [2024-06-27 23:35:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:35:52,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:35:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:35:53,697 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 23:35:53,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:35:53,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41815369] [2024-06-27 23:35:53,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41815369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:35:53,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:35:53,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:35:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387733265] [2024-06-27 23:35:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:35:53,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:35:53,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:35:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:35:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:35:53,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:35:53,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 843 transitions, 16971 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:35:53,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:35:53,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:35:53,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:35:56,274 INFO L124 PetriNetUnfolderBase]: 4847/7181 cut-off events. [2024-06-27 23:35:56,274 INFO L125 PetriNetUnfolderBase]: For 1828661/1828665 co-relation queries the response was YES. [2024-06-27 23:35:56,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100385 conditions, 7181 events. 4847/7181 cut-off events. For 1828661/1828665 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38594 event pairs, 825 based on Foata normal form. 7/7186 useless extension candidates. Maximal degree in co-relation 100210. Up to 6816 conditions per place. [2024-06-27 23:35:56,405 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 787 selfloop transitions, 100 changer transitions 0/891 dead transitions. [2024-06-27 23:35:56,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 891 transitions, 19879 flow [2024-06-27 23:35:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:35:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:35:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:35:56,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 23:35:56,406 INFO L175 Difference]: Start difference. First operand has 395 places, 843 transitions, 16971 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:35:56,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 891 transitions, 19879 flow [2024-06-27 23:36:00,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 891 transitions, 19434 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 23:36:00,605 INFO L231 Difference]: Finished difference. Result has 399 places, 855 transitions, 17011 flow [2024-06-27 23:36:00,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16526, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17011, PETRI_PLACES=399, PETRI_TRANSITIONS=855} [2024-06-27 23:36:00,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 23:36:00,606 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 855 transitions, 17011 flow [2024-06-27 23:36:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:36:00,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:00,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:36:00,606 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:00,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -118066534, now seen corresponding path program 12 times [2024-06-27 23:36:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503117760] [2024-06-27 23:36:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:02,210 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 23:36:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503117760] [2024-06-27 23:36:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503117760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:02,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:02,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358937779] [2024-06-27 23:36:02,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:02,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:02,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:36:02,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 855 transitions, 17011 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:36:02,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:02,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:36:02,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:04,900 INFO L124 PetriNetUnfolderBase]: 4720/7054 cut-off events. [2024-06-27 23:36:04,901 INFO L125 PetriNetUnfolderBase]: For 1837671/1837677 co-relation queries the response was YES. [2024-06-27 23:36:04,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98593 conditions, 7054 events. 4720/7054 cut-off events. For 1837671/1837677 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38312 event pairs, 724 based on Foata normal form. 8/7060 useless extension candidates. Maximal degree in co-relation 98417. Up to 5791 conditions per place. [2024-06-27 23:36:05,017 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 535 selfloop transitions, 214 changer transitions 0/890 dead transitions. [2024-06-27 23:36:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 890 transitions, 18647 flow [2024-06-27 23:36:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:36:05,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:36:05,019 INFO L175 Difference]: Start difference. First operand has 399 places, 855 transitions, 17011 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:36:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 890 transitions, 18647 flow [2024-06-27 23:36:09,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 890 transitions, 18317 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 23:36:09,575 INFO L231 Difference]: Finished difference. Result has 403 places, 858 transitions, 17145 flow [2024-06-27 23:36:09,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16681, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17145, PETRI_PLACES=403, PETRI_TRANSITIONS=858} [2024-06-27 23:36:09,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-27 23:36:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 858 transitions, 17145 flow [2024-06-27 23:36:09,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:36:09,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:09,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:36:09,576 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:09,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -118066348, now seen corresponding path program 18 times [2024-06-27 23:36:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699609895] [2024-06-27 23:36:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:11,078 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 23:36:11,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:11,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699609895] [2024-06-27 23:36:11,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699609895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:11,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:11,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73072101] [2024-06-27 23:36:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:11,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:11,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:36:11,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 858 transitions, 17145 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:11,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:11,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:36:11,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:13,562 INFO L124 PetriNetUnfolderBase]: 4925/7296 cut-off events. [2024-06-27 23:36:13,562 INFO L125 PetriNetUnfolderBase]: For 1897972/1897978 co-relation queries the response was YES. [2024-06-27 23:36:13,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101722 conditions, 7296 events. 4925/7296 cut-off events. For 1897972/1897978 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39238 event pairs, 780 based on Foata normal form. 9/7303 useless extension candidates. Maximal degree in co-relation 101545. Up to 6051 conditions per place. [2024-06-27 23:36:13,698 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 622 selfloop transitions, 290 changer transitions 0/916 dead transitions. [2024-06-27 23:36:13,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 916 transitions, 20701 flow [2024-06-27 23:36:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:36:13,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:36:13,699 INFO L175 Difference]: Start difference. First operand has 403 places, 858 transitions, 17145 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:36:13,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 916 transitions, 20701 flow [2024-06-27 23:36:17,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 916 transitions, 19977 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 23:36:17,489 INFO L231 Difference]: Finished difference. Result has 405 places, 876 transitions, 17493 flow [2024-06-27 23:36:17,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16421, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17493, PETRI_PLACES=405, PETRI_TRANSITIONS=876} [2024-06-27 23:36:17,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 23:36:17,490 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 876 transitions, 17493 flow [2024-06-27 23:36:17,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:36:17,490 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:17,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash -118059590, now seen corresponding path program 13 times [2024-06-27 23:36:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:17,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062963584] [2024-06-27 23:36:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:19,029 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 23:36:19,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062963584] [2024-06-27 23:36:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062963584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218191730] [2024-06-27 23:36:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:36:19,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 876 transitions, 17493 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:19,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:19,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:36:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:21,436 INFO L124 PetriNetUnfolderBase]: 4957/7339 cut-off events. [2024-06-27 23:36:21,436 INFO L125 PetriNetUnfolderBase]: For 1939723/1939727 co-relation queries the response was YES. [2024-06-27 23:36:21,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103092 conditions, 7339 events. 4957/7339 cut-off events. For 1939723/1939727 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39526 event pairs, 808 based on Foata normal form. 7/7344 useless extension candidates. Maximal degree in co-relation 102913. Up to 6777 conditions per place. [2024-06-27 23:36:21,564 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 779 selfloop transitions, 137 changer transitions 0/920 dead transitions. [2024-06-27 23:36:21,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 920 transitions, 20447 flow [2024-06-27 23:36:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:36:21,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 23:36:21,566 INFO L175 Difference]: Start difference. First operand has 405 places, 876 transitions, 17493 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:36:21,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 920 transitions, 20447 flow [2024-06-27 23:36:25,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 920 transitions, 19082 flow, removed 149 selfloop flow, removed 10 redundant places. [2024-06-27 23:36:25,413 INFO L231 Difference]: Finished difference. Result has 405 places, 884 transitions, 16634 flow [2024-06-27 23:36:25,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16634, PETRI_PLACES=405, PETRI_TRANSITIONS=884} [2024-06-27 23:36:25,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 23:36:25,414 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 884 transitions, 16634 flow [2024-06-27 23:36:25,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:25,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:25,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:25,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:36:25,415 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:25,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:25,415 INFO L85 PathProgramCache]: Analyzing trace with hash -118059838, now seen corresponding path program 19 times [2024-06-27 23:36:25,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617159291] [2024-06-27 23:36:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:25,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:26,778 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 23:36:26,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617159291] [2024-06-27 23:36:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617159291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:26,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:26,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:26,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267745486] [2024-06-27 23:36:26,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:26,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:36:26,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 884 transitions, 16634 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:26,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:26,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:36:26,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:29,457 INFO L124 PetriNetUnfolderBase]: 4975/7368 cut-off events. [2024-06-27 23:36:29,457 INFO L125 PetriNetUnfolderBase]: For 1952237/1952243 co-relation queries the response was YES. [2024-06-27 23:36:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101011 conditions, 7368 events. 4975/7368 cut-off events. For 1952237/1952243 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39696 event pairs, 780 based on Foata normal form. 9/7375 useless extension candidates. Maximal degree in co-relation 100833. Up to 6116 conditions per place. [2024-06-27 23:36:29,566 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 628 selfloop transitions, 295 changer transitions 0/927 dead transitions. [2024-06-27 23:36:29,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 927 transitions, 19819 flow [2024-06-27 23:36:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:36:29,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 23:36:29,567 INFO L175 Difference]: Start difference. First operand has 405 places, 884 transitions, 16634 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:36:29,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 927 transitions, 19819 flow [2024-06-27 23:36:33,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 927 transitions, 19395 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-27 23:36:33,020 INFO L231 Difference]: Finished difference. Result has 406 places, 889 transitions, 17027 flow [2024-06-27 23:36:33,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16210, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17027, PETRI_PLACES=406, PETRI_TRANSITIONS=889} [2024-06-27 23:36:33,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-27 23:36:33,021 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 889 transitions, 17027 flow [2024-06-27 23:36:33,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:33,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:33,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:36:33,021 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:33,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -117828950, now seen corresponding path program 14 times [2024-06-27 23:36:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253742503] [2024-06-27 23:36:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:33,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:34,549 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 23:36:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253742503] [2024-06-27 23:36:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253742503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:34,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:34,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425976959] [2024-06-27 23:36:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:34,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:34,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:36:34,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 889 transitions, 17027 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:34,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:34,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:36:34,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:37,071 INFO L124 PetriNetUnfolderBase]: 5007/7411 cut-off events. [2024-06-27 23:36:37,071 INFO L125 PetriNetUnfolderBase]: For 1996655/1996659 co-relation queries the response was YES. [2024-06-27 23:36:37,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102377 conditions, 7411 events. 5007/7411 cut-off events. For 1996655/1996659 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39888 event pairs, 808 based on Foata normal form. 7/7416 useless extension candidates. Maximal degree in co-relation 102198. Up to 6849 conditions per place. [2024-06-27 23:36:37,209 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 772 selfloop transitions, 156 changer transitions 0/932 dead transitions. [2024-06-27 23:36:37,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 932 transitions, 19825 flow [2024-06-27 23:36:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:36:37,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 23:36:37,212 INFO L175 Difference]: Start difference. First operand has 406 places, 889 transitions, 17027 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:36:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 932 transitions, 19825 flow [2024-06-27 23:36:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 932 transitions, 19121 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-27 23:36:40,878 INFO L231 Difference]: Finished difference. Result has 409 places, 897 transitions, 16875 flow [2024-06-27 23:36:40,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16323, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16875, PETRI_PLACES=409, PETRI_TRANSITIONS=897} [2024-06-27 23:36:40,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 23:36:40,879 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 897 transitions, 16875 flow [2024-06-27 23:36:40,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:40,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:40,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:40,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:36:40,879 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:40,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -117820270, now seen corresponding path program 6 times [2024-06-27 23:36:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976581034] [2024-06-27 23:36:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:42,480 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 23:36:42,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:42,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976581034] [2024-06-27 23:36:42,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976581034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:42,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:42,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:42,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463930325] [2024-06-27 23:36:42,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:42,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:42,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:36:42,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 897 transitions, 16875 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:36:42,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:42,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:36:42,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:45,005 INFO L124 PetriNetUnfolderBase]: 4824/7216 cut-off events. [2024-06-27 23:36:45,006 INFO L125 PetriNetUnfolderBase]: For 2031461/2031495 co-relation queries the response was YES. [2024-06-27 23:36:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99242 conditions, 7216 events. 4824/7216 cut-off events. For 2031461/2031495 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39782 event pairs, 911 based on Foata normal form. 29/7225 useless extension candidates. Maximal degree in co-relation 99062. Up to 6489 conditions per place. [2024-06-27 23:36:45,132 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 799 selfloop transitions, 63 changer transitions 0/935 dead transitions. [2024-06-27 23:36:45,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 935 transitions, 19151 flow [2024-06-27 23:36:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:36:45,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:36:45,133 INFO L175 Difference]: Start difference. First operand has 409 places, 897 transitions, 16875 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:36:45,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 935 transitions, 19151 flow [2024-06-27 23:36:49,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 935 transitions, 18611 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-27 23:36:49,927 INFO L231 Difference]: Finished difference. Result has 411 places, 900 transitions, 16497 flow [2024-06-27 23:36:49,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16335, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16497, PETRI_PLACES=411, PETRI_TRANSITIONS=900} [2024-06-27 23:36:49,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-27 23:36:49,928 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 900 transitions, 16497 flow [2024-06-27 23:36:49,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:36:49,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:49,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:36:49,928 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:49,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash -117829198, now seen corresponding path program 20 times [2024-06-27 23:36:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:49,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544232563] [2024-06-27 23:36:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:51,167 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 23:36:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544232563] [2024-06-27 23:36:51,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544232563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:51,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:51,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:36:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346361657] [2024-06-27 23:36:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:51,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:36:51,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:36:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:36:51,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:36:51,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 900 transitions, 16497 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:51,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:36:51,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:36:51,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:36:53,912 INFO L124 PetriNetUnfolderBase]: 5013/7427 cut-off events. [2024-06-27 23:36:53,913 INFO L125 PetriNetUnfolderBase]: For 2009980/2009986 co-relation queries the response was YES. [2024-06-27 23:36:53,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100491 conditions, 7427 events. 5013/7427 cut-off events. For 2009980/2009986 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40043 event pairs, 777 based on Foata normal form. 9/7434 useless extension candidates. Maximal degree in co-relation 100310. Up to 6178 conditions per place. [2024-06-27 23:36:54,037 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 569 selfloop transitions, 363 changer transitions 0/936 dead transitions. [2024-06-27 23:36:54,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 936 transitions, 19113 flow [2024-06-27 23:36:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:36:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:36:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:36:54,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:36:54,038 INFO L175 Difference]: Start difference. First operand has 411 places, 900 transitions, 16497 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:36:54,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 936 transitions, 19113 flow [2024-06-27 23:36:57,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 936 transitions, 18869 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 23:36:57,986 INFO L231 Difference]: Finished difference. Result has 412 places, 901 transitions, 17003 flow [2024-06-27 23:36:57,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16253, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17003, PETRI_PLACES=412, PETRI_TRANSITIONS=901} [2024-06-27 23:36:57,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-27 23:36:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 901 transitions, 17003 flow [2024-06-27 23:36:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 23:36:57,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:36:57,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:36:57,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:36:57,986 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:36:57,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:36:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash -117820580, now seen corresponding path program 15 times [2024-06-27 23:36:57,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:36:57,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662039050] [2024-06-27 23:36:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:36:57,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:36:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:36:59,920 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 23:36:59,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:36:59,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662039050] [2024-06-27 23:36:59,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662039050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:36:59,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:36:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:36:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165156792] [2024-06-27 23:36:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:36:59,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:36:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:36:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:36:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:37:00,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:37:00,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 901 transitions, 17003 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:00,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:00,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:37:00,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:02,592 INFO L124 PetriNetUnfolderBase]: 5021/7435 cut-off events. [2024-06-27 23:37:02,593 INFO L125 PetriNetUnfolderBase]: For 2033713/2033717 co-relation queries the response was YES. [2024-06-27 23:37:02,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101535 conditions, 7435 events. 5021/7435 cut-off events. For 2033713/2033717 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40159 event pairs, 805 based on Foata normal form. 7/7440 useless extension candidates. Maximal degree in co-relation 101353. Up to 6754 conditions per place. [2024-06-27 23:37:02,729 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 740 selfloop transitions, 200 changer transitions 0/944 dead transitions. [2024-06-27 23:37:02,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 944 transitions, 19677 flow [2024-06-27 23:37:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:37:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:37:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 23:37:02,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-27 23:37:02,731 INFO L175 Difference]: Start difference. First operand has 412 places, 901 transitions, 17003 flow. Second operand 11 states and 210 transitions. [2024-06-27 23:37:02,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 944 transitions, 19677 flow [2024-06-27 23:37:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 944 transitions, 18708 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-27 23:37:08,088 INFO L231 Difference]: Finished difference. Result has 414 places, 905 transitions, 16494 flow [2024-06-27 23:37:08,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16034, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16494, PETRI_PLACES=414, PETRI_TRANSITIONS=905} [2024-06-27 23:37:08,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-27 23:37:08,089 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 905 transitions, 16494 flow [2024-06-27 23:37:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:08,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:08,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:08,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:37:08,090 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:08,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash -563758964, now seen corresponding path program 3 times [2024-06-27 23:37:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369376861] [2024-06-27 23:37:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:09,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:09,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369376861] [2024-06-27 23:37:09,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369376861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:09,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:09,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:37:09,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583562183] [2024-06-27 23:37:09,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:37:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:37:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:37:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 23:37:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 905 transitions, 16494 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:09,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:09,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 23:37:09,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:11,681 INFO L124 PetriNetUnfolderBase]: 4823/7216 cut-off events. [2024-06-27 23:37:11,681 INFO L125 PetriNetUnfolderBase]: For 2069747/2069781 co-relation queries the response was YES. [2024-06-27 23:37:11,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98698 conditions, 7216 events. 4823/7216 cut-off events. For 2069747/2069781 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39743 event pairs, 909 based on Foata normal form. 24/7220 useless extension candidates. Maximal degree in co-relation 98516. Up to 6609 conditions per place. [2024-06-27 23:37:11,885 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 817 selfloop transitions, 31 changer transitions 0/922 dead transitions. [2024-06-27 23:37:11,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 922 transitions, 18248 flow [2024-06-27 23:37:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:37:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:37:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 23:37:11,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 23:37:11,886 INFO L175 Difference]: Start difference. First operand has 414 places, 905 transitions, 16494 flow. Second operand 7 states and 133 transitions. [2024-06-27 23:37:11,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 922 transitions, 18248 flow [2024-06-27 23:37:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 922 transitions, 17345 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-06-27 23:37:14,687 INFO L231 Difference]: Finished difference. Result has 409 places, 905 transitions, 15663 flow [2024-06-27 23:37:14,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15591, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15663, PETRI_PLACES=409, PETRI_TRANSITIONS=905} [2024-06-27 23:37:14,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 23:37:14,688 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 905 transitions, 15663 flow [2024-06-27 23:37:14,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:14,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:14,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:14,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:37:14,688 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:14,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1919208140, now seen corresponding path program 1 times [2024-06-27 23:37:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128211749] [2024-06-27 23:37:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:15,711 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 23:37:15,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:15,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128211749] [2024-06-27 23:37:15,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128211749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:15,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:15,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:37:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863371329] [2024-06-27 23:37:15,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:15,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:37:15,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:37:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:37:15,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:37:15,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 905 transitions, 15663 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:15,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:15,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:37:15,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:18,122 INFO L124 PetriNetUnfolderBase]: 4546/6928 cut-off events. [2024-06-27 23:37:18,122 INFO L125 PetriNetUnfolderBase]: For 1871218/1871269 co-relation queries the response was YES. [2024-06-27 23:37:18,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89862 conditions, 6928 events. 4546/6928 cut-off events. For 1871218/1871269 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39084 event pairs, 996 based on Foata normal form. 31/6934 useless extension candidates. Maximal degree in co-relation 89681. Up to 6211 conditions per place. [2024-06-27 23:37:18,234 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 824 selfloop transitions, 21 changer transitions 0/920 dead transitions. [2024-06-27 23:37:18,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 920 transitions, 17646 flow [2024-06-27 23:37:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:37:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:37:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 23:37:18,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-27 23:37:18,235 INFO L175 Difference]: Start difference. First operand has 409 places, 905 transitions, 15663 flow. Second operand 6 states and 121 transitions. [2024-06-27 23:37:18,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 920 transitions, 17646 flow [2024-06-27 23:37:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 920 transitions, 17560 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:37:23,115 INFO L231 Difference]: Finished difference. Result has 408 places, 908 transitions, 15668 flow [2024-06-27 23:37:23,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15577, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15668, PETRI_PLACES=408, PETRI_TRANSITIONS=908} [2024-06-27 23:37:23,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-27 23:37:23,116 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 908 transitions, 15668 flow [2024-06-27 23:37:23,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:23,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:23,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:37:23,116 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1345081076, now seen corresponding path program 2 times [2024-06-27 23:37:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877771016] [2024-06-27 23:37:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:24,177 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 23:37:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:24,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877771016] [2024-06-27 23:37:24,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877771016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:24,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:24,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:37:24,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31021381] [2024-06-27 23:37:24,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:24,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:37:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:24,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:37:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:37:24,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 23:37:24,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 908 transitions, 15668 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:24,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:24,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 23:37:24,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:26,609 INFO L124 PetriNetUnfolderBase]: 4511/6874 cut-off events. [2024-06-27 23:37:26,609 INFO L125 PetriNetUnfolderBase]: For 1887004/1887055 co-relation queries the response was YES. [2024-06-27 23:37:26,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89453 conditions, 6874 events. 4511/6874 cut-off events. For 1887004/1887055 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38674 event pairs, 994 based on Foata normal form. 30/6879 useless extension candidates. Maximal degree in co-relation 89271. Up to 6192 conditions per place. [2024-06-27 23:37:26,716 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 828 selfloop transitions, 13 changer transitions 0/916 dead transitions. [2024-06-27 23:37:26,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 916 transitions, 17376 flow [2024-06-27 23:37:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:37:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:37:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 23:37:26,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-27 23:37:26,717 INFO L175 Difference]: Start difference. First operand has 408 places, 908 transitions, 15668 flow. Second operand 6 states and 113 transitions. [2024-06-27 23:37:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 916 transitions, 17376 flow [2024-06-27 23:37:30,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 916 transitions, 17343 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:37:30,678 INFO L231 Difference]: Finished difference. Result has 411 places, 908 transitions, 15667 flow [2024-06-27 23:37:30,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15635, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=895, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15667, PETRI_PLACES=411, PETRI_TRANSITIONS=908} [2024-06-27 23:37:30,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-27 23:37:30,679 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 908 transitions, 15667 flow [2024-06-27 23:37:30,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:30,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:30,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:37:30,680 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:30,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash -646532328, now seen corresponding path program 1 times [2024-06-27 23:37:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:30,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539986941] [2024-06-27 23:37:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:30,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539986941] [2024-06-27 23:37:32,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539986941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:32,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:32,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:37:32,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414694027] [2024-06-27 23:37:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:32,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:37:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:37:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:37:32,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:37:32,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 908 transitions, 15667 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:32,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:32,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:37:32,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:35,396 INFO L124 PetriNetUnfolderBase]: 5027/7445 cut-off events. [2024-06-27 23:37:35,397 INFO L125 PetriNetUnfolderBase]: For 2168182/2168186 co-relation queries the response was YES. [2024-06-27 23:37:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99480 conditions, 7445 events. 5027/7445 cut-off events. For 2168182/2168186 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40212 event pairs, 711 based on Foata normal form. 3/7442 useless extension candidates. Maximal degree in co-relation 99297. Up to 6873 conditions per place. [2024-06-27 23:37:35,517 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 820 selfloop transitions, 133 changer transitions 0/957 dead transitions. [2024-06-27 23:37:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 957 transitions, 19223 flow [2024-06-27 23:37:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:37:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:37:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 23:37:35,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-27 23:37:35,518 INFO L175 Difference]: Start difference. First operand has 411 places, 908 transitions, 15667 flow. Second operand 11 states and 208 transitions. [2024-06-27 23:37:35,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 957 transitions, 19223 flow [2024-06-27 23:37:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 957 transitions, 19176 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 23:37:40,826 INFO L231 Difference]: Finished difference. Result has 418 places, 922 transitions, 16387 flow [2024-06-27 23:37:40,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15620, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16387, PETRI_PLACES=418, PETRI_TRANSITIONS=922} [2024-06-27 23:37:40,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-27 23:37:40,827 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 922 transitions, 16387 flow [2024-06-27 23:37:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:40,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:40,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:40,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:37:40,827 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:40,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1960090226, now seen corresponding path program 2 times [2024-06-27 23:37:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:40,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137959982] [2024-06-27 23:37:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:40,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:42,551 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 23:37:42,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:42,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137959982] [2024-06-27 23:37:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137959982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:42,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:42,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:37:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220067902] [2024-06-27 23:37:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:37:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:37:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:37:42,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:37:42,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 922 transitions, 16387 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:42,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:42,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:37:42,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:45,707 INFO L124 PetriNetUnfolderBase]: 5085/7533 cut-off events. [2024-06-27 23:37:45,707 INFO L125 PetriNetUnfolderBase]: For 2241727/2241731 co-relation queries the response was YES. [2024-06-27 23:37:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102611 conditions, 7533 events. 5085/7533 cut-off events. For 2241727/2241731 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40820 event pairs, 670 based on Foata normal form. 3/7530 useless extension candidates. Maximal degree in co-relation 102426. Up to 6726 conditions per place. [2024-06-27 23:37:45,844 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 789 selfloop transitions, 177 changer transitions 0/970 dead transitions. [2024-06-27 23:37:45,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 970 transitions, 20225 flow [2024-06-27 23:37:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:37:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:37:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 23:37:45,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 23:37:45,845 INFO L175 Difference]: Start difference. First operand has 418 places, 922 transitions, 16387 flow. Second operand 10 states and 202 transitions. [2024-06-27 23:37:45,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 970 transitions, 20225 flow [2024-06-27 23:37:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 970 transitions, 19866 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-06-27 23:37:50,569 INFO L231 Difference]: Finished difference. Result has 423 places, 934 transitions, 16958 flow [2024-06-27 23:37:50,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16028, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16958, PETRI_PLACES=423, PETRI_TRANSITIONS=934} [2024-06-27 23:37:50,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-27 23:37:50,569 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 934 transitions, 16958 flow [2024-06-27 23:37:50,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:50,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:50,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:50,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:37:50,570 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:50,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -642807461, now seen corresponding path program 1 times [2024-06-27 23:37:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765394105] [2024-06-27 23:37:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:52,189 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 23:37:52,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:52,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765394105] [2024-06-27 23:37:52,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765394105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:52,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:52,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:37:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303193237] [2024-06-27 23:37:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:37:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:37:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:37:52,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:37:52,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 934 transitions, 16958 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:37:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:55,314 INFO L124 PetriNetUnfolderBase]: 5103/7563 cut-off events. [2024-06-27 23:37:55,314 INFO L125 PetriNetUnfolderBase]: For 2299747/2299753 co-relation queries the response was YES. [2024-06-27 23:37:55,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104200 conditions, 7563 events. 5103/7563 cut-off events. For 2299747/2299753 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41011 event pairs, 670 based on Foata normal form. 9/7567 useless extension candidates. Maximal degree in co-relation 104013. Up to 7037 conditions per place. [2024-06-27 23:37:55,430 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 822 selfloop transitions, 146 changer transitions 0/972 dead transitions. [2024-06-27 23:37:55,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 972 transitions, 20072 flow [2024-06-27 23:37:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:37:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:37:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:37:55,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 23:37:55,431 INFO L175 Difference]: Start difference. First operand has 423 places, 934 transitions, 16958 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:37:55,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 972 transitions, 20072 flow [2024-06-27 23:37:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 972 transitions, 19684 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-06-27 23:37:59,604 INFO L231 Difference]: Finished difference. Result has 428 places, 938 transitions, 17066 flow [2024-06-27 23:37:59,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16570, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17066, PETRI_PLACES=428, PETRI_TRANSITIONS=938} [2024-06-27 23:37:59,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-27 23:37:59,604 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 938 transitions, 17066 flow [2024-06-27 23:37:59,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:37:59,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:59,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:59,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:37:59,605 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:59,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1656600154, now seen corresponding path program 3 times [2024-06-27 23:37:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:59,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065492554] [2024-06-27 23:37:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:59,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:01,164 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 23:38:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:01,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065492554] [2024-06-27 23:38:01,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065492554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:01,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:38:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102276458] [2024-06-27 23:38:01,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:01,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:38:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:38:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:38:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:38:01,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 938 transitions, 17066 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:38:01,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:38:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:04,187 INFO L124 PetriNetUnfolderBase]: 5097/7551 cut-off events. [2024-06-27 23:38:04,187 INFO L125 PetriNetUnfolderBase]: For 2313729/2313733 co-relation queries the response was YES. [2024-06-27 23:38:04,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104440 conditions, 7551 events. 5097/7551 cut-off events. For 2313729/2313733 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40882 event pairs, 674 based on Foata normal form. 3/7548 useless extension candidates. Maximal degree in co-relation 104251. Up to 6748 conditions per place. [2024-06-27 23:38:04,429 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 803 selfloop transitions, 166 changer transitions 0/973 dead transitions. [2024-06-27 23:38:04,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 973 transitions, 20230 flow [2024-06-27 23:38:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:38:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:38:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 23:38:04,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 23:38:04,430 INFO L175 Difference]: Start difference. First operand has 428 places, 938 transitions, 17066 flow. Second operand 10 states and 201 transitions. [2024-06-27 23:38:04,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 973 transitions, 20230 flow [2024-06-27 23:38:09,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 973 transitions, 19717 flow, removed 140 selfloop flow, removed 7 redundant places. [2024-06-27 23:38:09,217 INFO L231 Difference]: Finished difference. Result has 431 places, 938 transitions, 16898 flow [2024-06-27 23:38:09,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16553, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16898, PETRI_PLACES=431, PETRI_TRANSITIONS=938} [2024-06-27 23:38:09,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-27 23:38:09,218 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 938 transitions, 16898 flow [2024-06-27 23:38:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:38:09,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:09,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:38:09,218 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:09,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash -498715121, now seen corresponding path program 2 times [2024-06-27 23:38:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816143655] [2024-06-27 23:38:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:09,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:10,805 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 23:38:10,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816143655] [2024-06-27 23:38:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816143655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:38:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348853587] [2024-06-27 23:38:10,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:10,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:38:10,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:38:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:38:10,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 23:38:10,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 938 transitions, 16898 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 23:38:10,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:10,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 23:38:10,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:13,737 INFO L124 PetriNetUnfolderBase]: 5115/7580 cut-off events. [2024-06-27 23:38:13,737 INFO L125 PetriNetUnfolderBase]: For 2360032/2360038 co-relation queries the response was YES. [2024-06-27 23:38:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104893 conditions, 7580 events. 5115/7580 cut-off events. For 2360032/2360038 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41097 event pairs, 621 based on Foata normal form. 9/7584 useless extension candidates. Maximal degree in co-relation 104703. Up to 6849 conditions per place. [2024-06-27 23:38:13,873 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 765 selfloop transitions, 206 changer transitions 0/975 dead transitions. [2024-06-27 23:38:13,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 975 transitions, 19820 flow [2024-06-27 23:38:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:38:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:38:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:38:13,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 23:38:13,875 INFO L175 Difference]: Start difference. First operand has 431 places, 938 transitions, 16898 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:38:13,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 975 transitions, 19820 flow