./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_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-eb4cb34-m [2024-06-21 19:26:33,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:26:33,673 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:26:33,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:26:33,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:26:33,703 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:26:33,704 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:26:33,704 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:26:33,705 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:26:33,709 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:26:33,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:26:33,709 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:26:33,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:26:33,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:26:33,711 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:26:33,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:26:33,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:26:33,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:26:33,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:26:33,712 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:26:33,712 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:26:33,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:26:33,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:26:33,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:26:33,713 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:26:33,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:26:33,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:26:33,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:26:33,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:26:33,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:26:33,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:26:33,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:26:33,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:26:33,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:26:33,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:26:33,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:26:33,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:26:33,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:26:33,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:26:33,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:26:33,717 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:26:33,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:26:33,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:26:33,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:26:33,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:26:33,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:26:33,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:26:33,947 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:26:33,947 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:26:33,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:26:34,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:26:35,146 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:26:35,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:26:35,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c51cb54f1/c4524c7d055046e5ac24beef9dc0857d/FLAG7585b5dee [2024-06-21 19:26:35,169 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c51cb54f1/c4524c7d055046e5ac24beef9dc0857d [2024-06-21 19:26:35,171 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:26:35,171 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:26:35,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 19:26:35,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:26:35,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:26:35,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:26:35,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:26:35,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:26:35,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:26:35" (1/2) ... [2024-06-21 19:26:35,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3fb82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:26:35, skipping insertion in model container [2024-06-21 19:26:35,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:26:35" (1/2) ... [2024-06-21 19:26:35,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73c2383a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:26:35, skipping insertion in model container [2024-06-21 19:26:35,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:26:35" (2/2) ... [2024-06-21 19:26:35,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3fb82c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35, skipping insertion in model container [2024-06-21 19:26:35,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:26:35" (2/2) ... [2024-06-21 19:26:35,305 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:26:35,332 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:26:35,333 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-21 19:26:35,333 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-21 19:26:35,333 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (2LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff0 >= 0LL) && (1LL + (long long )z$r_buff0_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$r_buff1_thd1) - (long long )z$w_buff1 >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0) - (long long )z$w_buff1_used >= 0LL) && (2LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) [2024-06-21 19:26:35,334 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:26:35,334 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-21 19:26:35,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:26:35,651 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:26:35,661 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:26:35,875 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:26:35,915 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:26:35,915 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35 WrapperNode [2024-06-21 19:26:35,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:26:35,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:26:35,917 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:26:35,917 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:26:35,923 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 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:35,946 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 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:35,996 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 19:26:35,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:26:35,997 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:26:35,997 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:26:35,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:26:36,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,011 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,028 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]. [2024-06-21 19:26:36,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:26:36,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:26:36,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:26:36,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:26:36,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (1/1) ... [2024-06-21 19:26:36,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:26:36,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:26:36,078 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) [2024-06-21 19:26:36,103 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 [2024-06-21 19:26:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:26:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:26:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:26:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:26:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:26:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:26:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:26:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:26:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:26:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:26:36,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:26:36,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:26:36,138 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:26:36,264 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:26:36,266 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:26:36,789 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:26:36,790 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:26:36,937 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:26:36,937 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:26:36,937 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:26:36 BoogieIcfgContainer [2024-06-21 19:26:36,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:26:36,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:26:36,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:26:36,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:26:36,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:26:35" (1/4) ... [2024-06-21 19:26:36,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39aa8f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:26:36, skipping insertion in model container [2024-06-21 19:26:36,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:26:35" (2/4) ... [2024-06-21 19:26:36,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39aa8f4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:26:36, skipping insertion in model container [2024-06-21 19:26:36,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:26:35" (3/4) ... [2024-06-21 19:26:36,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39aa8f4e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:26:36, skipping insertion in model container [2024-06-21 19:26:36,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:26:36" (4/4) ... [2024-06-21 19:26:36,944 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:26:36,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:26:36,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:26:36,956 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:26:37,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:26:37,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:26:37,092 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 19:26:37,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:26:37,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:26:37,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 19:26:37,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 19:26:37,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:26:37,112 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;@62a256f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:26:37,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:26:37,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:26:37,116 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:26:37,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:26:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:37,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:26:37,117 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)] === [2024-06-21 19:26:37,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 371187043, now seen corresponding path program 1 times [2024-06-21 19:26:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:37,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532839027] [2024-06-21 19:26:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532839027] [2024-06-21 19:26:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532839027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:38,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:26:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562706607] [2024-06-21 19:26:38,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:38,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:26:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:26:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:26:38,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:26:38,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:38,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:38,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:26:38,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:38,815 INFO L124 PetriNetUnfolderBase]: 1156/1754 cut-off events. [2024-06-21 19:26:38,815 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 19:26:38,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1754 events. 1156/1754 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7996 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3569. Up to 1740 conditions per place. [2024-06-21 19:26:38,826 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 19:26:38,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-21 19:26:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:26:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:26:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 19:26:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 19:26:38,836 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-21 19:26:38,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-21 19:26:38,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:26:38,839 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 19:26:38,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 19:26:38,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 19:26:38,843 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 19:26:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:38,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:38,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:26:38,844 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)] === [2024-06-21 19:26:38,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash 229573720, now seen corresponding path program 1 times [2024-06-21 19:26:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:38,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908143981] [2024-06-21 19:26:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:39,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908143981] [2024-06-21 19:26:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908143981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:26:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148903697] [2024-06-21 19:26:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:26:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:26:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:26:39,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:26:39,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:39,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:39,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:26:39,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:40,036 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-21 19:26:40,036 INFO L125 PetriNetUnfolderBase]: For 327/334 co-relation queries the response was YES. [2024-06-21 19:26:40,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 1745 events. 1150/1745 cut-off events. For 327/334 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7836 event pairs, 699 based on Foata normal form. 7/1749 useless extension candidates. Maximal degree in co-relation 4040. Up to 1716 conditions per place. [2024-06-21 19:26:40,045 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-21 19:26:40,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 234 flow [2024-06-21 19:26:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:26:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:26:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 19:26:40,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 19:26:40,049 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-21 19:26:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 234 flow [2024-06-21 19:26:40,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:26:40,052 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-21 19:26:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 19:26:40,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-21 19:26:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-21 19:26:40,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:40,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:40,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:40,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:26:40,057 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)] === [2024-06-21 19:26:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1473147828, now seen corresponding path program 1 times [2024-06-21 19:26:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:40,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118924761] [2024-06-21 19:26:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:40,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:40,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118924761] [2024-06-21 19:26:40,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118924761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:40,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:40,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:26:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882129413] [2024-06-21 19:26:40,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:26:40,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:26:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:26:41,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:26:41,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:41,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:41,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:26:41,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:41,377 INFO L124 PetriNetUnfolderBase]: 1385/2086 cut-off events. [2024-06-21 19:26:41,378 INFO L125 PetriNetUnfolderBase]: For 1057/1065 co-relation queries the response was YES. [2024-06-21 19:26:41,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 2086 events. 1385/2086 cut-off events. For 1057/1065 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9393 event pairs, 709 based on Foata normal form. 9/2093 useless extension candidates. Maximal degree in co-relation 5351. Up to 2043 conditions per place. [2024-06-21 19:26:41,388 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-21 19:26:41,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 351 flow [2024-06-21 19:26:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:26:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:26:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-21 19:26:41,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-21 19:26:41,394 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 109 transitions. [2024-06-21 19:26:41,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 351 flow [2024-06-21 19:26:41,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 330 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 19:26:41,397 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2024-06-21 19:26:41,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-06-21 19:26:41,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-21 19:26:41,398 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2024-06-21 19:26:41,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:41,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:41,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:41,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:26:41,399 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)] === [2024-06-21 19:26:41,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 551950753, now seen corresponding path program 1 times [2024-06-21 19:26:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:41,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13011866] [2024-06-21 19:26:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:42,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:42,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13011866] [2024-06-21 19:26:42,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13011866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:42,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:42,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:26:42,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133161467] [2024-06-21 19:26:42,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:42,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:26:42,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:26:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:26:42,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:26:42,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-21 19:26:42,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:42,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:26:42,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:43,012 INFO L124 PetriNetUnfolderBase]: 1393/2097 cut-off events. [2024-06-21 19:26:43,012 INFO L125 PetriNetUnfolderBase]: For 1918/1937 co-relation queries the response was YES. [2024-06-21 19:26:43,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 2097 events. 1393/2097 cut-off events. For 1918/1937 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9430 event pairs, 583 based on Foata normal form. 17/2112 useless extension candidates. Maximal degree in co-relation 5931. Up to 1989 conditions per place. [2024-06-21 19:26:43,023 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 20 changer transitions 0/94 dead transitions. [2024-06-21 19:26:43,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 94 transitions, 532 flow [2024-06-21 19:26:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:26:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:26:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 19:26:43,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 19:26:43,025 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 140 transitions. [2024-06-21 19:26:43,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 94 transitions, 532 flow [2024-06-21 19:26:43,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 94 transitions, 528 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 19:26:43,028 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 332 flow [2024-06-21 19:26:43,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-06-21 19:26:43,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-21 19:26:43,029 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 332 flow [2024-06-21 19:26:43,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-21 19:26:43,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:43,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:43,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:26:43,030 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)] === [2024-06-21 19:26:43,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1644192203, now seen corresponding path program 1 times [2024-06-21 19:26:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983655367] [2024-06-21 19:26:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:44,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983655367] [2024-06-21 19:26:44,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983655367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:44,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586512309] [2024-06-21 19:26:44,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:44,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:44,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:44,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 19:26:44,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:44,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:44,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 19:26:44,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:44,811 INFO L124 PetriNetUnfolderBase]: 1433/2161 cut-off events. [2024-06-21 19:26:44,811 INFO L125 PetriNetUnfolderBase]: For 3759/3778 co-relation queries the response was YES. [2024-06-21 19:26:44,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7197 conditions, 2161 events. 1433/2161 cut-off events. For 3759/3778 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9827 event pairs, 449 based on Foata normal form. 28/2187 useless extension candidates. Maximal degree in co-relation 7174. Up to 1965 conditions per place. [2024-06-21 19:26:44,824 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-21 19:26:44,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 670 flow [2024-06-21 19:26:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:26:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:26:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 19:26:44,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 19:26:44,826 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 332 flow. Second operand 7 states and 160 transitions. [2024-06-21 19:26:44,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 670 flow [2024-06-21 19:26:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 104 transitions, 658 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 19:26:44,837 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 382 flow [2024-06-21 19:26:44,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-21 19:26:44,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 19:26:44,840 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 382 flow [2024-06-21 19:26:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:44,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:44,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:26:44,842 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)] === [2024-06-21 19:26:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash -889132349, now seen corresponding path program 1 times [2024-06-21 19:26:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136131140] [2024-06-21 19:26:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:46,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:46,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136131140] [2024-06-21 19:26:46,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136131140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:46,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:46,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:26:46,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951374870] [2024-06-21 19:26:46,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:46,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:26:46,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:26:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:26:46,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:26:46,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:46,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:26:46,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:47,056 INFO L124 PetriNetUnfolderBase]: 1652/2488 cut-off events. [2024-06-21 19:26:47,056 INFO L125 PetriNetUnfolderBase]: For 5849/5849 co-relation queries the response was YES. [2024-06-21 19:26:47,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8605 conditions, 2488 events. 1652/2488 cut-off events. For 5849/5849 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11524 event pairs, 949 based on Foata normal form. 4/2489 useless extension candidates. Maximal degree in co-relation 8578. Up to 2436 conditions per place. [2024-06-21 19:26:47,070 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-21 19:26:47,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 634 flow [2024-06-21 19:26:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:26:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:26:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 19:26:47,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 19:26:47,072 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 382 flow. Second operand 5 states and 84 transitions. [2024-06-21 19:26:47,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 634 flow [2024-06-21 19:26:47,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 582 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:26:47,077 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 444 flow [2024-06-21 19:26:47,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-21 19:26:47,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 19:26:47,080 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 444 flow [2024-06-21 19:26:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:47,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:47,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:47,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:26:47,081 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)] === [2024-06-21 19:26:47,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1307636232, now seen corresponding path program 1 times [2024-06-21 19:26:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067003341] [2024-06-21 19:26:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067003341] [2024-06-21 19:26:48,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067003341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:48,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:48,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335014183] [2024-06-21 19:26:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:48,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:26:48,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:48,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:48,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:26:48,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:49,364 INFO L124 PetriNetUnfolderBase]: 1639/2472 cut-off events. [2024-06-21 19:26:49,364 INFO L125 PetriNetUnfolderBase]: For 7491/7553 co-relation queries the response was YES. [2024-06-21 19:26:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9351 conditions, 2472 events. 1639/2472 cut-off events. For 7491/7553 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11493 event pairs, 587 based on Foata normal form. 20/2473 useless extension candidates. Maximal degree in co-relation 9319. Up to 2348 conditions per place. [2024-06-21 19:26:49,386 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 76 selfloop transitions, 31 changer transitions 0/113 dead transitions. [2024-06-21 19:26:49,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 874 flow [2024-06-21 19:26:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:26:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:26:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:26:49,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 19:26:49,388 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 444 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:26:49,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 874 flow [2024-06-21 19:26:49,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 874 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 19:26:49,394 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 643 flow [2024-06-21 19:26:49,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=643, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-21 19:26:49,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-21 19:26:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 643 flow [2024-06-21 19:26:49,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:49,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:49,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:49,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:26:49,397 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)] === [2024-06-21 19:26:49,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1752199324, now seen corresponding path program 2 times [2024-06-21 19:26:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100978443] [2024-06-21 19:26:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:51,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100978443] [2024-06-21 19:26:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100978443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:51,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:51,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813529651] [2024-06-21 19:26:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:51,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:26:51,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 643 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:51,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:51,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:26:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:52,296 INFO L124 PetriNetUnfolderBase]: 1729/2626 cut-off events. [2024-06-21 19:26:52,296 INFO L125 PetriNetUnfolderBase]: For 11564/11695 co-relation queries the response was YES. [2024-06-21 19:26:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10975 conditions, 2626 events. 1729/2626 cut-off events. For 11564/11695 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12445 event pairs, 755 based on Foata normal form. 23/2617 useless extension candidates. Maximal degree in co-relation 10938. Up to 2420 conditions per place. [2024-06-21 19:26:52,310 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 79 selfloop transitions, 57 changer transitions 0/142 dead transitions. [2024-06-21 19:26:52,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1367 flow [2024-06-21 19:26:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:26:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:26:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:26:52,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 19:26:52,312 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 643 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:26:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1367 flow [2024-06-21 19:26:52,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 142 transitions, 1304 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 19:26:52,321 INFO L231 Difference]: Finished difference. Result has 84 places, 112 transitions, 1061 flow [2024-06-21 19:26:52,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1061, PETRI_PLACES=84, PETRI_TRANSITIONS=112} [2024-06-21 19:26:52,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 19:26:52,322 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 112 transitions, 1061 flow [2024-06-21 19:26:52,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:52,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:52,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:26:52,322 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)] === [2024-06-21 19:26:52,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1786482844, now seen corresponding path program 3 times [2024-06-21 19:26:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:52,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697903283] [2024-06-21 19:26:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:54,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:54,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697903283] [2024-06-21 19:26:54,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697903283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:54,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:54,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862935506] [2024-06-21 19:26:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:54,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:54,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:26:54,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 112 transitions, 1061 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:54,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:54,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:26:54,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:55,203 INFO L124 PetriNetUnfolderBase]: 1716/2612 cut-off events. [2024-06-21 19:26:55,203 INFO L125 PetriNetUnfolderBase]: For 13836/13955 co-relation queries the response was YES. [2024-06-21 19:26:55,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11555 conditions, 2612 events. 1716/2612 cut-off events. For 13836/13955 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12428 event pairs, 798 based on Foata normal form. 26/2603 useless extension candidates. Maximal degree in co-relation 11512. Up to 2485 conditions per place. [2024-06-21 19:26:55,216 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-21 19:26:55,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1497 flow [2024-06-21 19:26:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:26:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:26:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:26:55,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 19:26:55,218 INFO L175 Difference]: Start difference. First operand has 84 places, 112 transitions, 1061 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:26:55,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1497 flow [2024-06-21 19:26:55,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 143 transitions, 1399 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:26:55,234 INFO L231 Difference]: Finished difference. Result has 90 places, 119 transitions, 1136 flow [2024-06-21 19:26:55,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=90, PETRI_TRANSITIONS=119} [2024-06-21 19:26:55,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 19:26:55,234 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 119 transitions, 1136 flow [2024-06-21 19:26:55,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:26:55,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:55,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:55,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:26:55,235 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)] === [2024-06-21 19:26:55,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1752319480, now seen corresponding path program 1 times [2024-06-21 19:26:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210137108] [2024-06-21 19:26:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:57,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210137108] [2024-06-21 19:26:57,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210137108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:57,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:57,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:57,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686942387] [2024-06-21 19:26:57,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:57,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:57,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:57,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:57,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:57,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:26:57,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 119 transitions, 1136 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:57,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:57,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:26:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:58,105 INFO L124 PetriNetUnfolderBase]: 1884/2827 cut-off events. [2024-06-21 19:26:58,105 INFO L125 PetriNetUnfolderBase]: For 15292/15295 co-relation queries the response was YES. [2024-06-21 19:26:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12407 conditions, 2827 events. 1884/2827 cut-off events. For 15292/15295 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13230 event pairs, 866 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 12362. Up to 2701 conditions per place. [2024-06-21 19:26:58,124 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 139 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-21 19:26:58,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 171 transitions, 1812 flow [2024-06-21 19:26:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:26:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:26:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:26:58,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:26:58,126 INFO L175 Difference]: Start difference. First operand has 90 places, 119 transitions, 1136 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:26:58,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 171 transitions, 1812 flow [2024-06-21 19:26:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 171 transitions, 1665 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 19:26:58,150 INFO L231 Difference]: Finished difference. Result has 97 places, 140 transitions, 1282 flow [2024-06-21 19:26:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1282, PETRI_PLACES=97, PETRI_TRANSITIONS=140} [2024-06-21 19:26:58,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-21 19:26:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 140 transitions, 1282 flow [2024-06-21 19:26:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:58,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:58,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:26:58,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:26:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 64950304, now seen corresponding path program 4 times [2024-06-21 19:26:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392553746] [2024-06-21 19:26:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:58,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:59,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392553746] [2024-06-21 19:26:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392553746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:59,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:59,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:26:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843128536] [2024-06-21 19:26:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:59,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:26:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:26:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:26:59,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:26:59,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 140 transitions, 1282 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:59,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:59,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:26:59,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:59,903 INFO L124 PetriNetUnfolderBase]: 1979/2970 cut-off events. [2024-06-21 19:26:59,903 INFO L125 PetriNetUnfolderBase]: For 18639/18642 co-relation queries the response was YES. [2024-06-21 19:26:59,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 2970 events. 1979/2970 cut-off events. For 18639/18642 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13988 event pairs, 923 based on Foata normal form. 6/2973 useless extension candidates. Maximal degree in co-relation 13744. Up to 2797 conditions per place. [2024-06-21 19:26:59,924 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 145 selfloop transitions, 54 changer transitions 0/202 dead transitions. [2024-06-21 19:26:59,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 202 transitions, 2245 flow [2024-06-21 19:26:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:26:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:26:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 19:26:59,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 19:26:59,926 INFO L175 Difference]: Start difference. First operand has 97 places, 140 transitions, 1282 flow. Second operand 7 states and 121 transitions. [2024-06-21 19:26:59,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 202 transitions, 2245 flow [2024-06-21 19:26:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 2223 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 19:26:59,966 INFO L231 Difference]: Finished difference. Result has 105 places, 180 transitions, 1929 flow [2024-06-21 19:26:59,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=105, PETRI_TRANSITIONS=180} [2024-06-21 19:26:59,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 19:26:59,967 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 180 transitions, 1929 flow [2024-06-21 19:26:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:59,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:59,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:26:59,967 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)] === [2024-06-21 19:26:59,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1849304366, now seen corresponding path program 5 times [2024-06-21 19:26:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:59,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862850983] [2024-06-21 19:26:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862850983] [2024-06-21 19:27:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862850983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:01,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021295986] [2024-06-21 19:27:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:01,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:01,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:27:01,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 180 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:27:01,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:01,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:27:01,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:01,866 INFO L124 PetriNetUnfolderBase]: 1975/2989 cut-off events. [2024-06-21 19:27:01,866 INFO L125 PetriNetUnfolderBase]: For 24807/24938 co-relation queries the response was YES. [2024-06-21 19:27:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15145 conditions, 2989 events. 1975/2989 cut-off events. For 24807/24938 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14376 event pairs, 824 based on Foata normal form. 16/2922 useless extension candidates. Maximal degree in co-relation 15091. Up to 2787 conditions per place. [2024-06-21 19:27:01,935 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 73 changer transitions 0/236 dead transitions. [2024-06-21 19:27:01,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 236 transitions, 2940 flow [2024-06-21 19:27:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:27:01,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 19:27:01,936 INFO L175 Difference]: Start difference. First operand has 105 places, 180 transitions, 1929 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:27:01,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 236 transitions, 2940 flow [2024-06-21 19:27:01,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 236 transitions, 2903 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 19:27:01,966 INFO L231 Difference]: Finished difference. Result has 114 places, 218 transitions, 2669 flow [2024-06-21 19:27:01,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2669, PETRI_PLACES=114, PETRI_TRANSITIONS=218} [2024-06-21 19:27:01,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 19:27:01,967 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 218 transitions, 2669 flow [2024-06-21 19:27:01,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-21 19:27:01,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:01,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:27:01,968 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)] === [2024-06-21 19:27:01,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 64955140, now seen corresponding path program 2 times [2024-06-21 19:27:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971232150] [2024-06-21 19:27:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:03,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971232150] [2024-06-21 19:27:03,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971232150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:03,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:03,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273518473] [2024-06-21 19:27:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:03,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:03,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 218 transitions, 2669 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:03,600 INFO L124 PetriNetUnfolderBase]: 2097/3145 cut-off events. [2024-06-21 19:27:03,601 INFO L125 PetriNetUnfolderBase]: For 27375/27378 co-relation queries the response was YES. [2024-06-21 19:27:03,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16319 conditions, 3145 events. 2097/3145 cut-off events. For 27375/27378 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14942 event pairs, 931 based on Foata normal form. 3/3145 useless extension candidates. Maximal degree in co-relation 16260. Up to 2999 conditions per place. [2024-06-21 19:27:03,623 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 42 changer transitions 0/254 dead transitions. [2024-06-21 19:27:03,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 254 transitions, 3421 flow [2024-06-21 19:27:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:27:03,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 19:27:03,625 INFO L175 Difference]: Start difference. First operand has 114 places, 218 transitions, 2669 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:27:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 254 transitions, 3421 flow [2024-06-21 19:27:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 254 transitions, 3232 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:03,665 INFO L231 Difference]: Finished difference. Result has 118 places, 232 transitions, 2728 flow [2024-06-21 19:27:03,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2728, PETRI_PLACES=118, PETRI_TRANSITIONS=232} [2024-06-21 19:27:03,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 19:27:03,666 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 232 transitions, 2728 flow [2024-06-21 19:27:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:03,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:03,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:27:03,667 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)] === [2024-06-21 19:27:03,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1286243008, now seen corresponding path program 3 times [2024-06-21 19:27:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:03,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816170576] [2024-06-21 19:27:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816170576] [2024-06-21 19:27:04,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816170576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:04,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:04,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:04,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918929697] [2024-06-21 19:27:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:04,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:04,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:04,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 232 transitions, 2728 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:04,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:04,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:04,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:05,195 INFO L124 PetriNetUnfolderBase]: 2115/3166 cut-off events. [2024-06-21 19:27:05,195 INFO L125 PetriNetUnfolderBase]: For 29652/29655 co-relation queries the response was YES. [2024-06-21 19:27:05,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16698 conditions, 3166 events. 2115/3166 cut-off events. For 29652/29655 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14973 event pairs, 947 based on Foata normal form. 5/3168 useless extension candidates. Maximal degree in co-relation 16638. Up to 3095 conditions per place. [2024-06-21 19:27:05,219 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 233 selfloop transitions, 17 changer transitions 0/253 dead transitions. [2024-06-21 19:27:05,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 253 transitions, 3350 flow [2024-06-21 19:27:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:27:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:27:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 19:27:05,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 19:27:05,221 INFO L175 Difference]: Start difference. First operand has 118 places, 232 transitions, 2728 flow. Second operand 6 states and 97 transitions. [2024-06-21 19:27:05,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 253 transitions, 3350 flow [2024-06-21 19:27:05,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 253 transitions, 3335 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:27:05,262 INFO L231 Difference]: Finished difference. Result has 123 places, 238 transitions, 2830 flow [2024-06-21 19:27:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2830, PETRI_PLACES=123, PETRI_TRANSITIONS=238} [2024-06-21 19:27:05,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-21 19:27:05,263 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 238 transitions, 2830 flow [2024-06-21 19:27:05,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:05,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:05,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:27:05,264 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)] === [2024-06-21 19:27:05,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1286480344, now seen corresponding path program 6 times [2024-06-21 19:27:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299412517] [2024-06-21 19:27:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299412517] [2024-06-21 19:27:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299412517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:06,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:06,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673329741] [2024-06-21 19:27:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:06,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:06,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 238 transitions, 2830 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:06,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:06,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:06,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:06,873 INFO L124 PetriNetUnfolderBase]: 2101/3152 cut-off events. [2024-06-21 19:27:06,873 INFO L125 PetriNetUnfolderBase]: For 32801/32804 co-relation queries the response was YES. [2024-06-21 19:27:06,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16814 conditions, 3152 events. 2101/3152 cut-off events. For 32801/32804 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15006 event pairs, 933 based on Foata normal form. 7/3156 useless extension candidates. Maximal degree in co-relation 16751. Up to 3018 conditions per place. [2024-06-21 19:27:06,894 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 211 selfloop transitions, 42 changer transitions 0/256 dead transitions. [2024-06-21 19:27:06,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 256 transitions, 3424 flow [2024-06-21 19:27:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:27:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:27:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 19:27:06,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:27:06,896 INFO L175 Difference]: Start difference. First operand has 123 places, 238 transitions, 2830 flow. Second operand 6 states and 104 transitions. [2024-06-21 19:27:06,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 256 transitions, 3424 flow [2024-06-21 19:27:06,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 256 transitions, 3362 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:27:06,937 INFO L231 Difference]: Finished difference. Result has 126 places, 240 transitions, 2921 flow [2024-06-21 19:27:06,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=126, PETRI_TRANSITIONS=240} [2024-06-21 19:27:06,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 19:27:06,938 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 240 transitions, 2921 flow [2024-06-21 19:27:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:27:06,939 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)] === [2024-06-21 19:27:06,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1286480158, now seen corresponding path program 4 times [2024-06-21 19:27:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355902662] [2024-06-21 19:27:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:07,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:07,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355902662] [2024-06-21 19:27:07,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355902662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:07,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:07,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118949830] [2024-06-21 19:27:07,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:07,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:07,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 240 transitions, 2921 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:07,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:07,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:08,494 INFO L124 PetriNetUnfolderBase]: 2093/3140 cut-off events. [2024-06-21 19:27:08,495 INFO L125 PetriNetUnfolderBase]: For 35950/35953 co-relation queries the response was YES. [2024-06-21 19:27:08,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 3140 events. 2093/3140 cut-off events. For 35950/35953 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14905 event pairs, 932 based on Foata normal form. 3/3140 useless extension candidates. Maximal degree in co-relation 17043. Up to 2992 conditions per place. [2024-06-21 19:27:08,514 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 205 selfloop transitions, 48 changer transitions 0/256 dead transitions. [2024-06-21 19:27:08,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 256 transitions, 3500 flow [2024-06-21 19:27:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:27:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:27:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 19:27:08,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 19:27:08,516 INFO L175 Difference]: Start difference. First operand has 126 places, 240 transitions, 2921 flow. Second operand 6 states and 101 transitions. [2024-06-21 19:27:08,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 256 transitions, 3500 flow [2024-06-21 19:27:08,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 256 transitions, 3437 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:08,569 INFO L231 Difference]: Finished difference. Result has 130 places, 241 transitions, 3021 flow [2024-06-21 19:27:08,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3021, PETRI_PLACES=130, PETRI_TRANSITIONS=241} [2024-06-21 19:27:08,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 19:27:08,570 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 241 transitions, 3021 flow [2024-06-21 19:27:08,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:08,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:08,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:27:08,571 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)] === [2024-06-21 19:27:08,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1286234080, now seen corresponding path program 1 times [2024-06-21 19:27:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009913838] [2024-06-21 19:27:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009913838] [2024-06-21 19:27:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009913838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:10,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388420768] [2024-06-21 19:27:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:10,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:10,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 241 transitions, 3021 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:10,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:10,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:10,995 INFO L124 PetriNetUnfolderBase]: 2085/3124 cut-off events. [2024-06-21 19:27:10,995 INFO L125 PetriNetUnfolderBase]: For 39095/39098 co-relation queries the response was YES. [2024-06-21 19:27:11,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17363 conditions, 3124 events. 2085/3124 cut-off events. For 39095/39098 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14789 event pairs, 927 based on Foata normal form. 6/3127 useless extension candidates. Maximal degree in co-relation 17296. Up to 3037 conditions per place. [2024-06-21 19:27:11,021 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 15 changer transitions 0/259 dead transitions. [2024-06-21 19:27:11,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 259 transitions, 3613 flow [2024-06-21 19:27:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-21 19:27:11,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:27:11,024 INFO L175 Difference]: Start difference. First operand has 130 places, 241 transitions, 3021 flow. Second operand 7 states and 105 transitions. [2024-06-21 19:27:11,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 259 transitions, 3613 flow [2024-06-21 19:27:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 259 transitions, 3539 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:11,088 INFO L231 Difference]: Finished difference. Result has 134 places, 243 transitions, 3004 flow [2024-06-21 19:27:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=134, PETRI_TRANSITIONS=243} [2024-06-21 19:27:11,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-21 19:27:11,089 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 243 transitions, 3004 flow [2024-06-21 19:27:11,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:11,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:11,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:11,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:27:11,090 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)] === [2024-06-21 19:27:11,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:11,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2004292035, now seen corresponding path program 1 times [2024-06-21 19:27:11,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:11,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146922994] [2024-06-21 19:27:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:12,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:12,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146922994] [2024-06-21 19:27:12,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146922994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:12,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:12,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:27:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620019100] [2024-06-21 19:27:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:12,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:27:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:27:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:27:12,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:27:12,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 243 transitions, 3004 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:12,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:12,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:27:12,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:13,493 INFO L124 PetriNetUnfolderBase]: 2038/3086 cut-off events. [2024-06-21 19:27:13,494 INFO L125 PetriNetUnfolderBase]: For 49691/49800 co-relation queries the response was YES. [2024-06-21 19:27:13,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17672 conditions, 3086 events. 2038/3086 cut-off events. For 49691/49800 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14990 event pairs, 604 based on Foata normal form. 23/2991 useless extension candidates. Maximal degree in co-relation 17604. Up to 2207 conditions per place. [2024-06-21 19:27:13,517 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 121 selfloop transitions, 118 changer transitions 0/303 dead transitions. [2024-06-21 19:27:13,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 303 transitions, 3927 flow [2024-06-21 19:27:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:27:13,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:27:13,519 INFO L175 Difference]: Start difference. First operand has 134 places, 243 transitions, 3004 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:27:13,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 303 transitions, 3927 flow [2024-06-21 19:27:13,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 303 transitions, 3878 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:13,585 INFO L231 Difference]: Finished difference. Result has 140 places, 267 transitions, 3554 flow [2024-06-21 19:27:13,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3554, PETRI_PLACES=140, PETRI_TRANSITIONS=267} [2024-06-21 19:27:13,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 19:27:13,586 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 267 transitions, 3554 flow [2024-06-21 19:27:13,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:13,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:13,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:27:13,587 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)] === [2024-06-21 19:27:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 934422917, now seen corresponding path program 2 times [2024-06-21 19:27:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:13,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684545791] [2024-06-21 19:27:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:15,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:15,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684545791] [2024-06-21 19:27:15,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684545791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:15,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:15,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:15,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112247886] [2024-06-21 19:27:15,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:15,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:15,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:27:15,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 267 transitions, 3554 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) [2024-06-21 19:27:15,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:15,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:27:15,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:15,836 INFO L124 PetriNetUnfolderBase]: 2132/3210 cut-off events. [2024-06-21 19:27:15,836 INFO L125 PetriNetUnfolderBase]: For 58248/58385 co-relation queries the response was YES. [2024-06-21 19:27:15,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20427 conditions, 3210 events. 2132/3210 cut-off events. For 58248/58385 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15508 event pairs, 697 based on Foata normal form. 34/3165 useless extension candidates. Maximal degree in co-relation 20356. Up to 2417 conditions per place. [2024-06-21 19:27:15,861 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 139 changer transitions 0/327 dead transitions. [2024-06-21 19:27:15,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 327 transitions, 4698 flow [2024-06-21 19:27:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 19:27:15,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 19:27:15,863 INFO L175 Difference]: Start difference. First operand has 140 places, 267 transitions, 3554 flow. Second operand 7 states and 157 transitions. [2024-06-21 19:27:15,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 327 transitions, 4698 flow [2024-06-21 19:27:15,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 327 transitions, 4647 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-21 19:27:15,938 INFO L231 Difference]: Finished difference. Result has 147 places, 286 transitions, 4108 flow [2024-06-21 19:27:15,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4108, PETRI_PLACES=147, PETRI_TRANSITIONS=286} [2024-06-21 19:27:15,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-21 19:27:15,939 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 286 transitions, 4108 flow [2024-06-21 19:27:15,939 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) [2024-06-21 19:27:15,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:15,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:27:15,940 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)] === [2024-06-21 19:27:15,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1882018378, now seen corresponding path program 1 times [2024-06-21 19:27:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50100372] [2024-06-21 19:27:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:17,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:17,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50100372] [2024-06-21 19:27:17,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50100372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:17,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:17,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:17,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705828022] [2024-06-21 19:27:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:17,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:17,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:17,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 286 transitions, 4108 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:17,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:17,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:17,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:18,790 INFO L124 PetriNetUnfolderBase]: 2261/3373 cut-off events. [2024-06-21 19:27:18,791 INFO L125 PetriNetUnfolderBase]: For 55572/55578 co-relation queries the response was YES. [2024-06-21 19:27:18,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3373 events. 2261/3373 cut-off events. For 55572/55578 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16031 event pairs, 811 based on Foata normal form. 4/3374 useless extension candidates. Maximal degree in co-relation 21941. Up to 2960 conditions per place. [2024-06-21 19:27:18,821 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 258 selfloop transitions, 101 changer transitions 0/362 dead transitions. [2024-06-21 19:27:18,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 362 transitions, 5630 flow [2024-06-21 19:27:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:27:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:27:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:27:18,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 19:27:18,823 INFO L175 Difference]: Start difference. First operand has 147 places, 286 transitions, 4108 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:27:18,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 362 transitions, 5630 flow [2024-06-21 19:27:18,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 362 transitions, 5517 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 19:27:18,906 INFO L231 Difference]: Finished difference. Result has 157 places, 319 transitions, 4748 flow [2024-06-21 19:27:18,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4748, PETRI_PLACES=157, PETRI_TRANSITIONS=319} [2024-06-21 19:27:18,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-21 19:27:18,907 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 319 transitions, 4748 flow [2024-06-21 19:27:18,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:18,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:18,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:18,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:27:18,907 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)] === [2024-06-21 19:27:18,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1847854673, now seen corresponding path program 3 times [2024-06-21 19:27:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789695742] [2024-06-21 19:27:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:20,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789695742] [2024-06-21 19:27:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789695742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:20,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:20,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481023590] [2024-06-21 19:27:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:20,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:27:20,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 319 transitions, 4748 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) [2024-06-21 19:27:20,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:20,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:27:20,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:21,088 INFO L124 PetriNetUnfolderBase]: 2241/3361 cut-off events. [2024-06-21 19:27:21,089 INFO L125 PetriNetUnfolderBase]: For 68970/69067 co-relation queries the response was YES. [2024-06-21 19:27:21,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23389 conditions, 3361 events. 2241/3361 cut-off events. For 68970/69067 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16307 event pairs, 671 based on Foata normal form. 25/3292 useless extension candidates. Maximal degree in co-relation 23309. Up to 2670 conditions per place. [2024-06-21 19:27:21,119 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 180 selfloop transitions, 162 changer transitions 0/376 dead transitions. [2024-06-21 19:27:21,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 376 transitions, 6031 flow [2024-06-21 19:27:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 19:27:21,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-21 19:27:21,120 INFO L175 Difference]: Start difference. First operand has 157 places, 319 transitions, 4748 flow. Second operand 8 states and 161 transitions. [2024-06-21 19:27:21,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 376 transitions, 6031 flow [2024-06-21 19:27:21,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 376 transitions, 5922 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:21,211 INFO L231 Difference]: Finished difference. Result has 162 places, 334 transitions, 5214 flow [2024-06-21 19:27:21,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5214, PETRI_PLACES=162, PETRI_TRANSITIONS=334} [2024-06-21 19:27:21,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 19:27:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 334 transitions, 5214 flow [2024-06-21 19:27:21,212 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) [2024-06-21 19:27:21,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:21,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:27:21,213 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)] === [2024-06-21 19:27:21,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1516394954, now seen corresponding path program 2 times [2024-06-21 19:27:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:21,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692577998] [2024-06-21 19:27:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:21,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692577998] [2024-06-21 19:27:23,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692577998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:23,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:23,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998773850] [2024-06-21 19:27:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:23,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:23,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:23,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 334 transitions, 5214 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:23,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:23,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:23,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:24,503 INFO L124 PetriNetUnfolderBase]: 2396/3567 cut-off events. [2024-06-21 19:27:24,504 INFO L125 PetriNetUnfolderBase]: For 69824/69832 co-relation queries the response was YES. [2024-06-21 19:27:24,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 3567 events. 2396/3567 cut-off events. For 69824/69832 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17031 event pairs, 779 based on Foata normal form. 7/3571 useless extension candidates. Maximal degree in co-relation 24912. Up to 3134 conditions per place. [2024-06-21 19:27:24,534 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 278 selfloop transitions, 118 changer transitions 0/399 dead transitions. [2024-06-21 19:27:24,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 399 transitions, 6694 flow [2024-06-21 19:27:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:27:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:27:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:27:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 19:27:24,536 INFO L175 Difference]: Start difference. First operand has 162 places, 334 transitions, 5214 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:27:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 399 transitions, 6694 flow [2024-06-21 19:27:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 399 transitions, 6368 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:24,654 INFO L231 Difference]: Finished difference. Result has 169 places, 359 transitions, 5473 flow [2024-06-21 19:27:24,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5473, PETRI_PLACES=169, PETRI_TRANSITIONS=359} [2024-06-21 19:27:24,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 19:27:24,655 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 359 transitions, 5473 flow [2024-06-21 19:27:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:24,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:24,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:27:24,655 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)] === [2024-06-21 19:27:24,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -453605989, now seen corresponding path program 4 times [2024-06-21 19:27:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866906040] [2024-06-21 19:27:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866906040] [2024-06-21 19:27:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866906040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:26,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818107887] [2024-06-21 19:27:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:26,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:27:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 359 transitions, 5473 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) [2024-06-21 19:27:26,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:26,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:27:26,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:26,976 INFO L124 PetriNetUnfolderBase]: 2379/3565 cut-off events. [2024-06-21 19:27:26,977 INFO L125 PetriNetUnfolderBase]: For 83755/83826 co-relation queries the response was YES. [2024-06-21 19:27:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 3565 events. 2379/3565 cut-off events. For 83755/83826 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17491 event pairs, 762 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 25780. Up to 3080 conditions per place. [2024-06-21 19:27:27,010 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 100 changer transitions 0/409 dead transitions. [2024-06-21 19:27:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 409 transitions, 6733 flow [2024-06-21 19:27:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 19:27:27,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-21 19:27:27,012 INFO L175 Difference]: Start difference. First operand has 169 places, 359 transitions, 5473 flow. Second operand 8 states and 157 transitions. [2024-06-21 19:27:27,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 409 transitions, 6733 flow [2024-06-21 19:27:27,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 409 transitions, 6604 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:27,140 INFO L231 Difference]: Finished difference. Result has 175 places, 373 transitions, 5806 flow [2024-06-21 19:27:27,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5344, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5806, PETRI_PLACES=175, PETRI_TRANSITIONS=373} [2024-06-21 19:27:27,141 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 19:27:27,141 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 373 transitions, 5806 flow [2024-06-21 19:27:27,141 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) [2024-06-21 19:27:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:27,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:27:27,142 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:27,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1512670087, now seen corresponding path program 1 times [2024-06-21 19:27:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781997457] [2024-06-21 19:27:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:28,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781997457] [2024-06-21 19:27:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781997457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:28,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846440368] [2024-06-21 19:27:28,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:28,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:28,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 373 transitions, 5806 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:28,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:28,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:28,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:29,740 INFO L124 PetriNetUnfolderBase]: 2515/3737 cut-off events. [2024-06-21 19:27:29,741 INFO L125 PetriNetUnfolderBase]: For 83406/83412 co-relation queries the response was YES. [2024-06-21 19:27:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26905 conditions, 3737 events. 2515/3737 cut-off events. For 83406/83412 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17987 event pairs, 844 based on Foata normal form. 4/3738 useless extension candidates. Maximal degree in co-relation 26817. Up to 3516 conditions per place. [2024-06-21 19:27:29,774 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 350 selfloop transitions, 58 changer transitions 0/411 dead transitions. [2024-06-21 19:27:29,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 411 transitions, 6946 flow [2024-06-21 19:27:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:27:29,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 19:27:29,781 INFO L175 Difference]: Start difference. First operand has 175 places, 373 transitions, 5806 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:27:29,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 411 transitions, 6946 flow [2024-06-21 19:27:29,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 411 transitions, 6775 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 19:27:29,921 INFO L231 Difference]: Finished difference. Result has 179 places, 383 transitions, 5877 flow [2024-06-21 19:27:29,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5635, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5877, PETRI_PLACES=179, PETRI_TRANSITIONS=383} [2024-06-21 19:27:29,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 19:27:29,922 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 383 transitions, 5877 flow [2024-06-21 19:27:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:29,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:29,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:29,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:27:29,923 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)] === [2024-06-21 19:27:29,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1512670304, now seen corresponding path program 3 times [2024-06-21 19:27:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275234712] [2024-06-21 19:27:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275234712] [2024-06-21 19:27:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275234712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:32,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:32,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645001850] [2024-06-21 19:27:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:32,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:32,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:32,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:32,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 383 transitions, 5877 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:32,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:32,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:32,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:33,506 INFO L124 PetriNetUnfolderBase]: 2543/3778 cut-off events. [2024-06-21 19:27:33,506 INFO L125 PetriNetUnfolderBase]: For 89667/89673 co-relation queries the response was YES. [2024-06-21 19:27:33,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27667 conditions, 3778 events. 2543/3778 cut-off events. For 89667/89673 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18214 event pairs, 841 based on Foata normal form. 5/3780 useless extension candidates. Maximal degree in co-relation 27578. Up to 3551 conditions per place. [2024-06-21 19:27:33,543 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 356 selfloop transitions, 78 changer transitions 0/437 dead transitions. [2024-06-21 19:27:33,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 437 transitions, 7201 flow [2024-06-21 19:27:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:27:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:27:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 19:27:33,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-21 19:27:33,545 INFO L175 Difference]: Start difference. First operand has 179 places, 383 transitions, 5877 flow. Second operand 11 states and 177 transitions. [2024-06-21 19:27:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 437 transitions, 7201 flow [2024-06-21 19:27:33,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 437 transitions, 7149 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:33,700 INFO L231 Difference]: Finished difference. Result has 188 places, 398 transitions, 6206 flow [2024-06-21 19:27:33,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6206, PETRI_PLACES=188, PETRI_TRANSITIONS=398} [2024-06-21 19:27:33,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 19:27:33,701 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 398 transitions, 6206 flow [2024-06-21 19:27:33,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:33,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:33,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:33,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:27:33,702 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)] === [2024-06-21 19:27:33,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:33,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1512675884, now seen corresponding path program 4 times [2024-06-21 19:27:33,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:33,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062984308] [2024-06-21 19:27:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062984308] [2024-06-21 19:27:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062984308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18743051] [2024-06-21 19:27:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:35,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:35,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 398 transitions, 6206 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:35,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:35,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:35,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:37,053 INFO L124 PetriNetUnfolderBase]: 2535/3767 cut-off events. [2024-06-21 19:27:37,053 INFO L125 PetriNetUnfolderBase]: For 89854/89860 co-relation queries the response was YES. [2024-06-21 19:27:37,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 3767 events. 2535/3767 cut-off events. For 89854/89860 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18160 event pairs, 841 based on Foata normal form. 5/3769 useless extension candidates. Maximal degree in co-relation 27717. Up to 3543 conditions per place. [2024-06-21 19:27:37,094 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 349 selfloop transitions, 76 changer transitions 0/428 dead transitions. [2024-06-21 19:27:37,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 428 transitions, 7204 flow [2024-06-21 19:27:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:27:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:27:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:27:37,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 19:27:37,096 INFO L175 Difference]: Start difference. First operand has 188 places, 398 transitions, 6206 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:27:37,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 428 transitions, 7204 flow [2024-06-21 19:27:37,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 428 transitions, 7128 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:37,271 INFO L231 Difference]: Finished difference. Result has 194 places, 398 transitions, 6295 flow [2024-06-21 19:27:37,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6295, PETRI_PLACES=194, PETRI_TRANSITIONS=398} [2024-06-21 19:27:37,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 19:27:37,272 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 398 transitions, 6295 flow [2024-06-21 19:27:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:37,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:37,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:27:37,272 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)] === [2024-06-21 19:27:37,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2009885354, now seen corresponding path program 5 times [2024-06-21 19:27:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997174335] [2024-06-21 19:27:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997174335] [2024-06-21 19:27:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997174335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:38,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:38,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:38,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805679369] [2024-06-21 19:27:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:38,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:38,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:38,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 398 transitions, 6295 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:38,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:38,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:38,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:39,320 INFO L124 PetriNetUnfolderBase]: 2615/3885 cut-off events. [2024-06-21 19:27:39,320 INFO L125 PetriNetUnfolderBase]: For 99296/99299 co-relation queries the response was YES. [2024-06-21 19:27:39,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28918 conditions, 3885 events. 2615/3885 cut-off events. For 99296/99299 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18852 event pairs, 932 based on Foata normal form. 5/3887 useless extension candidates. Maximal degree in co-relation 28824. Up to 3467 conditions per place. [2024-06-21 19:27:39,359 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 356 selfloop transitions, 101 changer transitions 0/460 dead transitions. [2024-06-21 19:27:39,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 460 transitions, 7902 flow [2024-06-21 19:27:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:27:39,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 19:27:39,361 INFO L175 Difference]: Start difference. First operand has 194 places, 398 transitions, 6295 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:27:39,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 460 transitions, 7902 flow [2024-06-21 19:27:39,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 460 transitions, 7738 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:27:39,644 INFO L231 Difference]: Finished difference. Result has 197 places, 423 transitions, 6769 flow [2024-06-21 19:27:39,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6769, PETRI_PLACES=197, PETRI_TRANSITIONS=423} [2024-06-21 19:27:39,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 19:27:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 423 transitions, 6769 flow [2024-06-21 19:27:39,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:39,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:39,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:39,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:27:39,646 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)] === [2024-06-21 19:27:39,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2013604424, now seen corresponding path program 6 times [2024-06-21 19:27:39,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:39,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336030032] [2024-06-21 19:27:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336030032] [2024-06-21 19:27:40,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336030032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:40,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:40,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033707642] [2024-06-21 19:27:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:40,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:40,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:40,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 423 transitions, 6769 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:40,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:40,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:40,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:41,864 INFO L124 PetriNetUnfolderBase]: 2729/4057 cut-off events. [2024-06-21 19:27:41,864 INFO L125 PetriNetUnfolderBase]: For 112813/112816 co-relation queries the response was YES. [2024-06-21 19:27:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31281 conditions, 4057 events. 2729/4057 cut-off events. For 112813/112816 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19898 event pairs, 934 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 31183. Up to 3722 conditions per place. [2024-06-21 19:27:41,910 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 400 selfloop transitions, 87 changer transitions 0/490 dead transitions. [2024-06-21 19:27:41,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 490 transitions, 8689 flow [2024-06-21 19:27:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:27:41,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 19:27:41,912 INFO L175 Difference]: Start difference. First operand has 197 places, 423 transitions, 6769 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:27:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 490 transitions, 8689 flow [2024-06-21 19:27:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 490 transitions, 8603 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 19:27:42,126 INFO L231 Difference]: Finished difference. Result has 204 places, 448 transitions, 7313 flow [2024-06-21 19:27:42,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6699, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7313, PETRI_PLACES=204, PETRI_TRANSITIONS=448} [2024-06-21 19:27:42,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 19:27:42,127 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 448 transitions, 7313 flow [2024-06-21 19:27:42,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:42,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:42,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:42,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:27:42,127 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)] === [2024-06-21 19:27:42,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash -266314760, now seen corresponding path program 7 times [2024-06-21 19:27:42,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:42,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597474130] [2024-06-21 19:27:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:42,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597474130] [2024-06-21 19:27:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597474130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:43,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758216952] [2024-06-21 19:27:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:43,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:43,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:43,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 448 transitions, 7313 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:43,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:43,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:43,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:44,409 INFO L124 PetriNetUnfolderBase]: 2705/4024 cut-off events. [2024-06-21 19:27:44,409 INFO L125 PetriNetUnfolderBase]: For 118305/118308 co-relation queries the response was YES. [2024-06-21 19:27:44,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 4024 events. 2705/4024 cut-off events. For 118305/118308 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19684 event pairs, 932 based on Foata normal form. 9/4030 useless extension candidates. Maximal degree in co-relation 31285. Up to 3705 conditions per place. [2024-06-21 19:27:44,448 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 399 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-21 19:27:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 492 transitions, 8664 flow [2024-06-21 19:27:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:27:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:27:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 19:27:44,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 19:27:44,450 INFO L175 Difference]: Start difference. First operand has 204 places, 448 transitions, 7313 flow. Second operand 10 states and 165 transitions. [2024-06-21 19:27:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 492 transitions, 8664 flow [2024-06-21 19:27:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 492 transitions, 8514 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:44,677 INFO L231 Difference]: Finished difference. Result has 212 places, 448 transitions, 7386 flow [2024-06-21 19:27:44,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7386, PETRI_PLACES=212, PETRI_TRANSITIONS=448} [2024-06-21 19:27:44,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 19:27:44,679 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 448 transitions, 7386 flow [2024-06-21 19:27:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:44,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:44,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:44,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:27:44,679 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)] === [2024-06-21 19:27:44,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1218559793, now seen corresponding path program 2 times [2024-06-21 19:27:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:44,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382425560] [2024-06-21 19:27:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:44,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:45,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:45,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382425560] [2024-06-21 19:27:45,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382425560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:45,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:45,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:45,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064236076] [2024-06-21 19:27:45,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:45,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:45,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:45,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:45,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 448 transitions, 7386 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:45,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:45,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:45,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:46,665 INFO L124 PetriNetUnfolderBase]: 2718/4038 cut-off events. [2024-06-21 19:27:46,665 INFO L125 PetriNetUnfolderBase]: For 128810/128813 co-relation queries the response was YES. [2024-06-21 19:27:46,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32197 conditions, 4038 events. 2718/4038 cut-off events. For 128810/128813 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19747 event pairs, 965 based on Foata normal form. 7/4042 useless extension candidates. Maximal degree in co-relation 32093. Up to 3922 conditions per place. [2024-06-21 19:27:46,712 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 445 selfloop transitions, 26 changer transitions 0/474 dead transitions. [2024-06-21 19:27:46,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 474 transitions, 8558 flow [2024-06-21 19:27:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:27:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:27:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 19:27:46,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 19:27:46,714 INFO L175 Difference]: Start difference. First operand has 212 places, 448 transitions, 7386 flow. Second operand 6 states and 99 transitions. [2024-06-21 19:27:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 474 transitions, 8558 flow [2024-06-21 19:27:46,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 474 transitions, 8321 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 19:27:46,977 INFO L231 Difference]: Finished difference. Result has 210 places, 457 transitions, 7369 flow [2024-06-21 19:27:46,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7369, PETRI_PLACES=210, PETRI_TRANSITIONS=457} [2024-06-21 19:27:46,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 19:27:46,978 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 457 transitions, 7369 flow [2024-06-21 19:27:46,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:46,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:46,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:46,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:27:46,979 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)] === [2024-06-21 19:27:46,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash 109392450, now seen corresponding path program 8 times [2024-06-21 19:27:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661626253] [2024-06-21 19:27:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661626253] [2024-06-21 19:27:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661626253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910711696] [2024-06-21 19:27:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:48,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 457 transitions, 7369 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:48,937 INFO L124 PetriNetUnfolderBase]: 2743/4073 cut-off events. [2024-06-21 19:27:48,938 INFO L125 PetriNetUnfolderBase]: For 134627/134630 co-relation queries the response was YES. [2024-06-21 19:27:48,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 4073 events. 2743/4073 cut-off events. For 134627/134630 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19910 event pairs, 967 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 32681. Up to 3974 conditions per place. [2024-06-21 19:27:48,979 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 456 selfloop transitions, 26 changer transitions 0/485 dead transitions. [2024-06-21 19:27:48,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 485 transitions, 8566 flow [2024-06-21 19:27:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 19:27:48,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 19:27:48,980 INFO L175 Difference]: Start difference. First operand has 210 places, 457 transitions, 7369 flow. Second operand 7 states and 111 transitions. [2024-06-21 19:27:48,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 485 transitions, 8566 flow [2024-06-21 19:27:49,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 485 transitions, 8486 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:49,238 INFO L231 Difference]: Finished difference. Result has 212 places, 466 transitions, 7508 flow [2024-06-21 19:27:49,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7508, PETRI_PLACES=212, PETRI_TRANSITIONS=466} [2024-06-21 19:27:49,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 19:27:49,238 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 466 transitions, 7508 flow [2024-06-21 19:27:49,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:49,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:49,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:49,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:27:49,239 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)] === [2024-06-21 19:27:49,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1650990831, now seen corresponding path program 3 times [2024-06-21 19:27:49,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:49,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200730921] [2024-06-21 19:27:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:50,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200730921] [2024-06-21 19:27:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200730921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:50,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:50,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88975527] [2024-06-21 19:27:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:50,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:50,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 466 transitions, 7508 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:50,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:50,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:50,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:51,452 INFO L124 PetriNetUnfolderBase]: 2735/4070 cut-off events. [2024-06-21 19:27:51,453 INFO L125 PetriNetUnfolderBase]: For 134617/134620 co-relation queries the response was YES. [2024-06-21 19:27:51,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32651 conditions, 4070 events. 2735/4070 cut-off events. For 134617/134620 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20003 event pairs, 941 based on Foata normal form. 3/4070 useless extension candidates. Maximal degree in co-relation 32546. Up to 3859 conditions per place. [2024-06-21 19:27:51,489 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 62 changer transitions 0/482 dead transitions. [2024-06-21 19:27:51,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 482 transitions, 8545 flow [2024-06-21 19:27:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:27:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:27:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 19:27:51,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 19:27:51,491 INFO L175 Difference]: Start difference. First operand has 212 places, 466 transitions, 7508 flow. Second operand 6 states and 103 transitions. [2024-06-21 19:27:51,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 482 transitions, 8545 flow [2024-06-21 19:27:51,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 482 transitions, 8440 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:51,741 INFO L231 Difference]: Finished difference. Result has 213 places, 466 transitions, 7561 flow [2024-06-21 19:27:51,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7403, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7561, PETRI_PLACES=213, PETRI_TRANSITIONS=466} [2024-06-21 19:27:51,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 19:27:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 466 transitions, 7561 flow [2024-06-21 19:27:51,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:51,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:27:51,743 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)] === [2024-06-21 19:27:51,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1650991048, now seen corresponding path program 9 times [2024-06-21 19:27:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801441199] [2024-06-21 19:27:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801441199] [2024-06-21 19:27:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801441199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344278308] [2024-06-21 19:27:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:52,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:52,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:52,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 466 transitions, 7561 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:52,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:52,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:52,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:53,950 INFO L124 PetriNetUnfolderBase]: 2787/4145 cut-off events. [2024-06-21 19:27:53,950 INFO L125 PetriNetUnfolderBase]: For 144401/144404 co-relation queries the response was YES. [2024-06-21 19:27:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33640 conditions, 4145 events. 2787/4145 cut-off events. For 144401/144404 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20441 event pairs, 950 based on Foata normal form. 6/4148 useless extension candidates. Maximal degree in co-relation 33534. Up to 3830 conditions per place. [2024-06-21 19:27:54,001 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 441 selfloop transitions, 74 changer transitions 0/518 dead transitions. [2024-06-21 19:27:54,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 518 transitions, 9346 flow [2024-06-21 19:27:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 19:27:54,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 19:27:54,003 INFO L175 Difference]: Start difference. First operand has 213 places, 466 transitions, 7561 flow. Second operand 7 states and 124 transitions. [2024-06-21 19:27:54,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 518 transitions, 9346 flow [2024-06-21 19:27:54,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 518 transitions, 9196 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:27:54,282 INFO L231 Difference]: Finished difference. Result has 216 places, 479 transitions, 7857 flow [2024-06-21 19:27:54,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7857, PETRI_PLACES=216, PETRI_TRANSITIONS=479} [2024-06-21 19:27:54,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 19:27:54,283 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 479 transitions, 7857 flow [2024-06-21 19:27:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:54,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:54,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:54,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:27:54,284 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)] === [2024-06-21 19:27:54,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 109185060, now seen corresponding path program 10 times [2024-06-21 19:27:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857867879] [2024-06-21 19:27:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:55,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857867879] [2024-06-21 19:27:55,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857867879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:55,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:55,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543494500] [2024-06-21 19:27:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:55,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:55,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:27:55,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 479 transitions, 7857 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:55,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:55,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:27:55,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:56,368 INFO L124 PetriNetUnfolderBase]: 2776/4131 cut-off events. [2024-06-21 19:27:56,369 INFO L125 PetriNetUnfolderBase]: For 135545/135548 co-relation queries the response was YES. [2024-06-21 19:27:56,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33287 conditions, 4131 events. 2776/4131 cut-off events. For 135545/135548 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20401 event pairs, 944 based on Foata normal form. 4/4132 useless extension candidates. Maximal degree in co-relation 33181. Up to 3916 conditions per place. [2024-06-21 19:27:56,417 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 433 selfloop transitions, 72 changer transitions 0/508 dead transitions. [2024-06-21 19:27:56,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 508 transitions, 9071 flow [2024-06-21 19:27:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:27:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:27:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 19:27:56,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 19:27:56,418 INFO L175 Difference]: Start difference. First operand has 216 places, 479 transitions, 7857 flow. Second operand 7 states and 118 transitions. [2024-06-21 19:27:56,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 508 transitions, 9071 flow [2024-06-21 19:27:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 508 transitions, 8881 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:56,703 INFO L231 Difference]: Finished difference. Result has 220 places, 485 transitions, 7889 flow [2024-06-21 19:27:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7889, PETRI_PLACES=220, PETRI_TRANSITIONS=485} [2024-06-21 19:27:56,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 19:27:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 485 transitions, 7889 flow [2024-06-21 19:27:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:27:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:56,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:56,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:27:56,704 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)] === [2024-06-21 19:27:56,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1226184305, now seen corresponding path program 5 times [2024-06-21 19:27:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629221412] [2024-06-21 19:27:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629221412] [2024-06-21 19:27:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629221412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:58,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:27:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651505849] [2024-06-21 19:27:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:27:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:27:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:27:58,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:27:58,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 485 transitions, 7889 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 19:27:58,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:58,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:27:58,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:59,364 INFO L124 PetriNetUnfolderBase]: 2740/4109 cut-off events. [2024-06-21 19:27:59,365 INFO L125 PetriNetUnfolderBase]: For 155103/155167 co-relation queries the response was YES. [2024-06-21 19:27:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33584 conditions, 4109 events. 2740/4109 cut-off events. For 155103/155167 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20587 event pairs, 855 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 33477. Up to 3558 conditions per place. [2024-06-21 19:27:59,412 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 358 selfloop transitions, 91 changer transitions 0/536 dead transitions. [2024-06-21 19:27:59,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 536 transitions, 9421 flow [2024-06-21 19:27:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:27:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:27:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:27:59,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 19:27:59,414 INFO L175 Difference]: Start difference. First operand has 220 places, 485 transitions, 7889 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:27:59,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 536 transitions, 9421 flow [2024-06-21 19:27:59,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 536 transitions, 9322 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 19:27:59,721 INFO L231 Difference]: Finished difference. Result has 227 places, 503 transitions, 8372 flow [2024-06-21 19:27:59,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8372, PETRI_PLACES=227, PETRI_TRANSITIONS=503} [2024-06-21 19:27:59,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 19:27:59,722 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 503 transitions, 8372 flow [2024-06-21 19:27:59,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 19:27:59,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:59,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:27:59,723 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:27:59,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 731617954, now seen corresponding path program 1 times [2024-06-21 19:27:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848660482] [2024-06-21 19:27:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848660482] [2024-06-21 19:28:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848660482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:01,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:28:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057659645] [2024-06-21 19:28:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:01,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:28:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:28:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:28:01,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:01,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 503 transitions, 8372 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:01,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:01,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:02,168 INFO L124 PetriNetUnfolderBase]: 2763/4113 cut-off events. [2024-06-21 19:28:02,169 INFO L125 PetriNetUnfolderBase]: For 156140/156301 co-relation queries the response was YES. [2024-06-21 19:28:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33989 conditions, 4113 events. 2763/4113 cut-off events. For 156140/156301 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20373 event pairs, 927 based on Foata normal form. 136/4217 useless extension candidates. Maximal degree in co-relation 33878. Up to 3907 conditions per place. [2024-06-21 19:28:02,210 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 456 selfloop transitions, 17 changer transitions 0/511 dead transitions. [2024-06-21 19:28:02,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 511 transitions, 9352 flow [2024-06-21 19:28:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:28:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:28:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 19:28:02,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 19:28:02,212 INFO L175 Difference]: Start difference. First operand has 227 places, 503 transitions, 8372 flow. Second operand 5 states and 84 transitions. [2024-06-21 19:28:02,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 511 transitions, 9352 flow [2024-06-21 19:28:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 511 transitions, 8956 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 19:28:02,500 INFO L231 Difference]: Finished difference. Result has 224 places, 503 transitions, 8021 flow [2024-06-21 19:28:02,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7976, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8021, PETRI_PLACES=224, PETRI_TRANSITIONS=503} [2024-06-21 19:28:02,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 19:28:02,505 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 503 transitions, 8021 flow [2024-06-21 19:28:02,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:02,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:02,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:28:02,506 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)] === [2024-06-21 19:28:02,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -252327069, now seen corresponding path program 1 times [2024-06-21 19:28:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:02,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125859815] [2024-06-21 19:28:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:04,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:04,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125859815] [2024-06-21 19:28:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125859815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:04,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:28:04,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008746821] [2024-06-21 19:28:04,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:04,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:28:04,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:28:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:28:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:28:04,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 503 transitions, 8021 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:04,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:04,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:28:04,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:05,597 INFO L124 PetriNetUnfolderBase]: 2663/4005 cut-off events. [2024-06-21 19:28:05,597 INFO L125 PetriNetUnfolderBase]: For 169277/169347 co-relation queries the response was YES. [2024-06-21 19:28:05,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33322 conditions, 4005 events. 2663/4005 cut-off events. For 169277/169347 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20111 event pairs, 596 based on Foata normal form. 8/3895 useless extension candidates. Maximal degree in co-relation 33211. Up to 2797 conditions per place. [2024-06-21 19:28:05,644 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 224 selfloop transitions, 189 changer transitions 0/543 dead transitions. [2024-06-21 19:28:05,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 543 transitions, 9219 flow [2024-06-21 19:28:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:28:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:28:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:28:05,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-21 19:28:05,650 INFO L175 Difference]: Start difference. First operand has 224 places, 503 transitions, 8021 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:28:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 543 transitions, 9219 flow [2024-06-21 19:28:05,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 543 transitions, 9194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:28:05,976 INFO L231 Difference]: Finished difference. Result has 230 places, 505 transitions, 8402 flow [2024-06-21 19:28:05,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8402, PETRI_PLACES=230, PETRI_TRANSITIONS=505} [2024-06-21 19:28:05,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 19:28:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 505 transitions, 8402 flow [2024-06-21 19:28:05,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:05,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:05,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:28:05,978 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)] === [2024-06-21 19:28:05,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1043833619, now seen corresponding path program 2 times [2024-06-21 19:28:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:05,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518083115] [2024-06-21 19:28:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:07,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:07,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518083115] [2024-06-21 19:28:07,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518083115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:07,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:07,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:28:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440468212] [2024-06-21 19:28:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:07,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:28:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:28:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:28:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-21 19:28:07,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 505 transitions, 8402 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:07,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:07,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-21 19:28:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:08,625 INFO L124 PetriNetUnfolderBase]: 2389/3757 cut-off events. [2024-06-21 19:28:08,626 INFO L125 PetriNetUnfolderBase]: For 165473/165579 co-relation queries the response was YES. [2024-06-21 19:28:08,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32316 conditions, 3757 events. 2389/3757 cut-off events. For 165473/165579 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20341 event pairs, 296 based on Foata normal form. 15/3599 useless extension candidates. Maximal degree in co-relation 32203. Up to 1755 conditions per place. [2024-06-21 19:28:08,674 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 206 selfloop transitions, 168 changer transitions 0/557 dead transitions. [2024-06-21 19:28:08,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 557 transitions, 9772 flow [2024-06-21 19:28:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 19:28:08,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-21 19:28:08,675 INFO L175 Difference]: Start difference. First operand has 230 places, 505 transitions, 8402 flow. Second operand 8 states and 175 transitions. [2024-06-21 19:28:08,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 557 transitions, 9772 flow [2024-06-21 19:28:09,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 557 transitions, 9392 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:28:09,027 INFO L231 Difference]: Finished difference. Result has 235 places, 516 transitions, 8742 flow [2024-06-21 19:28:09,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8742, PETRI_PLACES=235, PETRI_TRANSITIONS=516} [2024-06-21 19:28:09,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 19:28:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 516 transitions, 8742 flow [2024-06-21 19:28:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:28:09,029 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)] === [2024-06-21 19:28:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2037673641, now seen corresponding path program 1 times [2024-06-21 19:28:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780054860] [2024-06-21 19:28:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780054860] [2024-06-21 19:28:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780054860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:10,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:10,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:28:10,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55319371] [2024-06-21 19:28:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:28:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:28:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:28:10,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:10,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 516 transitions, 8742 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:10,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:10,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:10,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:12,469 INFO L124 PetriNetUnfolderBase]: 3013/4507 cut-off events. [2024-06-21 19:28:12,470 INFO L125 PetriNetUnfolderBase]: For 203388/203465 co-relation queries the response was YES. [2024-06-21 19:28:12,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39562 conditions, 4507 events. 3013/4507 cut-off events. For 203388/203465 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23207 event pairs, 698 based on Foata normal form. 6/4447 useless extension candidates. Maximal degree in co-relation 39444. Up to 3171 conditions per place. [2024-06-21 19:28:12,514 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 339 selfloop transitions, 224 changer transitions 0/609 dead transitions. [2024-06-21 19:28:12,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 609 transitions, 10869 flow [2024-06-21 19:28:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:28:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:28:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 19:28:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 19:28:12,523 INFO L175 Difference]: Start difference. First operand has 235 places, 516 transitions, 8742 flow. Second operand 9 states and 171 transitions. [2024-06-21 19:28:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 609 transitions, 10869 flow [2024-06-21 19:28:12,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 609 transitions, 10765 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 19:28:12,859 INFO L231 Difference]: Finished difference. Result has 244 places, 563 transitions, 9907 flow [2024-06-21 19:28:12,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8647, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9907, PETRI_PLACES=244, PETRI_TRANSITIONS=563} [2024-06-21 19:28:12,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-21 19:28:12,860 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 563 transitions, 9907 flow [2024-06-21 19:28:12,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:12,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:12,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:12,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:28:12,861 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)] === [2024-06-21 19:28:12,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:12,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1446063781, now seen corresponding path program 3 times [2024-06-21 19:28:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:12,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774027902] [2024-06-21 19:28:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:12,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:14,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774027902] [2024-06-21 19:28:14,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774027902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:14,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:14,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375034140] [2024-06-21 19:28:14,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:14,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:14,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:28:14,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 563 transitions, 9907 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) [2024-06-21 19:28:14,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:14,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:28:14,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:16,096 INFO L124 PetriNetUnfolderBase]: 3105/4653 cut-off events. [2024-06-21 19:28:16,097 INFO L125 PetriNetUnfolderBase]: For 227034/227089 co-relation queries the response was YES. [2024-06-21 19:28:16,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41678 conditions, 4653 events. 3105/4653 cut-off events. For 227034/227089 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23904 event pairs, 477 based on Foata normal form. 34/4575 useless extension candidates. Maximal degree in co-relation 41556. Up to 3048 conditions per place. [2024-06-21 19:28:16,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 225 changer transitions 0/624 dead transitions. [2024-06-21 19:28:16,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 624 transitions, 11669 flow [2024-06-21 19:28:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 19:28:16,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-21 19:28:16,156 INFO L175 Difference]: Start difference. First operand has 244 places, 563 transitions, 9907 flow. Second operand 8 states and 179 transitions. [2024-06-21 19:28:16,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 624 transitions, 11669 flow [2024-06-21 19:28:16,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 624 transitions, 11521 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:28:16,626 INFO L231 Difference]: Finished difference. Result has 249 places, 571 transitions, 10390 flow [2024-06-21 19:28:16,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=249, PETRI_TRANSITIONS=571} [2024-06-21 19:28:16,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 19:28:16,627 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 571 transitions, 10390 flow [2024-06-21 19:28:16,627 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) [2024-06-21 19:28:16,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:16,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:16,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:28:16,628 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)] === [2024-06-21 19:28:16,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1446124231, now seen corresponding path program 4 times [2024-06-21 19:28:16,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:16,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990799843] [2024-06-21 19:28:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:16,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990799843] [2024-06-21 19:28:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990799843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:18,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635022792] [2024-06-21 19:28:18,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:18,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:28:18,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 571 transitions, 10390 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) [2024-06-21 19:28:18,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:18,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:28:18,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:19,932 INFO L124 PetriNetUnfolderBase]: 3182/4787 cut-off events. [2024-06-21 19:28:19,932 INFO L125 PetriNetUnfolderBase]: For 235394/235510 co-relation queries the response was YES. [2024-06-21 19:28:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43778 conditions, 4787 events. 3182/4787 cut-off events. For 235394/235510 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24964 event pairs, 673 based on Foata normal form. 37/4707 useless extension candidates. Maximal degree in co-relation 43655. Up to 3540 conditions per place. [2024-06-21 19:28:20,002 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 224 changer transitions 0/622 dead transitions. [2024-06-21 19:28:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 622 transitions, 11945 flow [2024-06-21 19:28:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 19:28:20,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-21 19:28:20,016 INFO L175 Difference]: Start difference. First operand has 249 places, 571 transitions, 10390 flow. Second operand 8 states and 174 transitions. [2024-06-21 19:28:20,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 622 transitions, 11945 flow [2024-06-21 19:28:20,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 622 transitions, 11590 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 19:28:20,492 INFO L231 Difference]: Finished difference. Result has 253 places, 574 transitions, 10557 flow [2024-06-21 19:28:20,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10557, PETRI_PLACES=253, PETRI_TRANSITIONS=574} [2024-06-21 19:28:20,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 19:28:20,493 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 574 transitions, 10557 flow [2024-06-21 19:28:20,494 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) [2024-06-21 19:28:20,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:20,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:28:20,494 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)] === [2024-06-21 19:28:20,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1446124355, now seen corresponding path program 2 times [2024-06-21 19:28:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603034695] [2024-06-21 19:28:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:22,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:22,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603034695] [2024-06-21 19:28:22,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603034695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:22,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:22,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:22,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553978009] [2024-06-21 19:28:22,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:22,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:22,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:22,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:22,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 574 transitions, 10557 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:22,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:23,596 INFO L124 PetriNetUnfolderBase]: 3366/5028 cut-off events. [2024-06-21 19:28:23,596 INFO L125 PetriNetUnfolderBase]: For 223436/223446 co-relation queries the response was YES. [2024-06-21 19:28:23,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45707 conditions, 5028 events. 3366/5028 cut-off events. For 223436/223446 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26118 event pairs, 889 based on Foata normal form. 12/5037 useless extension candidates. Maximal degree in co-relation 45582. Up to 3832 conditions per place. [2024-06-21 19:28:23,658 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 386 selfloop transitions, 251 changer transitions 0/640 dead transitions. [2024-06-21 19:28:23,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 640 transitions, 12679 flow [2024-06-21 19:28:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 19:28:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-21 19:28:23,660 INFO L175 Difference]: Start difference. First operand has 253 places, 574 transitions, 10557 flow. Second operand 8 states and 164 transitions. [2024-06-21 19:28:23,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 640 transitions, 12679 flow [2024-06-21 19:28:24,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 640 transitions, 12200 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 19:28:24,085 INFO L231 Difference]: Finished difference. Result has 258 places, 591 transitions, 11116 flow [2024-06-21 19:28:24,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10098, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11116, PETRI_PLACES=258, PETRI_TRANSITIONS=591} [2024-06-21 19:28:24,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 19:28:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 591 transitions, 11116 flow [2024-06-21 19:28:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:24,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:24,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:28:24,087 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)] === [2024-06-21 19:28:24,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1786971731, now seen corresponding path program 3 times [2024-06-21 19:28:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714144465] [2024-06-21 19:28:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:24,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714144465] [2024-06-21 19:28:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714144465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:25,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:25,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067082367] [2024-06-21 19:28:25,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:25,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:25,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:25,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 591 transitions, 11116 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:25,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:25,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:26,935 INFO L124 PetriNetUnfolderBase]: 3431/5123 cut-off events. [2024-06-21 19:28:26,935 INFO L125 PetriNetUnfolderBase]: For 237671/237685 co-relation queries the response was YES. [2024-06-21 19:28:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47449 conditions, 5123 events. 3431/5123 cut-off events. For 237671/237685 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26675 event pairs, 919 based on Foata normal form. 16/5136 useless extension candidates. Maximal degree in co-relation 47320. Up to 4272 conditions per place. [2024-06-21 19:28:27,004 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 405 selfloop transitions, 240 changer transitions 0/648 dead transitions. [2024-06-21 19:28:27,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 648 transitions, 13232 flow [2024-06-21 19:28:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 19:28:27,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-21 19:28:27,006 INFO L175 Difference]: Start difference. First operand has 258 places, 591 transitions, 11116 flow. Second operand 8 states and 159 transitions. [2024-06-21 19:28:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 648 transitions, 13232 flow [2024-06-21 19:28:27,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 648 transitions, 12900 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 19:28:27,599 INFO L231 Difference]: Finished difference. Result has 263 places, 603 transitions, 11500 flow [2024-06-21 19:28:27,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11500, PETRI_PLACES=263, PETRI_TRANSITIONS=603} [2024-06-21 19:28:27,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-21 19:28:27,600 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 603 transitions, 11500 flow [2024-06-21 19:28:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:27,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:27,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:27,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:28:27,601 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)] === [2024-06-21 19:28:27,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1448920741, now seen corresponding path program 5 times [2024-06-21 19:28:27,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:27,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551900597] [2024-06-21 19:28:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551900597] [2024-06-21 19:28:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551900597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:29,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:29,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797326126] [2024-06-21 19:28:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:29,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:28:29,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 603 transitions, 11500 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) [2024-06-21 19:28:29,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:29,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:28:29,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:30,652 INFO L124 PetriNetUnfolderBase]: 3368/5076 cut-off events. [2024-06-21 19:28:30,652 INFO L125 PetriNetUnfolderBase]: For 272534/272595 co-relation queries the response was YES. [2024-06-21 19:28:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47565 conditions, 5076 events. 3368/5076 cut-off events. For 272534/272595 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26842 event pairs, 715 based on Foata normal form. 40/5001 useless extension candidates. Maximal degree in co-relation 47435. Up to 4061 conditions per place. [2024-06-21 19:28:30,721 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 194 changer transitions 0/656 dead transitions. [2024-06-21 19:28:30,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 656 transitions, 13254 flow [2024-06-21 19:28:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 19:28:30,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534375 [2024-06-21 19:28:30,723 INFO L175 Difference]: Start difference. First operand has 263 places, 603 transitions, 11500 flow. Second operand 8 states and 171 transitions. [2024-06-21 19:28:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 656 transitions, 13254 flow [2024-06-21 19:28:31,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 656 transitions, 12750 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:28:31,305 INFO L231 Difference]: Finished difference. Result has 266 places, 606 transitions, 11453 flow [2024-06-21 19:28:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10996, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11453, PETRI_PLACES=266, PETRI_TRANSITIONS=606} [2024-06-21 19:28:31,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 19:28:31,306 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 606 transitions, 11453 flow [2024-06-21 19:28:31,306 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) [2024-06-21 19:28:31,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:28:31,307 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)] === [2024-06-21 19:28:31,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1448920865, now seen corresponding path program 4 times [2024-06-21 19:28:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405193066] [2024-06-21 19:28:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:32,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:32,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405193066] [2024-06-21 19:28:32,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405193066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:32,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708160485] [2024-06-21 19:28:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:32,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 606 transitions, 11453 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:32,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:32,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:34,200 INFO L124 PetriNetUnfolderBase]: 3563/5331 cut-off events. [2024-06-21 19:28:34,201 INFO L125 PetriNetUnfolderBase]: For 261810/261824 co-relation queries the response was YES. [2024-06-21 19:28:34,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49418 conditions, 5331 events. 3563/5331 cut-off events. For 261810/261824 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28078 event pairs, 935 based on Foata normal form. 16/5344 useless extension candidates. Maximal degree in co-relation 49287. Up to 4412 conditions per place. [2024-06-21 19:28:34,390 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 417 selfloop transitions, 244 changer transitions 0/664 dead transitions. [2024-06-21 19:28:34,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 664 transitions, 13591 flow [2024-06-21 19:28:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 19:28:34,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-21 19:28:34,396 INFO L175 Difference]: Start difference. First operand has 266 places, 606 transitions, 11453 flow. Second operand 8 states and 162 transitions. [2024-06-21 19:28:34,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 664 transitions, 13591 flow [2024-06-21 19:28:34,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 664 transitions, 13239 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:28:34,960 INFO L231 Difference]: Finished difference. Result has 270 places, 616 transitions, 11791 flow [2024-06-21 19:28:34,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11105, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11791, PETRI_PLACES=270, PETRI_TRANSITIONS=616} [2024-06-21 19:28:34,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 19:28:34,961 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 616 transitions, 11791 flow [2024-06-21 19:28:34,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:34,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:34,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:34,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:28:34,962 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)] === [2024-06-21 19:28:34,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1448925701, now seen corresponding path program 1 times [2024-06-21 19:28:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140964501] [2024-06-21 19:28:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140964501] [2024-06-21 19:28:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140964501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:36,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:36,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312914285] [2024-06-21 19:28:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:36,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:36,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:28:36,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 616 transitions, 11791 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:36,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:36,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:28:36,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:37,970 INFO L124 PetriNetUnfolderBase]: 3682/5497 cut-off events. [2024-06-21 19:28:37,970 INFO L125 PetriNetUnfolderBase]: For 279039/279053 co-relation queries the response was YES. [2024-06-21 19:28:38,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51636 conditions, 5497 events. 3682/5497 cut-off events. For 279039/279053 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28930 event pairs, 960 based on Foata normal form. 13/5507 useless extension candidates. Maximal degree in co-relation 51503. Up to 4709 conditions per place. [2024-06-21 19:28:38,049 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 428 selfloop transitions, 260 changer transitions 0/691 dead transitions. [2024-06-21 19:28:38,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 691 transitions, 14299 flow [2024-06-21 19:28:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:28:38,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 19:28:38,051 INFO L175 Difference]: Start difference. First operand has 270 places, 616 transitions, 11791 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:28:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 691 transitions, 14299 flow [2024-06-21 19:28:38,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 691 transitions, 13952 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 19:28:38,737 INFO L231 Difference]: Finished difference. Result has 276 places, 656 transitions, 12919 flow [2024-06-21 19:28:38,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11483, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12919, PETRI_PLACES=276, PETRI_TRANSITIONS=656} [2024-06-21 19:28:38,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 19:28:38,738 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 656 transitions, 12919 flow [2024-06-21 19:28:38,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:38,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:38,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:38,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:28:38,739 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)] === [2024-06-21 19:28:38,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2060806621, now seen corresponding path program 2 times [2024-06-21 19:28:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186411004] [2024-06-21 19:28:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:40,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186411004] [2024-06-21 19:28:40,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186411004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:40,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:40,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712898293] [2024-06-21 19:28:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:40,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:28:40,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 656 transitions, 12919 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:40,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:40,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:28:40,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:42,063 INFO L124 PetriNetUnfolderBase]: 3723/5557 cut-off events. [2024-06-21 19:28:42,064 INFO L125 PetriNetUnfolderBase]: For 290956/290974 co-relation queries the response was YES. [2024-06-21 19:28:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53743 conditions, 5557 events. 3723/5557 cut-off events. For 290956/290974 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29319 event pairs, 871 based on Foata normal form. 18/5572 useless extension candidates. Maximal degree in co-relation 53606. Up to 4755 conditions per place. [2024-06-21 19:28:42,136 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 437 selfloop transitions, 274 changer transitions 0/714 dead transitions. [2024-06-21 19:28:42,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 714 transitions, 15381 flow [2024-06-21 19:28:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:28:42,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-21 19:28:42,137 INFO L175 Difference]: Start difference. First operand has 276 places, 656 transitions, 12919 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:28:42,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 714 transitions, 15381 flow [2024-06-21 19:28:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 714 transitions, 15194 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 19:28:42,816 INFO L231 Difference]: Finished difference. Result has 282 places, 678 transitions, 13808 flow [2024-06-21 19:28:42,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12758, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13808, PETRI_PLACES=282, PETRI_TRANSITIONS=678} [2024-06-21 19:28:42,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-21 19:28:42,817 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 678 transitions, 13808 flow [2024-06-21 19:28:42,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:42,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:42,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:42,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:28:42,817 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)] === [2024-06-21 19:28:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1176883045, now seen corresponding path program 6 times [2024-06-21 19:28:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:42,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441784592] [2024-06-21 19:28:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:44,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441784592] [2024-06-21 19:28:44,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441784592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:44,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:44,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:44,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169661876] [2024-06-21 19:28:44,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:44,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:44,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:44,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:44,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 19:28:44,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 678 transitions, 13808 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) [2024-06-21 19:28:44,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:44,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 19:28:44,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:46,289 INFO L124 PetriNetUnfolderBase]: 3666/5535 cut-off events. [2024-06-21 19:28:46,289 INFO L125 PetriNetUnfolderBase]: For 338277/338311 co-relation queries the response was YES. [2024-06-21 19:28:46,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54899 conditions, 5535 events. 3666/5535 cut-off events. For 338277/338311 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29832 event pairs, 912 based on Foata normal form. 23/5413 useless extension candidates. Maximal degree in co-relation 54759. Up to 4756 conditions per place. [2024-06-21 19:28:46,361 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 488 selfloop transitions, 112 changer transitions 0/731 dead transitions. [2024-06-21 19:28:46,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 731 transitions, 15720 flow [2024-06-21 19:28:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 19:28:46,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-21 19:28:46,362 INFO L175 Difference]: Start difference. First operand has 282 places, 678 transitions, 13808 flow. Second operand 8 states and 167 transitions. [2024-06-21 19:28:46,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 731 transitions, 15720 flow [2024-06-21 19:28:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 731 transitions, 15376 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:28:47,084 INFO L231 Difference]: Finished difference. Result has 287 places, 689 transitions, 13946 flow [2024-06-21 19:28:47,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13470, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13946, PETRI_PLACES=287, PETRI_TRANSITIONS=689} [2024-06-21 19:28:47,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 19:28:47,095 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 689 transitions, 13946 flow [2024-06-21 19:28:47,095 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) [2024-06-21 19:28:47,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:47,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:28:47,096 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)] === [2024-06-21 19:28:47,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash 351868471, now seen corresponding path program 1 times [2024-06-21 19:28:47,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:47,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054543435] [2024-06-21 19:28:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:47,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054543435] [2024-06-21 19:28:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054543435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884912778] [2024-06-21 19:28:48,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:48,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:48,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 689 transitions, 13946 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:48,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:48,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:48,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:50,476 INFO L124 PetriNetUnfolderBase]: 3848/5759 cut-off events. [2024-06-21 19:28:50,477 INFO L125 PetriNetUnfolderBase]: For 312641/312647 co-relation queries the response was YES. [2024-06-21 19:28:50,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56397 conditions, 5759 events. 3848/5759 cut-off events. For 312641/312647 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30735 event pairs, 1032 based on Foata normal form. 6/5762 useless extension candidates. Maximal degree in co-relation 56255. Up to 5467 conditions per place. [2024-06-21 19:28:50,559 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 642 selfloop transitions, 75 changer transitions 0/720 dead transitions. [2024-06-21 19:28:50,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 720 transitions, 15608 flow [2024-06-21 19:28:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:28:50,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:28:50,561 INFO L175 Difference]: Start difference. First operand has 287 places, 689 transitions, 13946 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:28:50,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 720 transitions, 15608 flow [2024-06-21 19:28:51,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 720 transitions, 15430 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 19:28:51,469 INFO L231 Difference]: Finished difference. Result has 291 places, 691 transitions, 13964 flow [2024-06-21 19:28:51,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13768, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13964, PETRI_PLACES=291, PETRI_TRANSITIONS=691} [2024-06-21 19:28:51,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 19:28:51,469 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 691 transitions, 13964 flow [2024-06-21 19:28:51,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:51,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:51,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:28:51,470 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:28:51,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash 351688733, now seen corresponding path program 3 times [2024-06-21 19:28:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:51,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557607523] [2024-06-21 19:28:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:53,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:53,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557607523] [2024-06-21 19:28:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557607523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:53,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938754787] [2024-06-21 19:28:53,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:53,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:53,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:53,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:53,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:53,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:28:53,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 691 transitions, 13964 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:53,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:53,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:28:53,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:55,079 INFO L124 PetriNetUnfolderBase]: 3887/5812 cut-off events. [2024-06-21 19:28:55,079 INFO L125 PetriNetUnfolderBase]: For 323179/323185 co-relation queries the response was YES. [2024-06-21 19:28:55,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57115 conditions, 5812 events. 3887/5812 cut-off events. For 323179/323185 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31017 event pairs, 1030 based on Foata normal form. 6/5815 useless extension candidates. Maximal degree in co-relation 56971. Up to 5447 conditions per place. [2024-06-21 19:28:55,171 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 621 selfloop transitions, 116 changer transitions 0/740 dead transitions. [2024-06-21 19:28:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 740 transitions, 16156 flow [2024-06-21 19:28:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:28:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:28:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:28:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-21 19:28:55,173 INFO L175 Difference]: Start difference. First operand has 291 places, 691 transitions, 13964 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:28:55,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 740 transitions, 16156 flow [2024-06-21 19:28:55,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 740 transitions, 16020 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:28:56,006 INFO L231 Difference]: Finished difference. Result has 295 places, 706 transitions, 14446 flow [2024-06-21 19:28:56,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14446, PETRI_PLACES=295, PETRI_TRANSITIONS=706} [2024-06-21 19:28:56,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-21 19:28:56,007 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 706 transitions, 14446 flow [2024-06-21 19:28:56,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:28:56,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:56,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:28:56,007 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)] === [2024-06-21 19:28:56,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 351688547, now seen corresponding path program 5 times [2024-06-21 19:28:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430755685] [2024-06-21 19:28:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430755685] [2024-06-21 19:28:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430755685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:57,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:57,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:28:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901497611] [2024-06-21 19:28:57,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:28:57,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:28:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:28:57,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:28:57,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 706 transitions, 14446 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:28:57,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:57,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:28:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:59,148 INFO L124 PetriNetUnfolderBase]: 3923/5869 cut-off events. [2024-06-21 19:28:59,148 INFO L125 PetriNetUnfolderBase]: For 339713/339719 co-relation queries the response was YES. [2024-06-21 19:28:59,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58003 conditions, 5869 events. 3923/5869 cut-off events. For 339713/339719 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31416 event pairs, 1029 based on Foata normal form. 8/5874 useless extension candidates. Maximal degree in co-relation 57858. Up to 5310 conditions per place. [2024-06-21 19:28:59,233 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 170 changer transitions 0/761 dead transitions. [2024-06-21 19:28:59,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 761 transitions, 16742 flow [2024-06-21 19:28:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:28:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:28:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:28:59,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 19:28:59,236 INFO L175 Difference]: Start difference. First operand has 295 places, 706 transitions, 14446 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:28:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 761 transitions, 16742 flow [2024-06-21 19:29:00,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 761 transitions, 16512 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 19:29:00,085 INFO L231 Difference]: Finished difference. Result has 299 places, 712 transitions, 14695 flow [2024-06-21 19:29:00,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14223, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14695, PETRI_PLACES=299, PETRI_TRANSITIONS=712} [2024-06-21 19:29:00,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-21 19:29:00,086 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 712 transitions, 14695 flow [2024-06-21 19:29:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:00,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:00,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:00,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:29:00,086 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)] === [2024-06-21 19:29:00,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 351683897, now seen corresponding path program 6 times [2024-06-21 19:29:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899322471] [2024-06-21 19:29:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899322471] [2024-06-21 19:29:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899322471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249251936] [2024-06-21 19:29:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:01,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:29:01,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 712 transitions, 14695 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:01,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:01,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:29:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:03,283 INFO L124 PetriNetUnfolderBase]: 4011/6002 cut-off events. [2024-06-21 19:29:03,284 INFO L125 PetriNetUnfolderBase]: For 349763/349769 co-relation queries the response was YES. [2024-06-21 19:29:03,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59484 conditions, 6002 events. 4011/6002 cut-off events. For 349763/349769 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32242 event pairs, 1032 based on Foata normal form. 8/6007 useless extension candidates. Maximal degree in co-relation 59338. Up to 5297 conditions per place. [2024-06-21 19:29:03,381 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 591 selfloop transitions, 180 changer transitions 0/774 dead transitions. [2024-06-21 19:29:03,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 774 transitions, 17267 flow [2024-06-21 19:29:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:29:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:29:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:29:03,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 19:29:03,383 INFO L175 Difference]: Start difference. First operand has 299 places, 712 transitions, 14695 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:29:03,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 774 transitions, 17267 flow [2024-06-21 19:29:04,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 774 transitions, 16899 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:29:04,332 INFO L231 Difference]: Finished difference. Result has 302 places, 726 transitions, 15007 flow [2024-06-21 19:29:04,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14327, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15007, PETRI_PLACES=302, PETRI_TRANSITIONS=726} [2024-06-21 19:29:04,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 19:29:04,332 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 726 transitions, 15007 flow [2024-06-21 19:29:04,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:04,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:04,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:04,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:29:04,334 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)] === [2024-06-21 19:29:04,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash 351868223, now seen corresponding path program 4 times [2024-06-21 19:29:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:04,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920725530] [2024-06-21 19:29:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:04,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:05,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920725530] [2024-06-21 19:29:05,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920725530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:05,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:29:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042127122] [2024-06-21 19:29:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:29:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:29:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:29:05,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:05,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 726 transitions, 15007 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 19:29:05,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:05,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:05,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:07,827 INFO L124 PetriNetUnfolderBase]: 4000/5981 cut-off events. [2024-06-21 19:29:07,828 INFO L125 PetriNetUnfolderBase]: For 356600/356606 co-relation queries the response was YES. [2024-06-21 19:29:07,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59592 conditions, 5981 events. 4000/5981 cut-off events. For 356600/356606 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32073 event pairs, 1034 based on Foata normal form. 6/5984 useless extension candidates. Maximal degree in co-relation 59444. Up to 5614 conditions per place. [2024-06-21 19:29:07,912 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 643 selfloop transitions, 119 changer transitions 0/765 dead transitions. [2024-06-21 19:29:07,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 765 transitions, 16791 flow [2024-06-21 19:29:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:29:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:29:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:29:07,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 19:29:07,914 INFO L175 Difference]: Start difference. First operand has 302 places, 726 transitions, 15007 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:29:07,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 765 transitions, 16791 flow [2024-06-21 19:29:08,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 765 transitions, 16512 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 19:29:08,811 INFO L231 Difference]: Finished difference. Result has 308 places, 726 transitions, 14992 flow [2024-06-21 19:29:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14728, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14992, PETRI_PLACES=308, PETRI_TRANSITIONS=726} [2024-06-21 19:29:08,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 19:29:08,812 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 726 transitions, 14992 flow [2024-06-21 19:29:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 19:29:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:08,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:29:08,813 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)] === [2024-06-21 19:29:08,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash 351861527, now seen corresponding path program 7 times [2024-06-21 19:29:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:08,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045149454] [2024-06-21 19:29:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:08,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:10,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:10,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045149454] [2024-06-21 19:29:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045149454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:10,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:10,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596187604] [2024-06-21 19:29:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:10,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:10,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:10,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:29:10,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 726 transitions, 14992 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:10,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:10,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:29:10,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:11,920 INFO L124 PetriNetUnfolderBase]: 3984/5962 cut-off events. [2024-06-21 19:29:11,920 INFO L125 PetriNetUnfolderBase]: For 362153/362159 co-relation queries the response was YES. [2024-06-21 19:29:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59513 conditions, 5962 events. 3984/5962 cut-off events. For 362153/362159 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32005 event pairs, 1031 based on Foata normal form. 8/5967 useless extension candidates. Maximal degree in co-relation 59363. Up to 5403 conditions per place. [2024-06-21 19:29:12,005 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 605 selfloop transitions, 174 changer transitions 0/782 dead transitions. [2024-06-21 19:29:12,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 782 transitions, 17133 flow [2024-06-21 19:29:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:29:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:29:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 19:29:12,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-21 19:29:12,007 INFO L175 Difference]: Start difference. First operand has 308 places, 726 transitions, 14992 flow. Second operand 11 states and 189 transitions. [2024-06-21 19:29:12,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 782 transitions, 17133 flow [2024-06-21 19:29:13,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 782 transitions, 16790 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-21 19:29:13,020 INFO L231 Difference]: Finished difference. Result has 308 places, 728 transitions, 15073 flow [2024-06-21 19:29:13,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14667, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15073, PETRI_PLACES=308, PETRI_TRANSITIONS=728} [2024-06-21 19:29:13,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 19:29:13,021 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 728 transitions, 15073 flow [2024-06-21 19:29:13,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:13,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:13,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:13,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:29:13,022 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)] === [2024-06-21 19:29:13,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash 879352993, now seen corresponding path program 2 times [2024-06-21 19:29:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:13,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393951145] [2024-06-21 19:29:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:14,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393951145] [2024-06-21 19:29:14,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393951145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:14,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:14,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154667357] [2024-06-21 19:29:14,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:14,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:14,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 728 transitions, 15073 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:14,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:15,952 INFO L124 PetriNetUnfolderBase]: 4001/5987 cut-off events. [2024-06-21 19:29:15,953 INFO L125 PetriNetUnfolderBase]: For 363699/363702 co-relation queries the response was YES. [2024-06-21 19:29:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 5987 events. 4001/5987 cut-off events. For 363699/363702 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32128 event pairs, 1224 based on Foata normal form. 6/5990 useless extension candidates. Maximal degree in co-relation 59571. Up to 5818 conditions per place. [2024-06-21 19:29:16,047 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 724 selfloop transitions, 29 changer transitions 0/756 dead transitions. [2024-06-21 19:29:16,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 756 transitions, 16784 flow [2024-06-21 19:29:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:29:16,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 19:29:16,049 INFO L175 Difference]: Start difference. First operand has 308 places, 728 transitions, 15073 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:29:16,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 756 transitions, 16784 flow [2024-06-21 19:29:17,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 756 transitions, 16440 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:29:17,030 INFO L231 Difference]: Finished difference. Result has 307 places, 730 transitions, 14836 flow [2024-06-21 19:29:17,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14729, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14836, PETRI_PLACES=307, PETRI_TRANSITIONS=730} [2024-06-21 19:29:17,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 19:29:17,031 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 730 transitions, 14836 flow [2024-06-21 19:29:17,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:17,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:17,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:17,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:29:17,032 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)] === [2024-06-21 19:29:17,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash -910234515, now seen corresponding path program 7 times [2024-06-21 19:29:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:17,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462276748] [2024-06-21 19:29:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462276748] [2024-06-21 19:29:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462276748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:18,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:18,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421238887] [2024-06-21 19:29:18,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:18,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:18,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:29:18,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 730 transitions, 14836 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:29:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:20,603 INFO L124 PetriNetUnfolderBase]: 3979/6022 cut-off events. [2024-06-21 19:29:20,603 INFO L125 PetriNetUnfolderBase]: For 404140/404208 co-relation queries the response was YES. [2024-06-21 19:29:20,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59296 conditions, 6022 events. 3979/6022 cut-off events. For 404140/404208 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33035 event pairs, 1074 based on Foata normal form. 36/5902 useless extension candidates. Maximal degree in co-relation 59145. Up to 5146 conditions per place. [2024-06-21 19:29:20,701 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 542 selfloop transitions, 106 changer transitions 0/794 dead transitions. [2024-06-21 19:29:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 794 transitions, 16962 flow [2024-06-21 19:29:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:29:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-21 19:29:20,704 INFO L175 Difference]: Start difference. First operand has 307 places, 730 transitions, 14836 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:29:20,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 794 transitions, 16962 flow [2024-06-21 19:29:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 794 transitions, 16880 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 19:29:21,732 INFO L231 Difference]: Finished difference. Result has 314 places, 755 transitions, 15510 flow [2024-06-21 19:29:21,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14754, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15510, PETRI_PLACES=314, PETRI_TRANSITIONS=755} [2024-06-21 19:29:21,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 19:29:21,733 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 755 transitions, 15510 flow [2024-06-21 19:29:21,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:29:21,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:21,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:29:21,733 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)] === [2024-06-21 19:29:21,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1498299713, now seen corresponding path program 8 times [2024-06-21 19:29:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034236229] [2024-06-21 19:29:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034236229] [2024-06-21 19:29:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034236229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:23,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:23,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874759616] [2024-06-21 19:29:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:23,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:23,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 755 transitions, 15510 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:23,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:23,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:23,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:25,365 INFO L124 PetriNetUnfolderBase]: 4219/6340 cut-off events. [2024-06-21 19:29:25,366 INFO L125 PetriNetUnfolderBase]: For 394278/394281 co-relation queries the response was YES. [2024-06-21 19:29:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63271 conditions, 6340 events. 4219/6340 cut-off events. For 394278/394281 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34703 event pairs, 1213 based on Foata normal form. 6/6343 useless extension candidates. Maximal degree in co-relation 63116. Up to 5919 conditions per place. [2024-06-21 19:29:25,446 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 705 selfloop transitions, 100 changer transitions 0/808 dead transitions. [2024-06-21 19:29:25,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 808 transitions, 18079 flow [2024-06-21 19:29:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:29:25,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:29:25,448 INFO L175 Difference]: Start difference. First operand has 314 places, 755 transitions, 15510 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:29:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 808 transitions, 18079 flow [2024-06-21 19:29:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 808 transitions, 17960 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 19:29:26,406 INFO L231 Difference]: Finished difference. Result has 320 places, 769 transitions, 15918 flow [2024-06-21 19:29:26,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15393, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15918, PETRI_PLACES=320, PETRI_TRANSITIONS=769} [2024-06-21 19:29:26,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 19:29:26,407 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 769 transitions, 15918 flow [2024-06-21 19:29:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:26,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:26,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:26,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:29:26,408 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)] === [2024-06-21 19:29:26,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1498304549, now seen corresponding path program 5 times [2024-06-21 19:29:26,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:26,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134287570] [2024-06-21 19:29:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:26,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:27,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134287570] [2024-06-21 19:29:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134287570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:27,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139592439] [2024-06-21 19:29:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:27,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:27,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:27,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 769 transitions, 15918 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:27,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:29,650 INFO L124 PetriNetUnfolderBase]: 4205/6313 cut-off events. [2024-06-21 19:29:29,651 INFO L125 PetriNetUnfolderBase]: For 398117/398120 co-relation queries the response was YES. [2024-06-21 19:29:29,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62947 conditions, 6313 events. 4205/6313 cut-off events. For 398117/398120 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34428 event pairs, 1215 based on Foata normal form. 5/6315 useless extension candidates. Maximal degree in co-relation 62790. Up to 5957 conditions per place. [2024-06-21 19:29:29,741 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 687 selfloop transitions, 107 changer transitions 0/797 dead transitions. [2024-06-21 19:29:29,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 797 transitions, 17956 flow [2024-06-21 19:29:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:29:29,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 19:29:29,743 INFO L175 Difference]: Start difference. First operand has 320 places, 769 transitions, 15918 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:29:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 797 transitions, 17956 flow [2024-06-21 19:29:30,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 797 transitions, 17822 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-21 19:29:30,904 INFO L231 Difference]: Finished difference. Result has 326 places, 769 transitions, 16023 flow [2024-06-21 19:29:30,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15784, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16023, PETRI_PLACES=326, PETRI_TRANSITIONS=769} [2024-06-21 19:29:30,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 19:29:30,905 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 769 transitions, 16023 flow [2024-06-21 19:29:30,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:30,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:30,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:29:30,905 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)] === [2024-06-21 19:29:30,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 643177633, now seen corresponding path program 3 times [2024-06-21 19:29:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174929582] [2024-06-21 19:29:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:32,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:32,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174929582] [2024-06-21 19:29:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174929582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886226264] [2024-06-21 19:29:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:32,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:32,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 769 transitions, 16023 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:32,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:32,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:32,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:34,316 INFO L124 PetriNetUnfolderBase]: 4239/6370 cut-off events. [2024-06-21 19:29:34,316 INFO L125 PetriNetUnfolderBase]: For 413774/413777 co-relation queries the response was YES. [2024-06-21 19:29:34,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63566 conditions, 6370 events. 4239/6370 cut-off events. For 413774/413777 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34867 event pairs, 1225 based on Foata normal form. 4/6371 useless extension candidates. Maximal degree in co-relation 63407. Up to 6081 conditions per place. [2024-06-21 19:29:34,418 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 725 selfloop transitions, 66 changer transitions 0/794 dead transitions. [2024-06-21 19:29:34,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 794 transitions, 17770 flow [2024-06-21 19:29:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:29:34,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 19:29:34,420 INFO L175 Difference]: Start difference. First operand has 326 places, 769 transitions, 16023 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:29:34,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 794 transitions, 17770 flow [2024-06-21 19:29:35,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 794 transitions, 17337 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 19:29:35,501 INFO L231 Difference]: Finished difference. Result has 326 places, 773 transitions, 15791 flow [2024-06-21 19:29:35,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15590, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15791, PETRI_PLACES=326, PETRI_TRANSITIONS=773} [2024-06-21 19:29:35,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 19:29:35,502 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 773 transitions, 15791 flow [2024-06-21 19:29:35,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:35,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:35,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:29:35,502 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)] === [2024-06-21 19:29:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 879352745, now seen corresponding path program 6 times [2024-06-21 19:29:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:35,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476412356] [2024-06-21 19:29:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:36,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476412356] [2024-06-21 19:29:36,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476412356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:36,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:36,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:36,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376718320] [2024-06-21 19:29:36,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:36,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:36,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 773 transitions, 15791 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:36,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:36,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:38,553 INFO L124 PetriNetUnfolderBase]: 4231/6350 cut-off events. [2024-06-21 19:29:38,553 INFO L125 PetriNetUnfolderBase]: For 402995/402998 co-relation queries the response was YES. [2024-06-21 19:29:38,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62968 conditions, 6350 events. 4231/6350 cut-off events. For 402995/402998 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34666 event pairs, 1251 based on Foata normal form. 5/6352 useless extension candidates. Maximal degree in co-relation 62811. Up to 6190 conditions per place. [2024-06-21 19:29:38,653 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 754 selfloop transitions, 37 changer transitions 0/794 dead transitions. [2024-06-21 19:29:38,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 794 transitions, 17527 flow [2024-06-21 19:29:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:29:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:29:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 19:29:38,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 19:29:38,655 INFO L175 Difference]: Start difference. First operand has 326 places, 773 transitions, 15791 flow. Second operand 7 states and 114 transitions. [2024-06-21 19:29:38,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 794 transitions, 17527 flow [2024-06-21 19:29:39,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 794 transitions, 17382 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 19:29:39,779 INFO L231 Difference]: Finished difference. Result has 328 places, 773 transitions, 15742 flow [2024-06-21 19:29:39,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15646, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15742, PETRI_PLACES=328, PETRI_TRANSITIONS=773} [2024-06-21 19:29:39,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-21 19:29:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 773 transitions, 15742 flow [2024-06-21 19:29:39,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:39,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:39,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:29:39,781 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)] === [2024-06-21 19:29:39,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 879649663, now seen corresponding path program 4 times [2024-06-21 19:29:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030354885] [2024-06-21 19:29:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:40,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030354885] [2024-06-21 19:29:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030354885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:40,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:40,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:40,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275440857] [2024-06-21 19:29:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:41,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:41,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 773 transitions, 15742 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:41,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:41,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:41,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:42,736 INFO L124 PetriNetUnfolderBase]: 4223/6337 cut-off events. [2024-06-21 19:29:42,737 INFO L125 PetriNetUnfolderBase]: For 410530/410533 co-relation queries the response was YES. [2024-06-21 19:29:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62776 conditions, 6337 events. 4223/6337 cut-off events. For 410530/410533 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34502 event pairs, 1235 based on Foata normal form. 6/6340 useless extension candidates. Maximal degree in co-relation 62618. Up to 6184 conditions per place. [2024-06-21 19:29:42,839 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 776 selfloop transitions, 17 changer transitions 0/796 dead transitions. [2024-06-21 19:29:42,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 796 transitions, 17486 flow [2024-06-21 19:29:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 19:29:42,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 19:29:42,841 INFO L175 Difference]: Start difference. First operand has 328 places, 773 transitions, 15742 flow. Second operand 8 states and 119 transitions. [2024-06-21 19:29:42,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 796 transitions, 17486 flow [2024-06-21 19:29:44,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 796 transitions, 17340 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:29:44,094 INFO L231 Difference]: Finished difference. Result has 330 places, 775 transitions, 15685 flow [2024-06-21 19:29:44,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15596, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15685, PETRI_PLACES=330, PETRI_TRANSITIONS=775} [2024-06-21 19:29:44,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-21 19:29:44,095 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 775 transitions, 15685 flow [2024-06-21 19:29:44,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:44,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:44,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:29:44,096 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)] === [2024-06-21 19:29:44,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash 871078535, now seen corresponding path program 7 times [2024-06-21 19:29:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:44,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987164125] [2024-06-21 19:29:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:45,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:45,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987164125] [2024-06-21 19:29:45,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987164125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:45,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:45,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690221230] [2024-06-21 19:29:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:45,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:45,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 775 transitions, 15685 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:45,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:45,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:45,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:47,232 INFO L124 PetriNetUnfolderBase]: 4209/6317 cut-off events. [2024-06-21 19:29:47,232 INFO L125 PetriNetUnfolderBase]: For 417205/417205 co-relation queries the response was YES. [2024-06-21 19:29:47,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62597 conditions, 6317 events. 4209/6317 cut-off events. For 417205/417205 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34385 event pairs, 1245 based on Foata normal form. 5/6320 useless extension candidates. Maximal degree in co-relation 62438. Up to 6145 conditions per place. [2024-06-21 19:29:47,509 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 757 selfloop transitions, 41 changer transitions 0/801 dead transitions. [2024-06-21 19:29:47,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 801 transitions, 17482 flow [2024-06-21 19:29:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:29:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:29:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:29:47,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 19:29:47,511 INFO L175 Difference]: Start difference. First operand has 330 places, 775 transitions, 15685 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:29:47,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 801 transitions, 17482 flow [2024-06-21 19:29:48,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 801 transitions, 17385 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:29:48,422 INFO L231 Difference]: Finished difference. Result has 333 places, 777 transitions, 15731 flow [2024-06-21 19:29:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15590, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15731, PETRI_PLACES=333, PETRI_TRANSITIONS=777} [2024-06-21 19:29:48,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 19:29:48,422 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 777 transitions, 15731 flow [2024-06-21 19:29:48,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:48,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:29:48,423 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)] === [2024-06-21 19:29:48,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash 717067555, now seen corresponding path program 9 times [2024-06-21 19:29:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263486721] [2024-06-21 19:29:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:49,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263486721] [2024-06-21 19:29:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263486721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:49,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:49,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815033755] [2024-06-21 19:29:49,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:49,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:49,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 777 transitions, 15731 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:49,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:49,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:49,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:51,907 INFO L124 PetriNetUnfolderBase]: 4245/6384 cut-off events. [2024-06-21 19:29:51,907 INFO L125 PetriNetUnfolderBase]: For 432958/432961 co-relation queries the response was YES. [2024-06-21 19:29:51,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63298 conditions, 6384 events. 4245/6384 cut-off events. For 432958/432961 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35000 event pairs, 1222 based on Foata normal form. 6/6387 useless extension candidates. Maximal degree in co-relation 63137. Up to 6073 conditions per place. [2024-06-21 19:29:52,008 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 726 selfloop transitions, 85 changer transitions 0/814 dead transitions. [2024-06-21 19:29:52,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 814 transitions, 17778 flow [2024-06-21 19:29:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:29:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:29:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:29:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 19:29:52,010 INFO L175 Difference]: Start difference. First operand has 333 places, 777 transitions, 15731 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:29:52,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 814 transitions, 17778 flow [2024-06-21 19:29:53,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 814 transitions, 17549 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:29:53,178 INFO L231 Difference]: Finished difference. Result has 333 places, 783 transitions, 15819 flow [2024-06-21 19:29:53,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15502, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15819, PETRI_PLACES=333, PETRI_TRANSITIONS=783} [2024-06-21 19:29:53,179 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 19:29:53,179 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 783 transitions, 15819 flow [2024-06-21 19:29:53,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:53,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:53,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:53,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:29:53,180 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)] === [2024-06-21 19:29:53,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 871071839, now seen corresponding path program 10 times [2024-06-21 19:29:53,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:53,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842803902] [2024-06-21 19:29:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:53,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:54,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:54,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842803902] [2024-06-21 19:29:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842803902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:54,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:54,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900946191] [2024-06-21 19:29:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:54,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 783 transitions, 15819 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:54,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:54,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:54,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:29:56,557 INFO L124 PetriNetUnfolderBase]: 4281/6427 cut-off events. [2024-06-21 19:29:56,558 INFO L125 PetriNetUnfolderBase]: For 443441/443444 co-relation queries the response was YES. [2024-06-21 19:29:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64163 conditions, 6427 events. 4281/6427 cut-off events. For 443441/443444 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35118 event pairs, 1249 based on Foata normal form. 8/6432 useless extension candidates. Maximal degree in co-relation 64001. Up to 6224 conditions per place. [2024-06-21 19:29:56,668 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 768 selfloop transitions, 44 changer transitions 0/815 dead transitions. [2024-06-21 19:29:56,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 815 transitions, 17765 flow [2024-06-21 19:29:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:29:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:29:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:29:56,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 19:29:56,670 INFO L175 Difference]: Start difference. First operand has 333 places, 783 transitions, 15819 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:29:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 815 transitions, 17765 flow [2024-06-21 19:29:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 815 transitions, 17607 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 19:29:57,873 INFO L231 Difference]: Finished difference. Result has 338 places, 789 transitions, 15910 flow [2024-06-21 19:29:57,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15661, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15910, PETRI_PLACES=338, PETRI_TRANSITIONS=789} [2024-06-21 19:29:57,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-21 19:29:57,874 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 789 transitions, 15910 flow [2024-06-21 19:29:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:57,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:29:57,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:29:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:29:57,874 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:29:57,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:29:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 642997709, now seen corresponding path program 11 times [2024-06-21 19:29:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:29:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149354656] [2024-06-21 19:29:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:29:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:29:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:29:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:29:59,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:29:59,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149354656] [2024-06-21 19:29:59,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149354656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:29:59,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:29:59,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:29:59,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852145878] [2024-06-21 19:29:59,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:29:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:29:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:29:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:29:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:29:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:29:59,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 789 transitions, 15910 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:29:59,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:29:59,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:29:59,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:01,244 INFO L124 PetriNetUnfolderBase]: 4265/6417 cut-off events. [2024-06-21 19:30:01,244 INFO L125 PetriNetUnfolderBase]: For 448810/448813 co-relation queries the response was YES. [2024-06-21 19:30:01,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63696 conditions, 6417 events. 4265/6417 cut-off events. For 448810/448813 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35226 event pairs, 1216 based on Foata normal form. 6/6420 useless extension candidates. Maximal degree in co-relation 63533. Up to 6103 conditions per place. [2024-06-21 19:30:01,347 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 728 selfloop transitions, 90 changer transitions 0/821 dead transitions. [2024-06-21 19:30:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 821 transitions, 17859 flow [2024-06-21 19:30:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:30:01,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 19:30:01,349 INFO L175 Difference]: Start difference. First operand has 338 places, 789 transitions, 15910 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:30:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 821 transitions, 17859 flow [2024-06-21 19:30:02,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 821 transitions, 17650 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 19:30:02,652 INFO L231 Difference]: Finished difference. Result has 340 places, 791 transitions, 15948 flow [2024-06-21 19:30:02,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15717, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15948, PETRI_PLACES=340, PETRI_TRANSITIONS=791} [2024-06-21 19:30:02,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 19:30:02,654 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 791 transitions, 15948 flow [2024-06-21 19:30:02,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-21 19:30:02,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:02,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:02,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:30:02,654 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)] === [2024-06-21 19:30:02,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -452998007, now seen corresponding path program 1 times [2024-06-21 19:30:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:02,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463270185] [2024-06-21 19:30:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:04,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463270185] [2024-06-21 19:30:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463270185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:04,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:30:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112830806] [2024-06-21 19:30:04,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:30:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:30:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:30:04,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 19:30:04,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 791 transitions, 15948 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:04,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:04,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 19:30:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:06,623 INFO L124 PetriNetUnfolderBase]: 3816/5952 cut-off events. [2024-06-21 19:30:06,623 INFO L125 PetriNetUnfolderBase]: For 563008/563210 co-relation queries the response was YES. [2024-06-21 19:30:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62260 conditions, 5952 events. 3816/5952 cut-off events. For 563008/563210 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35264 event pairs, 371 based on Foata normal form. 36/5760 useless extension candidates. Maximal degree in co-relation 62096. Up to 2879 conditions per place. [2024-06-21 19:30:06,724 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 368 selfloop transitions, 274 changer transitions 0/851 dead transitions. [2024-06-21 19:30:06,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 851 transitions, 17976 flow [2024-06-21 19:30:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 19:30:06,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2024-06-21 19:30:06,725 INFO L175 Difference]: Start difference. First operand has 340 places, 791 transitions, 15948 flow. Second operand 9 states and 187 transitions. [2024-06-21 19:30:06,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 851 transitions, 17976 flow [2024-06-21 19:30:08,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 851 transitions, 17785 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:30:08,136 INFO L231 Difference]: Finished difference. Result has 346 places, 802 transitions, 16825 flow [2024-06-21 19:30:08,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15757, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16825, PETRI_PLACES=346, PETRI_TRANSITIONS=802} [2024-06-21 19:30:08,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 19:30:08,137 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 802 transitions, 16825 flow [2024-06-21 19:30:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:30:08,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:08,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:30:08,138 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)] === [2024-06-21 19:30:08,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1878305101, now seen corresponding path program 2 times [2024-06-21 19:30:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547612448] [2024-06-21 19:30:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:09,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547612448] [2024-06-21 19:30:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547612448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066570612] [2024-06-21 19:30:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:09,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:09,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:10,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:10,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 802 transitions, 16825 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:10,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:10,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:10,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:12,148 INFO L124 PetriNetUnfolderBase]: 4584/6922 cut-off events. [2024-06-21 19:30:12,149 INFO L125 PetriNetUnfolderBase]: For 570804/570814 co-relation queries the response was YES. [2024-06-21 19:30:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71064 conditions, 6922 events. 4584/6922 cut-off events. For 570804/570814 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38694 event pairs, 759 based on Foata normal form. 30/6949 useless extension candidates. Maximal degree in co-relation 70896. Up to 4353 conditions per place. [2024-06-21 19:30:12,267 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 473 selfloop transitions, 403 changer transitions 0/879 dead transitions. [2024-06-21 19:30:12,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 879 transitions, 19833 flow [2024-06-21 19:30:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 19:30:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-21 19:30:12,269 INFO L175 Difference]: Start difference. First operand has 346 places, 802 transitions, 16825 flow. Second operand 9 states and 185 transitions. [2024-06-21 19:30:12,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 879 transitions, 19833 flow [2024-06-21 19:30:13,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 879 transitions, 19459 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 19:30:13,940 INFO L231 Difference]: Finished difference. Result has 353 places, 814 transitions, 17667 flow [2024-06-21 19:30:13,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16529, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17667, PETRI_PLACES=353, PETRI_TRANSITIONS=814} [2024-06-21 19:30:13,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-21 19:30:13,941 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 814 transitions, 17667 flow [2024-06-21 19:30:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:13,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:13,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:13,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:30:13,942 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)] === [2024-06-21 19:30:13,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1880182771, now seen corresponding path program 3 times [2024-06-21 19:30:13,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054682445] [2024-06-21 19:30:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:15,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054682445] [2024-06-21 19:30:15,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054682445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:15,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:15,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:15,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583959307] [2024-06-21 19:30:15,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:15,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:15,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:15,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 814 transitions, 17667 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:15,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:15,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:15,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:17,882 INFO L124 PetriNetUnfolderBase]: 4725/7174 cut-off events. [2024-06-21 19:30:17,882 INFO L125 PetriNetUnfolderBase]: For 603609/603619 co-relation queries the response was YES. [2024-06-21 19:30:17,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73577 conditions, 7174 events. 4725/7174 cut-off events. For 603609/603619 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40853 event pairs, 1123 based on Foata normal form. 36/7207 useless extension candidates. Maximal degree in co-relation 73407. Up to 5425 conditions per place. [2024-06-21 19:30:18,192 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 396 changer transitions 0/869 dead transitions. [2024-06-21 19:30:18,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 869 transitions, 20090 flow [2024-06-21 19:30:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 19:30:18,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 19:30:18,194 INFO L175 Difference]: Start difference. First operand has 353 places, 814 transitions, 17667 flow. Second operand 9 states and 180 transitions. [2024-06-21 19:30:18,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 869 transitions, 20090 flow [2024-06-21 19:30:19,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 869 transitions, 19470 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 19:30:19,719 INFO L231 Difference]: Finished difference. Result has 358 places, 817 transitions, 17930 flow [2024-06-21 19:30:19,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17051, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17930, PETRI_PLACES=358, PETRI_TRANSITIONS=817} [2024-06-21 19:30:19,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-21 19:30:19,720 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 817 transitions, 17930 flow [2024-06-21 19:30:19,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:19,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:19,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:30:19,721 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)] === [2024-06-21 19:30:19,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179051, now seen corresponding path program 4 times [2024-06-21 19:30:19,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:19,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022334504] [2024-06-21 19:30:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:21,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:21,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022334504] [2024-06-21 19:30:21,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022334504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:21,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464471613] [2024-06-21 19:30:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:21,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:21,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 817 transitions, 17930 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:21,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:21,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:21,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:23,906 INFO L124 PetriNetUnfolderBase]: 4821/7332 cut-off events. [2024-06-21 19:30:23,907 INFO L125 PetriNetUnfolderBase]: For 611940/611950 co-relation queries the response was YES. [2024-06-21 19:30:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75444 conditions, 7332 events. 4821/7332 cut-off events. For 611940/611950 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42147 event pairs, 1087 based on Foata normal form. 30/7359 useless extension candidates. Maximal degree in co-relation 75272. Up to 5362 conditions per place. [2024-06-21 19:30:24,032 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 478 selfloop transitions, 402 changer transitions 0/883 dead transitions. [2024-06-21 19:30:24,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 883 transitions, 20542 flow [2024-06-21 19:30:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 19:30:24,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-21 19:30:24,034 INFO L175 Difference]: Start difference. First operand has 358 places, 817 transitions, 17930 flow. Second operand 9 states and 184 transitions. [2024-06-21 19:30:24,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 883 transitions, 20542 flow [2024-06-21 19:30:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 883 transitions, 19738 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:30:25,797 INFO L231 Difference]: Finished difference. Result has 361 places, 823 transitions, 18111 flow [2024-06-21 19:30:25,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17126, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18111, PETRI_PLACES=361, PETRI_TRANSITIONS=823} [2024-06-21 19:30:25,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 19:30:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 823 transitions, 18111 flow [2024-06-21 19:30:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:25,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:25,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:25,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:30:25,799 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)] === [2024-06-21 19:30:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash 438307763, now seen corresponding path program 5 times [2024-06-21 19:30:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017543729] [2024-06-21 19:30:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:27,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:27,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017543729] [2024-06-21 19:30:27,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017543729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:27,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:27,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:27,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203449128] [2024-06-21 19:30:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:27,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:27,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:27,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:27,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 823 transitions, 18111 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:27,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:27,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:27,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:29,945 INFO L124 PetriNetUnfolderBase]: 4945/7560 cut-off events. [2024-06-21 19:30:29,945 INFO L125 PetriNetUnfolderBase]: For 644442/644452 co-relation queries the response was YES. [2024-06-21 19:30:30,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77232 conditions, 7560 events. 4945/7560 cut-off events. For 644442/644452 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44097 event pairs, 1302 based on Foata normal form. 36/7593 useless extension candidates. Maximal degree in co-relation 77058. Up to 6328 conditions per place. [2024-06-21 19:30:30,082 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 554 selfloop transitions, 323 changer transitions 0/880 dead transitions. [2024-06-21 19:30:30,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 880 transitions, 20496 flow [2024-06-21 19:30:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:30:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:30:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 19:30:30,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 19:30:30,084 INFO L175 Difference]: Start difference. First operand has 361 places, 823 transitions, 18111 flow. Second operand 10 states and 184 transitions. [2024-06-21 19:30:30,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 880 transitions, 20496 flow [2024-06-21 19:30:32,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 880 transitions, 19930 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:30:32,016 INFO L231 Difference]: Finished difference. Result has 366 places, 825 transitions, 18269 flow [2024-06-21 19:30:32,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17545, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18269, PETRI_PLACES=366, PETRI_TRANSITIONS=825} [2024-06-21 19:30:32,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 19:30:32,017 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 825 transitions, 18269 flow [2024-06-21 19:30:32,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:32,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:32,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:32,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:30:32,018 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)] === [2024-06-21 19:30:32,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1966870861, now seen corresponding path program 6 times [2024-06-21 19:30:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:32,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832228371] [2024-06-21 19:30:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832228371] [2024-06-21 19:30:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832228371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:33,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:33,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:33,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199497328] [2024-06-21 19:30:33,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:33,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:33,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 825 transitions, 18269 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:33,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:33,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:33,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:36,408 INFO L124 PetriNetUnfolderBase]: 5224/8019 cut-off events. [2024-06-21 19:30:36,408 INFO L125 PetriNetUnfolderBase]: For 713830/713840 co-relation queries the response was YES. [2024-06-21 19:30:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82880 conditions, 8019 events. 5224/8019 cut-off events. For 713830/713840 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47755 event pairs, 1339 based on Foata normal form. 30/8046 useless extension candidates. Maximal degree in co-relation 82703. Up to 6381 conditions per place. [2024-06-21 19:30:36,531 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 573 selfloop transitions, 315 changer transitions 0/891 dead transitions. [2024-06-21 19:30:36,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 891 transitions, 21028 flow [2024-06-21 19:30:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 19:30:36,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-21 19:30:36,533 INFO L175 Difference]: Start difference. First operand has 366 places, 825 transitions, 18269 flow. Second operand 9 states and 179 transitions. [2024-06-21 19:30:36,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 891 transitions, 21028 flow [2024-06-21 19:30:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 891 transitions, 20360 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:30:38,667 INFO L231 Difference]: Finished difference. Result has 368 places, 831 transitions, 18425 flow [2024-06-21 19:30:38,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17601, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18425, PETRI_PLACES=368, PETRI_TRANSITIONS=831} [2024-06-21 19:30:38,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 19:30:38,669 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 831 transitions, 18425 flow [2024-06-21 19:30:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:38,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:38,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:38,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:30:38,670 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)] === [2024-06-21 19:30:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1967018731, now seen corresponding path program 7 times [2024-06-21 19:30:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626686154] [2024-06-21 19:30:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:38,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626686154] [2024-06-21 19:30:40,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626686154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:40,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:40,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:40,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111972196] [2024-06-21 19:30:40,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:40,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:30:40,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 831 transitions, 18425 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:40,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:40,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:30:40,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:42,857 INFO L124 PetriNetUnfolderBase]: 5165/7933 cut-off events. [2024-06-21 19:30:42,858 INFO L125 PetriNetUnfolderBase]: For 687243/687253 co-relation queries the response was YES. [2024-06-21 19:30:42,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80795 conditions, 7933 events. 5165/7933 cut-off events. For 687243/687253 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47207 event pairs, 1400 based on Foata normal form. 36/7966 useless extension candidates. Maximal degree in co-relation 80617. Up to 6756 conditions per place. [2024-06-21 19:30:43,003 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 563 selfloop transitions, 319 changer transitions 0/885 dead transitions. [2024-06-21 19:30:43,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 885 transitions, 20780 flow [2024-06-21 19:30:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:30:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:30:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:30:43,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 19:30:43,005 INFO L175 Difference]: Start difference. First operand has 368 places, 831 transitions, 18425 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:30:43,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 885 transitions, 20780 flow [2024-06-21 19:30:45,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 885 transitions, 20311 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 19:30:45,239 INFO L231 Difference]: Finished difference. Result has 373 places, 833 transitions, 18682 flow [2024-06-21 19:30:45,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17984, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18682, PETRI_PLACES=373, PETRI_TRANSITIONS=833} [2024-06-21 19:30:45,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 19:30:45,240 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 833 transitions, 18682 flow [2024-06-21 19:30:45,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:30:45,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:45,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:30:45,241 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)] === [2024-06-21 19:30:45,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1967024683, now seen corresponding path program 1 times [2024-06-21 19:30:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:45,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431171886] [2024-06-21 19:30:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431171886] [2024-06-21 19:30:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431171886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:46,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238282937] [2024-06-21 19:30:46,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:46,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:46,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:30:46,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 833 transitions, 18682 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:30:46,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:46,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:30:46,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:49,438 INFO L124 PetriNetUnfolderBase]: 5193/7973 cut-off events. [2024-06-21 19:30:49,439 INFO L125 PetriNetUnfolderBase]: For 653714/653724 co-relation queries the response was YES. [2024-06-21 19:30:49,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81663 conditions, 7973 events. 5193/7973 cut-off events. For 653714/653724 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47515 event pairs, 1415 based on Foata normal form. 12/7982 useless extension candidates. Maximal degree in co-relation 81482. Up to 7072 conditions per place. [2024-06-21 19:30:49,587 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 567 selfloop transitions, 303 changer transitions 0/873 dead transitions. [2024-06-21 19:30:49,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 873 transitions, 20732 flow [2024-06-21 19:30:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:30:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:30:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:30:49,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 19:30:49,589 INFO L175 Difference]: Start difference. First operand has 373 places, 833 transitions, 18682 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:30:49,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 873 transitions, 20732 flow [2024-06-21 19:30:51,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 873 transitions, 20096 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:30:51,840 INFO L231 Difference]: Finished difference. Result has 375 places, 837 transitions, 18776 flow [2024-06-21 19:30:51,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18046, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18776, PETRI_PLACES=375, PETRI_TRANSITIONS=837} [2024-06-21 19:30:51,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 19:30:51,841 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 837 transitions, 18776 flow [2024-06-21 19:30:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:30:51,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:51,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:30:51,842 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)] === [2024-06-21 19:30:51,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1261609227, now seen corresponding path program 2 times [2024-06-21 19:30:51,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:51,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347542057] [2024-06-21 19:30:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:51,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:30:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:30:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:30:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347542057] [2024-06-21 19:30:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347542057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:30:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:30:53,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:30:53,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678482938] [2024-06-21 19:30:53,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:30:53,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:30:53,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:30:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:30:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:30:53,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:30:53,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 837 transitions, 18776 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:30:53,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:30:53,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:30:53,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:30:56,126 INFO L124 PetriNetUnfolderBase]: 5232/8038 cut-off events. [2024-06-21 19:30:56,126 INFO L125 PetriNetUnfolderBase]: For 672615/672625 co-relation queries the response was YES. [2024-06-21 19:30:56,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82567 conditions, 8038 events. 5232/8038 cut-off events. For 672615/672625 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 47955 event pairs, 1297 based on Foata normal form. 12/8047 useless extension candidates. Maximal degree in co-relation 82385. Up to 7123 conditions per place. [2024-06-21 19:30:56,253 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 579 selfloop transitions, 296 changer transitions 0/878 dead transitions. [2024-06-21 19:30:56,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 878 transitions, 20932 flow [2024-06-21 19:30:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:30:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:30:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:30:56,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 19:30:56,255 INFO L175 Difference]: Start difference. First operand has 375 places, 837 transitions, 18776 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:30:56,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 878 transitions, 20932 flow [2024-06-21 19:30:58,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 878 transitions, 20196 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-21 19:30:58,296 INFO L231 Difference]: Finished difference. Result has 376 places, 843 transitions, 18835 flow [2024-06-21 19:30:58,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18092, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18835, PETRI_PLACES=376, PETRI_TRANSITIONS=843} [2024-06-21 19:30:58,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-21 19:30:58,297 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 843 transitions, 18835 flow [2024-06-21 19:30:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:30:58,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:30:58,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:30:58,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:30:58,298 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)] === [2024-06-21 19:30:58,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:30:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2117909725, now seen corresponding path program 3 times [2024-06-21 19:30:58,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:30:58,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80454801] [2024-06-21 19:30:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:30:58,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:30:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:00,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:00,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80454801] [2024-06-21 19:31:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80454801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:00,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:00,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:31:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863674207] [2024-06-21 19:31:00,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:00,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:31:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:31:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:31:00,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:31:00,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 843 transitions, 18835 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:00,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:00,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:31:00,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:02,875 INFO L124 PetriNetUnfolderBase]: 5312/8173 cut-off events. [2024-06-21 19:31:02,875 INFO L125 PetriNetUnfolderBase]: For 707501/707507 co-relation queries the response was YES. [2024-06-21 19:31:02,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84138 conditions, 8173 events. 5312/8173 cut-off events. For 707501/707507 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49159 event pairs, 1570 based on Foata normal form. 8/8178 useless extension candidates. Maximal degree in co-relation 83956. Up to 7613 conditions per place. [2024-06-21 19:31:03,028 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 765 selfloop transitions, 131 changer transitions 0/899 dead transitions. [2024-06-21 19:31:03,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 899 transitions, 21437 flow [2024-06-21 19:31:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:31:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:31:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 19:31:03,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-21 19:31:03,030 INFO L175 Difference]: Start difference. First operand has 376 places, 843 transitions, 18835 flow. Second operand 11 states and 189 transitions. [2024-06-21 19:31:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 899 transitions, 21437 flow [2024-06-21 19:31:05,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 899 transitions, 20770 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 19:31:05,258 INFO L231 Difference]: Finished difference. Result has 381 places, 853 transitions, 18724 flow [2024-06-21 19:31:05,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18168, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18724, PETRI_PLACES=381, PETRI_TRANSITIONS=853} [2024-06-21 19:31:05,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 19:31:05,259 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 853 transitions, 18724 flow [2024-06-21 19:31:05,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:05,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:05,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:05,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:31:05,260 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)] === [2024-06-21 19:31:05,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1976986063, now seen corresponding path program 4 times [2024-06-21 19:31:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:05,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676290528] [2024-06-21 19:31:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676290528] [2024-06-21 19:31:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676290528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:06,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648697546] [2024-06-21 19:31:06,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:06,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:07,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:31:07,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 853 transitions, 18724 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:31:07,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:07,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:31:07,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:10,040 INFO L124 PetriNetUnfolderBase]: 5340/8219 cut-off events. [2024-06-21 19:31:10,041 INFO L125 PetriNetUnfolderBase]: For 724545/724551 co-relation queries the response was YES. [2024-06-21 19:31:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84448 conditions, 8219 events. 5340/8219 cut-off events. For 724545/724551 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 49580 event pairs, 1583 based on Foata normal form. 8/8224 useless extension candidates. Maximal degree in co-relation 84264. Up to 7744 conditions per place. [2024-06-21 19:31:10,168 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 773 selfloop transitions, 124 changer transitions 0/900 dead transitions. [2024-06-21 19:31:10,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 900 transitions, 20956 flow [2024-06-21 19:31:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:31:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:31:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 19:31:10,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 19:31:10,170 INFO L175 Difference]: Start difference. First operand has 381 places, 853 transitions, 18724 flow. Second operand 12 states and 194 transitions. [2024-06-21 19:31:10,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 900 transitions, 20956 flow [2024-06-21 19:31:12,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 900 transitions, 20606 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-21 19:31:12,182 INFO L231 Difference]: Finished difference. Result has 386 places, 857 transitions, 18774 flow [2024-06-21 19:31:12,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18428, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18774, PETRI_PLACES=386, PETRI_TRANSITIONS=857} [2024-06-21 19:31:12,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 19:31:12,183 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 857 transitions, 18774 flow [2024-06-21 19:31:12,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:31:12,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:12,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:31:12,183 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)] === [2024-06-21 19:31:12,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1977193825, now seen corresponding path program 8 times [2024-06-21 19:31:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:12,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616442739] [2024-06-21 19:31:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:13,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:13,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616442739] [2024-06-21 19:31:13,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616442739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:13,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328532040] [2024-06-21 19:31:13,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:13,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:13,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:31:13,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 857 transitions, 18774 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:13,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:13,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:31:13,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:16,683 INFO L124 PetriNetUnfolderBase]: 5532/8539 cut-off events. [2024-06-21 19:31:16,684 INFO L125 PetriNetUnfolderBase]: For 798244/798250 co-relation queries the response was YES. [2024-06-21 19:31:16,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87158 conditions, 8539 events. 5532/8539 cut-off events. For 798244/798250 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52078 event pairs, 1610 based on Foata normal form. 32/8568 useless extension candidates. Maximal degree in co-relation 86971. Up to 7777 conditions per place. [2024-06-21 19:31:16,849 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 785 selfloop transitions, 156 changer transitions 0/944 dead transitions. [2024-06-21 19:31:16,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 944 transitions, 21933 flow [2024-06-21 19:31:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:31:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:31:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 19:31:16,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:31:16,851 INFO L175 Difference]: Start difference. First operand has 386 places, 857 transitions, 18774 flow. Second operand 11 states and 198 transitions. [2024-06-21 19:31:16,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 944 transitions, 21933 flow [2024-06-21 19:31:19,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 944 transitions, 21636 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:31:19,451 INFO L231 Difference]: Finished difference. Result has 390 places, 888 transitions, 19644 flow [2024-06-21 19:31:19,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18498, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19644, PETRI_PLACES=390, PETRI_TRANSITIONS=888} [2024-06-21 19:31:19,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-21 19:31:19,453 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 888 transitions, 19644 flow [2024-06-21 19:31:19,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:19,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:19,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:19,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:31:19,453 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)] === [2024-06-21 19:31:19,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1982550253, now seen corresponding path program 5 times [2024-06-21 19:31:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:19,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558504480] [2024-06-21 19:31:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:19,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:21,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558504480] [2024-06-21 19:31:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558504480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:21,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18394039] [2024-06-21 19:31:21,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:21,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:21,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:31:21,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 888 transitions, 19644 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:31:21,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:21,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:31:21,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:24,075 INFO L124 PetriNetUnfolderBase]: 5519/8511 cut-off events. [2024-06-21 19:31:24,075 INFO L125 PetriNetUnfolderBase]: For 750405/750411 co-relation queries the response was YES. [2024-06-21 19:31:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87272 conditions, 8511 events. 5519/8511 cut-off events. For 750405/750411 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51815 event pairs, 1636 based on Foata normal form. 8/8516 useless extension candidates. Maximal degree in co-relation 87083. Up to 8019 conditions per place. [2024-06-21 19:31:24,204 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 791 selfloop transitions, 130 changer transitions 0/924 dead transitions. [2024-06-21 19:31:24,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 924 transitions, 21758 flow [2024-06-21 19:31:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:31:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:31:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:31:24,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 19:31:24,206 INFO L175 Difference]: Start difference. First operand has 390 places, 888 transitions, 19644 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:31:24,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 924 transitions, 21758 flow [2024-06-21 19:31:26,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 924 transitions, 21546 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 19:31:26,825 INFO L231 Difference]: Finished difference. Result has 394 places, 888 transitions, 19704 flow [2024-06-21 19:31:26,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19432, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19704, PETRI_PLACES=394, PETRI_TRANSITIONS=888} [2024-06-21 19:31:26,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-21 19:31:26,826 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 888 transitions, 19704 flow [2024-06-21 19:31:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:31:26,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:26,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:31:26,827 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)] === [2024-06-21 19:31:26,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1982704075, now seen corresponding path program 9 times [2024-06-21 19:31:26,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:26,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305321329] [2024-06-21 19:31:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:28,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305321329] [2024-06-21 19:31:28,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305321329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:28,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:28,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406423414] [2024-06-21 19:31:28,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:28,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:28,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:31:28,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 888 transitions, 19704 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:28,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:28,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:31:28,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:31,623 INFO L124 PetriNetUnfolderBase]: 5816/9005 cut-off events. [2024-06-21 19:31:31,624 INFO L125 PetriNetUnfolderBase]: For 889749/889755 co-relation queries the response was YES. [2024-06-21 19:31:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92980 conditions, 9005 events. 5816/9005 cut-off events. For 889749/889755 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55696 event pairs, 1660 based on Foata normal form. 26/9028 useless extension candidates. Maximal degree in co-relation 92789. Up to 7704 conditions per place. [2024-06-21 19:31:31,795 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 791 selfloop transitions, 163 changer transitions 0/957 dead transitions. [2024-06-21 19:31:31,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 957 transitions, 22731 flow [2024-06-21 19:31:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:31:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:31:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 19:31:31,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-21 19:31:31,797 INFO L175 Difference]: Start difference. First operand has 394 places, 888 transitions, 19704 flow. Second operand 9 states and 175 transitions. [2024-06-21 19:31:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 957 transitions, 22731 flow [2024-06-21 19:31:34,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 957 transitions, 22457 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:31:34,666 INFO L231 Difference]: Finished difference. Result has 398 places, 900 transitions, 20132 flow [2024-06-21 19:31:34,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19436, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20132, PETRI_PLACES=398, PETRI_TRANSITIONS=900} [2024-06-21 19:31:34,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-21 19:31:34,667 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 900 transitions, 20132 flow [2024-06-21 19:31:34,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:34,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:34,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:31:34,668 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)] === [2024-06-21 19:31:34,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash 764513769, now seen corresponding path program 10 times [2024-06-21 19:31:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:34,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15460914] [2024-06-21 19:31:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15460914] [2024-06-21 19:31:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15460914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:36,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:36,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951927777] [2024-06-21 19:31:36,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:36,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:31:36,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 900 transitions, 20132 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:36,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:36,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:31:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:39,509 INFO L124 PetriNetUnfolderBase]: 5940/9220 cut-off events. [2024-06-21 19:31:39,510 INFO L125 PetriNetUnfolderBase]: For 938688/938694 co-relation queries the response was YES. [2024-06-21 19:31:39,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95495 conditions, 9220 events. 5940/9220 cut-off events. For 938688/938694 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 57693 event pairs, 1766 based on Foata normal form. 32/9249 useless extension candidates. Maximal degree in co-relation 95301. Up to 8463 conditions per place. [2024-06-21 19:31:39,702 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 796 selfloop transitions, 152 changer transitions 0/951 dead transitions. [2024-06-21 19:31:39,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 951 transitions, 22625 flow [2024-06-21 19:31:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:31:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:31:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 19:31:39,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 19:31:39,704 INFO L175 Difference]: Start difference. First operand has 398 places, 900 transitions, 20132 flow. Second operand 9 states and 170 transitions. [2024-06-21 19:31:39,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 951 transitions, 22625 flow [2024-06-21 19:31:42,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 951 transitions, 22453 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 19:31:42,894 INFO L231 Difference]: Finished difference. Result has 404 places, 902 transitions, 20360 flow [2024-06-21 19:31:42,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19968, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20360, PETRI_PLACES=404, PETRI_TRANSITIONS=902} [2024-06-21 19:31:42,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-21 19:31:42,895 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 902 transitions, 20360 flow [2024-06-21 19:31:42,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:42,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:42,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:31:42,895 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:42,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1982700355, now seen corresponding path program 11 times [2024-06-21 19:31:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:42,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658750888] [2024-06-21 19:31:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:42,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:44,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658750888] [2024-06-21 19:31:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658750888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:44,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:44,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:31:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897660574] [2024-06-21 19:31:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:44,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:31:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:31:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:31:44,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:31:44,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 902 transitions, 20360 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:44,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:44,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:31:44,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:47,630 INFO L124 PetriNetUnfolderBase]: 5881/9133 cut-off events. [2024-06-21 19:31:47,630 INFO L125 PetriNetUnfolderBase]: For 881163/881169 co-relation queries the response was YES. [2024-06-21 19:31:47,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93074 conditions, 9133 events. 5881/9133 cut-off events. For 881163/881169 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 57043 event pairs, 1731 based on Foata normal form. 32/9162 useless extension candidates. Maximal degree in co-relation 92878. Up to 8102 conditions per place. [2024-06-21 19:31:47,800 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 738 selfloop transitions, 214 changer transitions 0/955 dead transitions. [2024-06-21 19:31:47,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 955 transitions, 22873 flow [2024-06-21 19:31:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:31:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:31:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 19:31:47,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-21 19:31:47,802 INFO L175 Difference]: Start difference. First operand has 404 places, 902 transitions, 20360 flow. Second operand 9 states and 172 transitions. [2024-06-21 19:31:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 955 transitions, 22873 flow [2024-06-21 19:31:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 955 transitions, 22495 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 19:31:50,750 INFO L231 Difference]: Finished difference. Result has 407 places, 904 transitions, 20502 flow [2024-06-21 19:31:50,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20010, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20502, PETRI_PLACES=407, PETRI_TRANSITIONS=904} [2024-06-21 19:31:50,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 19:31:50,751 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 904 transitions, 20502 flow [2024-06-21 19:31:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 19:31:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:50,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:31:50,752 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:31:50,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash -168575829, now seen corresponding path program 1 times [2024-06-21 19:31:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:50,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438896705] [2024-06-21 19:31:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:50,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:31:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:31:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:31:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438896705] [2024-06-21 19:31:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438896705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:31:52,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:31:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:31:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838978268] [2024-06-21 19:31:52,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:31:52,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:31:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:31:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:31:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:31:52,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:31:52,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 904 transitions, 20502 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:52,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:31:52,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:31:52,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:31:55,678 INFO L124 PetriNetUnfolderBase]: 5764/8975 cut-off events. [2024-06-21 19:31:55,679 INFO L125 PetriNetUnfolderBase]: For 835699/835941 co-relation queries the response was YES. [2024-06-21 19:31:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91595 conditions, 8975 events. 5764/8975 cut-off events. For 835699/835941 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56528 event pairs, 1680 based on Foata normal form. 200/9124 useless extension candidates. Maximal degree in co-relation 91398. Up to 8443 conditions per place. [2024-06-21 19:31:55,863 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 793 selfloop transitions, 86 changer transitions 0/933 dead transitions. [2024-06-21 19:31:55,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 933 transitions, 22667 flow [2024-06-21 19:31:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:31:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:31:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:31:55,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 19:31:55,865 INFO L175 Difference]: Start difference. First operand has 407 places, 904 transitions, 20502 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:31:55,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 933 transitions, 22667 flow [2024-06-21 19:31:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 933 transitions, 22307 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:31:58,961 INFO L231 Difference]: Finished difference. Result has 409 places, 912 transitions, 20479 flow [2024-06-21 19:31:58,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20142, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20479, PETRI_PLACES=409, PETRI_TRANSITIONS=912} [2024-06-21 19:31:58,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-21 19:31:58,962 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 912 transitions, 20479 flow [2024-06-21 19:31:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:31:58,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:31:58,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:31:58,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:31:58,963 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)] === [2024-06-21 19:31:58,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:31:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1802647813, now seen corresponding path program 6 times [2024-06-21 19:31:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:31:58,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891445115] [2024-06-21 19:31:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:31:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:31:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:00,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:00,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891445115] [2024-06-21 19:32:00,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891445115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:00,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:00,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:00,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584475068] [2024-06-21 19:32:00,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:00,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:00,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:00,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:00,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 912 transitions, 20479 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:00,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:00,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:00,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:03,877 INFO L124 PetriNetUnfolderBase]: 5943/9219 cut-off events. [2024-06-21 19:32:03,877 INFO L125 PetriNetUnfolderBase]: For 849159/849162 co-relation queries the response was YES. [2024-06-21 19:32:03,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93649 conditions, 9219 events. 5943/9219 cut-off events. For 849159/849162 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 57621 event pairs, 2077 based on Foata normal form. 6/9222 useless extension candidates. Maximal degree in co-relation 93450. Up to 8462 conditions per place. [2024-06-21 19:32:04,046 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 716 selfloop transitions, 233 changer transitions 0/952 dead transitions. [2024-06-21 19:32:04,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 952 transitions, 22771 flow [2024-06-21 19:32:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:32:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:32:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 19:32:04,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 19:32:04,049 INFO L175 Difference]: Start difference. First operand has 409 places, 912 transitions, 20479 flow. Second operand 10 states and 156 transitions. [2024-06-21 19:32:04,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 952 transitions, 22771 flow [2024-06-21 19:32:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 952 transitions, 22629 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 19:32:06,989 INFO L231 Difference]: Finished difference. Result has 415 places, 920 transitions, 20996 flow [2024-06-21 19:32:06,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20337, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20996, PETRI_PLACES=415, PETRI_TRANSITIONS=920} [2024-06-21 19:32:06,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-21 19:32:06,990 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 920 transitions, 20996 flow [2024-06-21 19:32:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:06,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:06,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:06,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:32:06,991 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)] === [2024-06-21 19:32:06,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1087069167, now seen corresponding path program 7 times [2024-06-21 19:32:06,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:06,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097219826] [2024-06-21 19:32:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:06,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:08,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:08,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097219826] [2024-06-21 19:32:08,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097219826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:08,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:08,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667198627] [2024-06-21 19:32:08,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:08,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:08,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 920 transitions, 20996 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:08,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:08,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:08,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:12,013 INFO L124 PetriNetUnfolderBase]: 5982/9289 cut-off events. [2024-06-21 19:32:12,014 INFO L125 PetriNetUnfolderBase]: For 879555/879558 co-relation queries the response was YES. [2024-06-21 19:32:12,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95123 conditions, 9289 events. 5982/9289 cut-off events. For 879555/879558 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 58234 event pairs, 2105 based on Foata normal form. 6/9292 useless extension candidates. Maximal degree in co-relation 94924. Up to 8751 conditions per place. [2024-06-21 19:32:12,205 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 824 selfloop transitions, 139 changer transitions 0/966 dead transitions. [2024-06-21 19:32:12,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 966 transitions, 23415 flow [2024-06-21 19:32:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:32:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:32:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-21 19:32:12,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37916666666666665 [2024-06-21 19:32:12,206 INFO L175 Difference]: Start difference. First operand has 415 places, 920 transitions, 20996 flow. Second operand 12 states and 182 transitions. [2024-06-21 19:32:12,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 966 transitions, 23415 flow [2024-06-21 19:32:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 966 transitions, 22868 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 19:32:15,228 INFO L231 Difference]: Finished difference. Result has 419 places, 926 transitions, 20912 flow [2024-06-21 19:32:15,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20449, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20912, PETRI_PLACES=419, PETRI_TRANSITIONS=926} [2024-06-21 19:32:15,229 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-21 19:32:15,229 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 926 transitions, 20912 flow [2024-06-21 19:32:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:15,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:15,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:32:15,231 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)] === [2024-06-21 19:32:15,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1950799179, now seen corresponding path program 8 times [2024-06-21 19:32:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727135491] [2024-06-21 19:32:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727135491] [2024-06-21 19:32:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727135491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:16,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:32:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364325185] [2024-06-21 19:32:16,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:32:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:32:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:32:17,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:17,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 926 transitions, 20912 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:17,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:17,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:17,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:20,516 INFO L124 PetriNetUnfolderBase]: 6073/9435 cut-off events. [2024-06-21 19:32:20,516 INFO L125 PetriNetUnfolderBase]: For 920287/920290 co-relation queries the response was YES. [2024-06-21 19:32:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96847 conditions, 9435 events. 6073/9435 cut-off events. For 920287/920290 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59425 event pairs, 2098 based on Foata normal form. 6/9438 useless extension candidates. Maximal degree in co-relation 96647. Up to 8765 conditions per place. [2024-06-21 19:32:20,670 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 823 selfloop transitions, 155 changer transitions 0/981 dead transitions. [2024-06-21 19:32:20,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 981 transitions, 23810 flow [2024-06-21 19:32:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:32:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:32:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-21 19:32:20,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 19:32:20,672 INFO L175 Difference]: Start difference. First operand has 419 places, 926 transitions, 20912 flow. Second operand 12 states and 184 transitions. [2024-06-21 19:32:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 981 transitions, 23810 flow [2024-06-21 19:32:23,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 981 transitions, 23483 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 19:32:23,552 INFO L231 Difference]: Finished difference. Result has 424 places, 938 transitions, 21276 flow [2024-06-21 19:32:23,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20585, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21276, PETRI_PLACES=424, PETRI_TRANSITIONS=938} [2024-06-21 19:32:23,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 19:32:23,554 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 938 transitions, 21276 flow [2024-06-21 19:32:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:23,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:23,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:32:23,555 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)] === [2024-06-21 19:32:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1956370809, now seen corresponding path program 9 times [2024-06-21 19:32:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458180819] [2024-06-21 19:32:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:25,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:25,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458180819] [2024-06-21 19:32:25,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458180819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:25,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:25,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:25,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529827088] [2024-06-21 19:32:25,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:25,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:25,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:25,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 938 transitions, 21276 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:25,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:25,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:28,838 INFO L124 PetriNetUnfolderBase]: 6402/9993 cut-off events. [2024-06-21 19:32:28,839 INFO L125 PetriNetUnfolderBase]: For 1055729/1055732 co-relation queries the response was YES. [2024-06-21 19:32:28,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100571 conditions, 9993 events. 6402/9993 cut-off events. For 1055729/1055732 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 64073 event pairs, 2200 based on Foata normal form. 48/10038 useless extension candidates. Maximal degree in co-relation 100369. Up to 8942 conditions per place. [2024-06-21 19:32:29,041 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 847 selfloop transitions, 151 changer transitions 0/1001 dead transitions. [2024-06-21 19:32:29,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1001 transitions, 24161 flow [2024-06-21 19:32:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:32:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:32:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 19:32:29,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 19:32:29,043 INFO L175 Difference]: Start difference. First operand has 424 places, 938 transitions, 21276 flow. Second operand 11 states and 175 transitions. [2024-06-21 19:32:29,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1001 transitions, 24161 flow [2024-06-21 19:32:32,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1001 transitions, 23785 flow, removed 110 selfloop flow, removed 8 redundant places. [2024-06-21 19:32:32,362 INFO L231 Difference]: Finished difference. Result has 428 places, 956 transitions, 21749 flow [2024-06-21 19:32:32,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=20900, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21749, PETRI_PLACES=428, PETRI_TRANSITIONS=956} [2024-06-21 19:32:32,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 19:32:32,363 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 956 transitions, 21749 flow [2024-06-21 19:32:32,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:32,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:32,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:32:32,364 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:32:32,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 134084971, now seen corresponding path program 2 times [2024-06-21 19:32:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828918949] [2024-06-21 19:32:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:33,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828918949] [2024-06-21 19:32:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828918949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:32:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618493888] [2024-06-21 19:32:33,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:32:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:32:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:32:33,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 19:32:33,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 956 transitions, 21749 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:33,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:33,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 19:32:33,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:36,809 INFO L124 PetriNetUnfolderBase]: 6297/9858 cut-off events. [2024-06-21 19:32:36,809 INFO L125 PetriNetUnfolderBase]: For 962525/962782 co-relation queries the response was YES. [2024-06-21 19:32:36,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99732 conditions, 9858 events. 6297/9858 cut-off events. For 962525/962782 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 63821 event pairs, 2186 based on Foata normal form. 194/9989 useless extension candidates. Maximal degree in co-relation 99527. Up to 9339 conditions per place. [2024-06-21 19:32:37,011 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 850 selfloop transitions, 80 changer transitions 0/984 dead transitions. [2024-06-21 19:32:37,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 984 transitions, 24066 flow [2024-06-21 19:32:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:32:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:32:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:32:37,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 19:32:37,012 INFO L175 Difference]: Start difference. First operand has 428 places, 956 transitions, 21749 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:32:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 984 transitions, 24066 flow [2024-06-21 19:32:41,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 984 transitions, 23723 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 19:32:41,074 INFO L231 Difference]: Finished difference. Result has 428 places, 970 transitions, 21876 flow [2024-06-21 19:32:41,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21406, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21876, PETRI_PLACES=428, PETRI_TRANSITIONS=970} [2024-06-21 19:32:41,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 19:32:41,075 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 970 transitions, 21876 flow [2024-06-21 19:32:41,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:41,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:41,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:41,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:32:41,076 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)] === [2024-06-21 19:32:41,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1490132231, now seen corresponding path program 10 times [2024-06-21 19:32:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729401373] [2024-06-21 19:32:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:41,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:42,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729401373] [2024-06-21 19:32:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729401373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:42,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639178434] [2024-06-21 19:32:42,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:42,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:42,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 970 transitions, 21876 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:42,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:42,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:42,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:46,824 INFO L124 PetriNetUnfolderBase]: 6458/10068 cut-off events. [2024-06-21 19:32:46,825 INFO L125 PetriNetUnfolderBase]: For 973916/973919 co-relation queries the response was YES. [2024-06-21 19:32:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101912 conditions, 10068 events. 6458/10068 cut-off events. For 973916/973919 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64583 event pairs, 2292 based on Foata normal form. 8/10073 useless extension candidates. Maximal degree in co-relation 101705. Up to 9701 conditions per place. [2024-06-21 19:32:47,026 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 943 selfloop transitions, 55 changer transitions 0/1001 dead transitions. [2024-06-21 19:32:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1001 transitions, 24252 flow [2024-06-21 19:32:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 19:32:47,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:32:47,028 INFO L175 Difference]: Start difference. First operand has 428 places, 970 transitions, 21876 flow. Second operand 9 states and 135 transitions. [2024-06-21 19:32:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1001 transitions, 24252 flow [2024-06-21 19:32:50,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1001 transitions, 24163 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 19:32:50,323 INFO L231 Difference]: Finished difference. Result has 435 places, 974 transitions, 22075 flow [2024-06-21 19:32:50,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21787, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22075, PETRI_PLACES=435, PETRI_TRANSITIONS=974} [2024-06-21 19:32:50,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 19:32:50,324 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 974 transitions, 22075 flow [2024-06-21 19:32:50,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:50,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:50,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:50,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:32:50,325 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)] === [2024-06-21 19:32:50,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1490139671, now seen corresponding path program 11 times [2024-06-21 19:32:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:50,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29037589] [2024-06-21 19:32:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29037589] [2024-06-21 19:32:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29037589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:51,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:51,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:32:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845798619] [2024-06-21 19:32:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:32:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:32:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:32:51,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:32:51,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 974 transitions, 22075 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:51,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:51,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:32:51,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:55,948 INFO L124 PetriNetUnfolderBase]: 6531/10186 cut-off events. [2024-06-21 19:32:55,948 INFO L125 PetriNetUnfolderBase]: For 1005368/1005371 co-relation queries the response was YES. [2024-06-21 19:32:56,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103685 conditions, 10186 events. 6531/10186 cut-off events. For 1005368/1005371 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 65557 event pairs, 2295 based on Foata normal form. 8/10191 useless extension candidates. Maximal degree in co-relation 103476. Up to 9825 conditions per place. [2024-06-21 19:32:56,140 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 967 selfloop transitions, 46 changer transitions 0/1016 dead transitions. [2024-06-21 19:32:56,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1016 transitions, 24691 flow [2024-06-21 19:32:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:32:56,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 19:32:56,142 INFO L175 Difference]: Start difference. First operand has 435 places, 974 transitions, 22075 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:32:56,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1016 transitions, 24691 flow [2024-06-21 19:32:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1016 transitions, 24311 flow, removed 138 selfloop flow, removed 7 redundant places. [2024-06-21 19:32:59,748 INFO L231 Difference]: Finished difference. Result has 438 places, 984 transitions, 22167 flow [2024-06-21 19:32:59,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21837, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=928, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22167, PETRI_PLACES=438, PETRI_TRANSITIONS=984} [2024-06-21 19:32:59,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-21 19:32:59,750 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 984 transitions, 22167 flow [2024-06-21 19:32:59,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:32:59,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:59,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:32:59,750 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)] === [2024-06-21 19:32:59,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1557878711, now seen corresponding path program 12 times [2024-06-21 19:32:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237266065] [2024-06-21 19:32:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:01,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237266065] [2024-06-21 19:33:01,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237266065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:01,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:01,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:33:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377308664] [2024-06-21 19:33:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:33:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:33:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:33:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:33:01,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 984 transitions, 22167 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:33:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:33:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:05,272 INFO L124 PetriNetUnfolderBase]: 6559/10233 cut-off events. [2024-06-21 19:33:05,273 INFO L125 PetriNetUnfolderBase]: For 1025278/1025281 co-relation queries the response was YES. [2024-06-21 19:33:05,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103975 conditions, 10233 events. 6559/10233 cut-off events. For 1025278/1025281 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 65949 event pairs, 2287 based on Foata normal form. 8/10238 useless extension candidates. Maximal degree in co-relation 103764. Up to 9921 conditions per place. [2024-06-21 19:33:05,456 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 988 selfloop transitions, 22 changer transitions 0/1013 dead transitions. [2024-06-21 19:33:05,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1013 transitions, 24499 flow [2024-06-21 19:33:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 19:33:05,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-21 19:33:05,458 INFO L175 Difference]: Start difference. First operand has 438 places, 984 transitions, 22167 flow. Second operand 9 states and 133 transitions. [2024-06-21 19:33:05,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1013 transitions, 24499 flow [2024-06-21 19:33:09,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1013 transitions, 24275 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 19:33:09,163 INFO L231 Difference]: Finished difference. Result has 441 places, 988 transitions, 22176 flow [2024-06-21 19:33:09,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21943, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22176, PETRI_PLACES=441, PETRI_TRANSITIONS=988} [2024-06-21 19:33:09,165 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 19:33:09,165 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 988 transitions, 22176 flow [2024-06-21 19:33:09,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:33:09,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:09,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:33:09,165 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)] === [2024-06-21 19:33:09,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1233429694, now seen corresponding path program 1 times [2024-06-21 19:33:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205748599] [2024-06-21 19:33:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:10,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205748599] [2024-06-21 19:33:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205748599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:10,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:33:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040888956] [2024-06-21 19:33:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:33:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:33:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:33:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:33:10,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 988 transitions, 22176 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:33:10,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:10,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:33:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:15,021 INFO L124 PetriNetUnfolderBase]: 6577/10258 cut-off events. [2024-06-21 19:33:15,021 INFO L125 PetriNetUnfolderBase]: For 1035348/1035351 co-relation queries the response was YES. [2024-06-21 19:33:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104237 conditions, 10258 events. 6577/10258 cut-off events. For 1035348/1035351 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 66033 event pairs, 2312 based on Foata normal form. 5/10260 useless extension candidates. Maximal degree in co-relation 104025. Up to 9869 conditions per place. [2024-06-21 19:33:15,229 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 956 selfloop transitions, 63 changer transitions 0/1022 dead transitions. [2024-06-21 19:33:15,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1022 transitions, 24618 flow [2024-06-21 19:33:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:33:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 19:33:15,231 INFO L175 Difference]: Start difference. First operand has 441 places, 988 transitions, 22176 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:33:15,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1022 transitions, 24618 flow [2024-06-21 19:33:18,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1022 transitions, 24425 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:18,968 INFO L231 Difference]: Finished difference. Result has 443 places, 994 transitions, 22298 flow [2024-06-21 19:33:18,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21983, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22298, PETRI_PLACES=443, PETRI_TRANSITIONS=994} [2024-06-21 19:33:18,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 19:33:18,969 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 994 transitions, 22298 flow [2024-06-21 19:33:18,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:33:18,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:18,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:18,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:33:18,969 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)] === [2024-06-21 19:33:18,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1542054645, now seen corresponding path program 12 times [2024-06-21 19:33:18,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:18,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372170619] [2024-06-21 19:33:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:18,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372170619] [2024-06-21 19:33:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372170619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:21,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:33:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587664522] [2024-06-21 19:33:21,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:33:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:33:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:33:21,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 19:33:21,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 994 transitions, 22298 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-21 19:33:21,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:21,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 19:33:21,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:25,398 INFO L124 PetriNetUnfolderBase]: 6815/10665 cut-off events. [2024-06-21 19:33:25,398 INFO L125 PetriNetUnfolderBase]: For 1213948/1213951 co-relation queries the response was YES. [2024-06-21 19:33:25,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109168 conditions, 10665 events. 6815/10665 cut-off events. For 1213948/1213951 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 69533 event pairs, 2318 based on Foata normal form. 24/10686 useless extension candidates. Maximal degree in co-relation 108955. Up to 9556 conditions per place. [2024-06-21 19:33:25,585 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 927 selfloop transitions, 121 changer transitions 0/1051 dead transitions. [2024-06-21 19:33:25,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1051 transitions, 25361 flow [2024-06-21 19:33:25,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:33:25,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 19:33:25,587 INFO L175 Difference]: Start difference. First operand has 443 places, 994 transitions, 22298 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:33:25,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1051 transitions, 25361 flow