./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.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/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:51:07,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:51:07,708 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:51:07,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:51:07,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:51:07,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:51:07,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:51:07,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:51:07,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:51:07,756 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:51:07,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:51:07,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:51:07,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:51:07,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:51:07,757 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:51:07,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:51:07,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:51:07,758 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:51:07,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:51:07,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:51:07,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:51:07,760 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:51:07,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:51:07,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:51:07,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:51:07,761 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:51:07,761 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:51:07,761 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:51:07,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:51:07,762 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:51:07,763 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:51:07,763 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:51:07,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:51:07,764 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:51:07,764 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:51:07,764 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:51:07,764 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:51:07,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:51:07,765 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:51:07,765 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:51:07,765 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:51:07,765 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:51:07,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:51:07,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:51:08,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:51:08,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:51:08,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:51:08,125 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:51:08,125 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:51:08,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-21 18:51:09,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:51:09,605 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:51:09,606 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-21 18:51:09,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c5e7697/3a413b4d95344367a3ad89e19d5088db/FLAG03e3a36ff [2024-06-21 18:51:09,639 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c5e7697/3a413b4d95344367a3ad89e19d5088db [2024-06-21 18:51:09,641 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:51:09,641 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:51:09,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml [2024-06-21 18:51:09,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:51:09,722 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:51:09,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:51:09,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:51:09,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:51:09,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:51:09" (1/2) ... [2024-06-21 18:51:09,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1bffe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:09, skipping insertion in model container [2024-06-21 18:51:09,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:51:09" (1/2) ... [2024-06-21 18:51:09,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cda902b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:51:09, skipping insertion in model container [2024-06-21 18:51:09,731 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:09" (2/2) ... [2024-06-21 18:51:09,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1bffe8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:51:09, skipping insertion in model container [2024-06-21 18:51:09,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:09" (2/2) ... [2024-06-21 18:51:09,733 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:51:09,757 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:51:09,759 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$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_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$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_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_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$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$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$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_p0_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (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_p1_EBX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (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_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$r_buff0_thd1 + (long long )z$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$r_buff1_thd0 + (long long )z$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$read_delayed + (long long )z$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$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$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$read_delayed >= 0LL) && (long long )z$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_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$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$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:51:09,759 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$mem_tmp >= 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$r_buff0_thd1) + (long long )z$w_buff0 >= 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$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 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$read_delayed) + (long long )z$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_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (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$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$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$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )z$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$r_buff1_thd0 >= 0LL) && (long long )z$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$read_delayed >= 0LL) && (long long )z$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_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$w_buff0_used >= 0LL) && (long long )z$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$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$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$read_delayed >= 0LL) && (long long )z$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_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$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$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:51:09,759 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:51:09,759 INFO L106 edCorrectnessWitness]: ghost_update [L818-L818] multithreaded = 1; [2024-06-21 18:51:09,811 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:51:10,189 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:51:10,203 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:51:10,395 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:51:10,442 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:51:10,443 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:51:10 WrapperNode [2024-06-21 18:51:10,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:51:10,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:51:10,444 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:51:10,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:51:10,451 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,470 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,525 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 115 [2024-06-21 18:51:10,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:51:10,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:51:10,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:51:10,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:51:10,536 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,536 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,541 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,581 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 18:51:10,582 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,582 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,599 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,606 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,617 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,621 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:51:10,633 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:51:10,633 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:51:10,633 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:51:10,634 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 06:51:10" (1/1) ... [2024-06-21 18:51:10,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:51:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:51:10,698 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 18:51:10,761 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 18:51:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:51:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:51:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:51:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:51:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:51:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:51:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:51:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:51:10,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:51:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:51:10,787 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 18:51:10,949 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:51:10,951 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:51:11,404 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:51:11,404 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:51:11,606 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:51:11,606 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:51:11,608 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:51:11 BoogieIcfgContainer [2024-06-21 18:51:11,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:51:11,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:51:11,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:51:11,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:51:11,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:51:09" (1/4) ... [2024-06-21 18:51:11,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4053217b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:51:11, skipping insertion in model container [2024-06-21 18:51:11,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:51:09" (2/4) ... [2024-06-21 18:51:11,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4053217b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:51:11, skipping insertion in model container [2024-06-21 18:51:11,615 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 06:51:10" (3/4) ... [2024-06-21 18:51:11,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4053217b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:51:11, skipping insertion in model container [2024-06-21 18:51:11,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:51:11" (4/4) ... [2024-06-21 18:51:11,619 INFO L112 eAbstractionObserver]: Analyzing ICFG mix034_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-21 18:51:11,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:51:11,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 18:51:11,636 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:51:11,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:51:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 18:51:11,756 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 18:51:11,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:51:11,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:51:11,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 18:51:11,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 18:51:11,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:51:11,781 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;@51aee7c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:51:11,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 18:51:11,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:51:11,785 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:51:11,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:51:11,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:11,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:51:11,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:11,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash 332681745, now seen corresponding path program 1 times [2024-06-21 18:51:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224953650] [2024-06-21 18:51:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:13,345 INFO 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 18:51:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:13,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224953650] [2024-06-21 18:51:13,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224953650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:13,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:13,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:51:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311594133] [2024-06-21 18:51:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:13,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:51:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:51:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:51:13,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 18:51:13,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 18:51:13,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:13,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 18:51:13,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:13,622 INFO L124 PetriNetUnfolderBase]: 153/293 cut-off events. [2024-06-21 18:51:13,623 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 18:51:13,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 293 events. 153/293 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1091 event pairs, 89 based on Foata normal form. 1/282 useless extension candidates. Maximal degree in co-relation 575. Up to 272 conditions per place. [2024-06-21 18:51:13,633 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 18:51:13,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-21 18:51:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:51:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:51:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-21 18:51:13,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-21 18:51:13,646 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 56 transitions. [2024-06-21 18:51:13,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-21 18:51:13,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:13,651 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 18:51:13,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 18:51:13,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 18:51:13,656 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 18:51:13,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 18:51:13,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:13,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:13,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:51:13,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1879593136, now seen corresponding path program 1 times [2024-06-21 18:51:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887518150] [2024-06-21 18:51:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:13,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:14,807 INFO 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 18:51:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887518150] [2024-06-21 18:51:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887518150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:14,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:14,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:51:14,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100822264] [2024-06-21 18:51:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:14,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:51:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:51:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:51:14,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 18:51:14,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 18:51:14,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:14,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 18:51:14,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:15,053 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2024-06-21 18:51:15,053 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-21 18:51:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 293 events. 150/293 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1077 event pairs, 68 based on Foata normal form. 2/291 useless extension candidates. Maximal degree in co-relation 649. Up to 258 conditions per place. [2024-06-21 18:51:15,059 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 18:51:15,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 157 flow [2024-06-21 18:51:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:51:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:51:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-06-21 18:51:15,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 18:51:15,064 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 72 transitions. [2024-06-21 18:51:15,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 157 flow [2024-06-21 18:51:15,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:51:15,068 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 18:51:15,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 18:51:15,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 18:51:15,070 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 18:51:15,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 18:51:15,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:15,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:51:15,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:15,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1892209841, now seen corresponding path program 1 times [2024-06-21 18:51:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:15,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62200419] [2024-06-21 18:51:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:16,571 INFO 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 18:51:16,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62200419] [2024-06-21 18:51:16,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62200419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:16,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:16,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576362556] [2024-06-21 18:51:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:16,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:16,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:51:16,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 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 18:51:16,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:16,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:51:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:16,880 INFO L124 PetriNetUnfolderBase]: 180/340 cut-off events. [2024-06-21 18:51:16,880 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-06-21 18:51:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 340 events. 180/340 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1248 event pairs, 52 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 838. Up to 291 conditions per place. [2024-06-21 18:51:16,883 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2024-06-21 18:51:16,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 238 flow [2024-06-21 18:51:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 18:51:16,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-21 18:51:16,888 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 6 states and 99 transitions. [2024-06-21 18:51:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 238 flow [2024-06-21 18:51:16,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 226 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:16,892 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 134 flow [2024-06-21 18:51:16,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-06-21 18:51:16,893 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 18:51:16,893 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 134 flow [2024-06-21 18:51:16,894 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 18:51:16,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:16,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:51:16,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:16,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1968028297, now seen corresponding path program 1 times [2024-06-21 18:51:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171794630] [2024-06-21 18:51:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:18,479 INFO 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 18:51:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171794630] [2024-06-21 18:51:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171794630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000366885] [2024-06-21 18:51:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:51:18,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 18:51:18,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:18,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:51:18,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:18,823 INFO L124 PetriNetUnfolderBase]: 176/330 cut-off events. [2024-06-21 18:51:18,823 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-06-21 18:51:18,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 330 events. 176/330 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 30 based on Foata normal form. 4/326 useless extension candidates. Maximal degree in co-relation 911. Up to 265 conditions per place. [2024-06-21 18:51:18,826 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-06-21 18:51:18,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 258 flow [2024-06-21 18:51:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 18:51:18,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-06-21 18:51:18,829 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 134 flow. Second operand 7 states and 109 transitions. [2024-06-21 18:51:18,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 258 flow [2024-06-21 18:51:18,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:18,831 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 133 flow [2024-06-21 18:51:18,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2024-06-21 18:51:18,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-21 18:51:18,832 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 133 flow [2024-06-21 18:51:18,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 18:51:18,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:18,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:18,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:51:18,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:18,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1341926479, now seen corresponding path program 1 times [2024-06-21 18:51:18,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:18,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281855537] [2024-06-21 18:51:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281855537] [2024-06-21 18:51:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281855537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:20,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:51:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057027516] [2024-06-21 18:51:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:51:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:51:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:51:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:20,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 18:51:20,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:20,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:20,797 INFO L124 PetriNetUnfolderBase]: 174/327 cut-off events. [2024-06-21 18:51:20,797 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-06-21 18:51:20,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 327 events. 174/327 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1153 event pairs, 47 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 950. Up to 304 conditions per place. [2024-06-21 18:51:20,800 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 27 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-21 18:51:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 230 flow [2024-06-21 18:51:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:51:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:51:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-21 18:51:20,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:51:20,802 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 133 flow. Second operand 5 states and 65 transitions. [2024-06-21 18:51:20,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 230 flow [2024-06-21 18:51:20,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 204 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:20,807 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 154 flow [2024-06-21 18:51:20,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-06-21 18:51:20,813 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 18:51:20,813 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 154 flow [2024-06-21 18:51:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 18:51:20,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:20,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:20,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:51:20,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:20,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1349951301, now seen corresponding path program 1 times [2024-06-21 18:51:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:20,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62495179] [2024-06-21 18:51:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62495179] [2024-06-21 18:51:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62495179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:22,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:22,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341300408] [2024-06-21 18:51:22,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:22,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:22,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:22,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:22,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:22,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:23,153 INFO L124 PetriNetUnfolderBase]: 199/357 cut-off events. [2024-06-21 18:51:23,153 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2024-06-21 18:51:23,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 357 events. 199/357 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1231 event pairs, 55 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1110. Up to 343 conditions per place. [2024-06-21 18:51:23,157 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2024-06-21 18:51:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 252 flow [2024-06-21 18:51:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-21 18:51:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 18:51:23,159 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 154 flow. Second operand 6 states and 70 transitions. [2024-06-21 18:51:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 252 flow [2024-06-21 18:51:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 241 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:23,162 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 182 flow [2024-06-21 18:51:23,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-21 18:51:23,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 18:51:23,166 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 182 flow [2024-06-21 18:51:23,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:23,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:23,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:23,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:51:23,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:23,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1924987204, now seen corresponding path program 1 times [2024-06-21 18:51:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:23,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748668474] [2024-06-21 18:51:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:24,587 INFO 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 18:51:24,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748668474] [2024-06-21 18:51:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748668474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:24,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:24,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560996405] [2024-06-21 18:51:24,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:24,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:24,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 182 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 18:51:24,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:24,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:24,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:24,907 INFO L124 PetriNetUnfolderBase]: 197/364 cut-off events. [2024-06-21 18:51:24,907 INFO L125 PetriNetUnfolderBase]: For 1012/1012 co-relation queries the response was YES. [2024-06-21 18:51:24,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 364 events. 197/364 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1271 event pairs, 54 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 1207. Up to 323 conditions per place. [2024-06-21 18:51:24,911 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 13 changer transitions 0/49 dead transitions. [2024-06-21 18:51:24,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 328 flow [2024-06-21 18:51:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-21 18:51:24,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2024-06-21 18:51:24,913 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 182 flow. Second operand 6 states and 79 transitions. [2024-06-21 18:51:24,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 328 flow [2024-06-21 18:51:24,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:24,917 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 234 flow [2024-06-21 18:51:24,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 18:51:24,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-21 18:51:24,918 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 234 flow [2024-06-21 18:51:24,918 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 18:51:24,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:24,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:24,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:51:24,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:24,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1932113794, now seen corresponding path program 2 times [2024-06-21 18:51:24,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:24,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116215243] [2024-06-21 18:51:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:24,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:26,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116215243] [2024-06-21 18:51:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116215243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:26,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264702261] [2024-06-21 18:51:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:26,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:26,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:26,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 234 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 18:51:26,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:26,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:26,522 INFO L124 PetriNetUnfolderBase]: 195/361 cut-off events. [2024-06-21 18:51:26,522 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2024-06-21 18:51:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 361 events. 195/361 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1261 event pairs, 53 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 1294. Up to 329 conditions per place. [2024-06-21 18:51:26,525 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 33 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-21 18:51:26,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 332 flow [2024-06-21 18:51:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-06-21 18:51:26,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:51:26,527 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 234 flow. Second operand 6 states and 75 transitions. [2024-06-21 18:51:26,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 332 flow [2024-06-21 18:51:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 317 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:26,530 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 244 flow [2024-06-21 18:51:26,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-21 18:51:26,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 18:51:26,533 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 244 flow [2024-06-21 18:51:26,533 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 18:51:26,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:26,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:51:26,534 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:26,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash 435595250, now seen corresponding path program 3 times [2024-06-21 18:51:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:26,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407485135] [2024-06-21 18:51:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:28,130 INFO 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 18:51:28,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:28,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407485135] [2024-06-21 18:51:28,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407485135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:28,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:28,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:28,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738717702] [2024-06-21 18:51:28,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:28,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:28,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:28,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:28,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:28,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 244 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 18:51:28,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:28,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:28,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:28,524 INFO L124 PetriNetUnfolderBase]: 193/358 cut-off events. [2024-06-21 18:51:28,524 INFO L125 PetriNetUnfolderBase]: For 1637/1637 co-relation queries the response was YES. [2024-06-21 18:51:28,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 358 events. 193/358 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1250 event pairs, 53 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1329. Up to 309 conditions per place. [2024-06-21 18:51:28,527 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 35 selfloop transitions, 16 changer transitions 0/55 dead transitions. [2024-06-21 18:51:28,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 393 flow [2024-06-21 18:51:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 18:51:28,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 18:51:28,529 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 244 flow. Second operand 6 states and 83 transitions. [2024-06-21 18:51:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 393 flow [2024-06-21 18:51:28,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 374 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:28,535 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 301 flow [2024-06-21 18:51:28,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-21 18:51:28,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-21 18:51:28,537 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 301 flow [2024-06-21 18:51:28,537 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 18:51:28,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:28,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:28,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:51:28,538 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:28,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1931458640, now seen corresponding path program 1 times [2024-06-21 18:51:28,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:28,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102349312] [2024-06-21 18:51:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:30,586 INFO 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 18:51:30,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:30,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102349312] [2024-06-21 18:51:30,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102349312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:30,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:30,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862193738] [2024-06-21 18:51:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:30,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:30,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:30,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:30,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:30,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:31,170 INFO L124 PetriNetUnfolderBase]: 201/363 cut-off events. [2024-06-21 18:51:31,170 INFO L125 PetriNetUnfolderBase]: For 1986/1986 co-relation queries the response was YES. [2024-06-21 18:51:31,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 363 events. 201/363 cut-off events. For 1986/1986 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1220 event pairs, 52 based on Foata normal form. 3/364 useless extension candidates. Maximal degree in co-relation 1435. Up to 339 conditions per place. [2024-06-21 18:51:31,174 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 42 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 18:51:31,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 437 flow [2024-06-21 18:51:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 18:51:31,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-21 18:51:31,176 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 301 flow. Second operand 7 states and 81 transitions. [2024-06-21 18:51:31,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 437 flow [2024-06-21 18:51:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 407 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:51:31,180 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 316 flow [2024-06-21 18:51:31,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=316, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-06-21 18:51:31,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-21 18:51:31,182 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 316 flow [2024-06-21 18:51:31,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:31,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:31,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:31,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:51:31,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:31,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1092172336, now seen corresponding path program 1 times [2024-06-21 18:51:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:31,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698856812] [2024-06-21 18:51:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:32,723 INFO 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 18:51:32,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698856812] [2024-06-21 18:51:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698856812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:32,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874035561] [2024-06-21 18:51:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:32,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 316 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 18:51:32,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:32,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:32,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:33,206 INFO L124 PetriNetUnfolderBase]: 194/362 cut-off events. [2024-06-21 18:51:33,207 INFO L125 PetriNetUnfolderBase]: For 2226/2226 co-relation queries the response was YES. [2024-06-21 18:51:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 362 events. 194/362 cut-off events. For 2226/2226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1260 event pairs, 49 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1476. Up to 322 conditions per place. [2024-06-21 18:51:33,210 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 44 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2024-06-21 18:51:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 472 flow [2024-06-21 18:51:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 18:51:33,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009216589861751 [2024-06-21 18:51:33,212 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 316 flow. Second operand 7 states and 87 transitions. [2024-06-21 18:51:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 472 flow [2024-06-21 18:51:33,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 447 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:33,217 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 353 flow [2024-06-21 18:51:33,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=353, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-06-21 18:51:33,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 18:51:33,218 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 353 flow [2024-06-21 18:51:33,218 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 18:51:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:51:33,219 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1118156792, now seen corresponding path program 2 times [2024-06-21 18:51:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543768529] [2024-06-21 18:51:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:34,651 INFO 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 18:51:34,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:34,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543768529] [2024-06-21 18:51:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543768529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:34,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324127773] [2024-06-21 18:51:34,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:34,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:34,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:34,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 353 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 18:51:34,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:34,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:34,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:34,900 INFO L124 PetriNetUnfolderBase]: 202/375 cut-off events. [2024-06-21 18:51:34,901 INFO L125 PetriNetUnfolderBase]: For 2713/2713 co-relation queries the response was YES. [2024-06-21 18:51:34,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1652 conditions, 375 events. 202/375 cut-off events. For 2713/2713 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1329 event pairs, 51 based on Foata normal form. 1/374 useless extension candidates. Maximal degree in co-relation 1618. Up to 319 conditions per place. [2024-06-21 18:51:34,907 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 19 changer transitions 0/64 dead transitions. [2024-06-21 18:51:34,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 547 flow [2024-06-21 18:51:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 18:51:34,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:51:34,909 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 353 flow. Second operand 7 states and 91 transitions. [2024-06-21 18:51:34,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 547 flow [2024-06-21 18:51:34,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 518 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:34,918 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 403 flow [2024-06-21 18:51:34,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-06-21 18:51:34,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-06-21 18:51:34,919 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 403 flow [2024-06-21 18:51:34,919 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 18:51:34,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:34,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:34,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:51:34,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:34,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1118156606, now seen corresponding path program 1 times [2024-06-21 18:51:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:34,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279382757] [2024-06-21 18:51:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:34,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:36,385 INFO 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 18:51:36,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279382757] [2024-06-21 18:51:36,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279382757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:36,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:36,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65739232] [2024-06-21 18:51:36,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:36,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:36,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:36,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:36,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 403 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:36,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:36,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:36,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:36,665 INFO L124 PetriNetUnfolderBase]: 224/402 cut-off events. [2024-06-21 18:51:36,665 INFO L125 PetriNetUnfolderBase]: For 3316/3316 co-relation queries the response was YES. [2024-06-21 18:51:36,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 402 events. 224/402 cut-off events. For 3316/3316 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1401 event pairs, 54 based on Foata normal form. 1/401 useless extension candidates. Maximal degree in co-relation 1817. Up to 366 conditions per place. [2024-06-21 18:51:36,669 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 49 selfloop transitions, 17 changer transitions 0/68 dead transitions. [2024-06-21 18:51:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 603 flow [2024-06-21 18:51:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-21 18:51:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-21 18:51:36,671 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 403 flow. Second operand 7 states and 85 transitions. [2024-06-21 18:51:36,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 603 flow [2024-06-21 18:51:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 576 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:36,677 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 443 flow [2024-06-21 18:51:36,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-06-21 18:51:36,679 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 18:51:36,680 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 443 flow [2024-06-21 18:51:36,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:36,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:36,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:36,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:51:36,680 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:36,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash -234013906, now seen corresponding path program 3 times [2024-06-21 18:51:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:36,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115169591] [2024-06-21 18:51:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:38,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:38,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115169591] [2024-06-21 18:51:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115169591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348379578] [2024-06-21 18:51:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:38,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:38,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 443 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 18:51:38,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:38,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:38,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:38,362 INFO L124 PetriNetUnfolderBase]: 210/387 cut-off events. [2024-06-21 18:51:38,362 INFO L125 PetriNetUnfolderBase]: For 3827/3827 co-relation queries the response was YES. [2024-06-21 18:51:38,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 387 events. 210/387 cut-off events. For 3827/3827 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1378 event pairs, 50 based on Foata normal form. 1/386 useless extension candidates. Maximal degree in co-relation 1827. Up to 346 conditions per place. [2024-06-21 18:51:38,369 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-06-21 18:51:38,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 577 flow [2024-06-21 18:51:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-21 18:51:38,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-21 18:51:38,370 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 443 flow. Second operand 7 states and 85 transitions. [2024-06-21 18:51:38,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 577 flow [2024-06-21 18:51:38,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 66 transitions, 548 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:38,376 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 443 flow [2024-06-21 18:51:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-06-21 18:51:38,377 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-21 18:51:38,377 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 443 flow [2024-06-21 18:51:38,377 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 18:51:38,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:38,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:38,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:51:38,378 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:38,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1113514976, now seen corresponding path program 2 times [2024-06-21 18:51:38,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:38,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383118329] [2024-06-21 18:51:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:39,636 INFO 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 18:51:39,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:39,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383118329] [2024-06-21 18:51:39,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383118329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:39,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:39,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429031656] [2024-06-21 18:51:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:39,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:39,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:39,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 443 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:39,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:39,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:39,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:39,904 INFO L124 PetriNetUnfolderBase]: 225/404 cut-off events. [2024-06-21 18:51:39,905 INFO L125 PetriNetUnfolderBase]: For 4253/4253 co-relation queries the response was YES. [2024-06-21 18:51:39,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 404 events. 225/404 cut-off events. For 4253/4253 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1408 event pairs, 52 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1945. Up to 378 conditions per place. [2024-06-21 18:51:39,909 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-21 18:51:39,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 69 transitions, 637 flow [2024-06-21 18:51:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 18:51:39,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-21 18:51:39,910 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 443 flow. Second operand 7 states and 82 transitions. [2024-06-21 18:51:39,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 69 transitions, 637 flow [2024-06-21 18:51:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 69 transitions, 604 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:39,918 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 461 flow [2024-06-21 18:51:39,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-21 18:51:39,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 18:51:39,918 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 461 flow [2024-06-21 18:51:39,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:39,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:39,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:39,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:51:39,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:39,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash -223058854, now seen corresponding path program 3 times [2024-06-21 18:51:39,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:39,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932611773] [2024-06-21 18:51:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:39,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:41,031 INFO 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 18:51:41,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:41,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932611773] [2024-06-21 18:51:41,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932611773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:41,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:41,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200461426] [2024-06-21 18:51:41,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:41,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:41,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:41,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:41,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 461 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:41,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:41,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:41,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:41,340 INFO L124 PetriNetUnfolderBase]: 223/401 cut-off events. [2024-06-21 18:51:41,340 INFO L125 PetriNetUnfolderBase]: For 4678/4678 co-relation queries the response was YES. [2024-06-21 18:51:41,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 401 events. 223/401 cut-off events. For 4678/4678 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1398 event pairs, 52 based on Foata normal form. 1/400 useless extension candidates. Maximal degree in co-relation 1958. Up to 382 conditions per place. [2024-06-21 18:51:41,344 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 54 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 18:51:41,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 68 transitions, 607 flow [2024-06-21 18:51:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 18:51:41,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 18:51:41,345 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 461 flow. Second operand 7 states and 79 transitions. [2024-06-21 18:51:41,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 68 transitions, 607 flow [2024-06-21 18:51:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 562 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:41,355 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 445 flow [2024-06-21 18:51:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-06-21 18:51:41,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 18:51:41,356 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 445 flow [2024-06-21 18:51:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:41,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:41,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:41,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:51:41,358 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1916425630, now seen corresponding path program 4 times [2024-06-21 18:51:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:41,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755486538] [2024-06-21 18:51:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:42,667 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 18:51:42,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:42,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755486538] [2024-06-21 18:51:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755486538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:42,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791963267] [2024-06-21 18:51:42,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:42,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:42,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 445 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 18:51:42,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:42,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:42,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:43,059 INFO L124 PetriNetUnfolderBase]: 223/409 cut-off events. [2024-06-21 18:51:43,060 INFO L125 PetriNetUnfolderBase]: For 5470/5470 co-relation queries the response was YES. [2024-06-21 18:51:43,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2074 conditions, 409 events. 223/409 cut-off events. For 5470/5470 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1479 event pairs, 47 based on Foata normal form. 1/408 useless extension candidates. Maximal degree in co-relation 2033. Up to 339 conditions per place. [2024-06-21 18:51:43,064 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 22 changer transitions 0/83 dead transitions. [2024-06-21 18:51:43,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 725 flow [2024-06-21 18:51:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 18:51:43,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 18:51:43,065 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 445 flow. Second operand 8 states and 105 transitions. [2024-06-21 18:51:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 725 flow [2024-06-21 18:51:43,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 696 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:43,075 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 539 flow [2024-06-21 18:51:43,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=539, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-06-21 18:51:43,076 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 18:51:43,076 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 539 flow [2024-06-21 18:51:43,076 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 18:51:43,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:43,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:51:43,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:43,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:43,077 INFO L85 PathProgramCache]: Analyzing trace with hash 591648446, now seen corresponding path program 5 times [2024-06-21 18:51:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:43,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712867831] [2024-06-21 18:51:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:43,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:44,600 INFO 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 18:51:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712867831] [2024-06-21 18:51:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712867831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:44,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:44,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98072032] [2024-06-21 18:51:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:44,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:44,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:44,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 539 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 18:51:44,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:44,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:44,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:45,108 INFO L124 PetriNetUnfolderBase]: 221/406 cut-off events. [2024-06-21 18:51:45,108 INFO L125 PetriNetUnfolderBase]: For 6125/6125 co-relation queries the response was YES. [2024-06-21 18:51:45,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 406 events. 221/406 cut-off events. For 6125/6125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1449 event pairs, 47 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 2115. Up to 343 conditions per place. [2024-06-21 18:51:45,113 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 56 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-06-21 18:51:45,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 728 flow [2024-06-21 18:51:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 18:51:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317972350230416 [2024-06-21 18:51:45,115 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 539 flow. Second operand 7 states and 94 transitions. [2024-06-21 18:51:45,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 728 flow [2024-06-21 18:51:45,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 675 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:45,126 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 538 flow [2024-06-21 18:51:45,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2024-06-21 18:51:45,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-21 18:51:45,127 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 538 flow [2024-06-21 18:51:45,128 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 18:51:45,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:45,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:45,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:51:45,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:45,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 591768416, now seen corresponding path program 6 times [2024-06-21 18:51:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26430359] [2024-06-21 18:51:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:46,608 INFO 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 18:51:46,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26430359] [2024-06-21 18:51:46,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26430359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:46,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:46,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774827] [2024-06-21 18:51:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:46,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:46,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:46,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 538 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 18:51:46,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:46,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:46,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:47,044 INFO L124 PetriNetUnfolderBase]: 219/404 cut-off events. [2024-06-21 18:51:47,044 INFO L125 PetriNetUnfolderBase]: For 6593/6593 co-relation queries the response was YES. [2024-06-21 18:51:47,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 404 events. 219/404 cut-off events. For 6593/6593 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1462 event pairs, 50 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 2115. Up to 313 conditions per place. [2024-06-21 18:51:47,047 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 30 changer transitions 0/82 dead transitions. [2024-06-21 18:51:47,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 82 transitions, 738 flow [2024-06-21 18:51:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 18:51:47,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-21 18:51:47,049 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 538 flow. Second operand 7 states and 96 transitions. [2024-06-21 18:51:47,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 82 transitions, 738 flow [2024-06-21 18:51:47,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 698 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:47,060 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 591 flow [2024-06-21 18:51:47,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=591, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-06-21 18:51:47,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 18:51:47,061 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 591 flow [2024-06-21 18:51:47,061 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 18:51:47,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:47,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:51:47,062 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:47,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash 591768602, now seen corresponding path program 4 times [2024-06-21 18:51:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:47,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146711037] [2024-06-21 18:51:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:47,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:48,380 INFO 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 18:51:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146711037] [2024-06-21 18:51:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146711037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:51:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880594205] [2024-06-21 18:51:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:51:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:51:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:51:48,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:48,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 72 transitions, 591 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:48,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:48,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:48,752 INFO L124 PetriNetUnfolderBase]: 229/412 cut-off events. [2024-06-21 18:51:48,752 INFO L125 PetriNetUnfolderBase]: For 7036/7036 co-relation queries the response was YES. [2024-06-21 18:51:48,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 412 events. 229/412 cut-off events. For 7036/7036 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1446 event pairs, 52 based on Foata normal form. 1/411 useless extension candidates. Maximal degree in co-relation 2222. Up to 364 conditions per place. [2024-06-21 18:51:48,756 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 59 selfloop transitions, 23 changer transitions 0/84 dead transitions. [2024-06-21 18:51:48,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 84 transitions, 797 flow [2024-06-21 18:51:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:51:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:51:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 18:51:48,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 18:51:48,758 INFO L175 Difference]: Start difference. First operand has 89 places, 72 transitions, 591 flow. Second operand 7 states and 89 transitions. [2024-06-21 18:51:48,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 84 transitions, 797 flow [2024-06-21 18:51:48,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 84 transitions, 720 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:48,770 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 585 flow [2024-06-21 18:51:48,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-06-21 18:51:48,771 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 18:51:48,771 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 585 flow [2024-06-21 18:51:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:48,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:48,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:48,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:51:48,772 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:48,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 467834253, now seen corresponding path program 1 times [2024-06-21 18:51:48,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:48,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922395735] [2024-06-21 18:51:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:48,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:50,531 INFO 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 18:51:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:50,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922395735] [2024-06-21 18:51:50,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922395735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:50,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068811239] [2024-06-21 18:51:50,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:50,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:50,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:50,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 585 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 18:51:50,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:50,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:50,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:51,111 INFO L124 PetriNetUnfolderBase]: 229/422 cut-off events. [2024-06-21 18:51:51,112 INFO L125 PetriNetUnfolderBase]: For 8011/8011 co-relation queries the response was YES. [2024-06-21 18:51:51,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 422 events. 229/422 cut-off events. For 8011/8011 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1562 event pairs, 53 based on Foata normal form. 1/421 useless extension candidates. Maximal degree in co-relation 2309. Up to 363 conditions per place. [2024-06-21 18:51:51,120 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-21 18:51:51,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 875 flow [2024-06-21 18:51:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:51:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:51:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 18:51:51,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 18:51:51,127 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 585 flow. Second operand 10 states and 117 transitions. [2024-06-21 18:51:51,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 875 flow [2024-06-21 18:51:51,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 820 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:51,143 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 635 flow [2024-06-21 18:51:51,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=635, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2024-06-21 18:51:51,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-21 18:51:51,144 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 635 flow [2024-06-21 18:51:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 18:51:51,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:51,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:51,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:51:51,145 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:51,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash -306840599, now seen corresponding path program 2 times [2024-06-21 18:51:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:51,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797463485] [2024-06-21 18:51:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:52,810 INFO 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 18:51:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:52,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797463485] [2024-06-21 18:51:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797463485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173536817] [2024-06-21 18:51:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 635 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 18:51:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:53,225 INFO L124 PetriNetUnfolderBase]: 227/418 cut-off events. [2024-06-21 18:51:53,225 INFO L125 PetriNetUnfolderBase]: For 8541/8541 co-relation queries the response was YES. [2024-06-21 18:51:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 418 events. 227/418 cut-off events. For 8541/8541 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1541 event pairs, 53 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2335. Up to 369 conditions per place. [2024-06-21 18:51:53,229 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-21 18:51:53,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 821 flow [2024-06-21 18:51:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 18:51:53,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 18:51:53,231 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 635 flow. Second operand 8 states and 97 transitions. [2024-06-21 18:51:53,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 821 flow [2024-06-21 18:51:53,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 774 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:53,241 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 621 flow [2024-06-21 18:51:53,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2024-06-21 18:51:53,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 18:51:53,241 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 621 flow [2024-06-21 18:51:53,242 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 18:51:53,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:53,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:53,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:51:53,242 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:53,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash -306840444, now seen corresponding path program 1 times [2024-06-21 18:51:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:53,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541145085] [2024-06-21 18:51:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:54,435 INFO 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 18:51:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:54,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541145085] [2024-06-21 18:51:54,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541145085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:54,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165625201] [2024-06-21 18:51:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:54,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:54,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:54,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 621 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:54,818 INFO L124 PetriNetUnfolderBase]: 242/435 cut-off events. [2024-06-21 18:51:54,818 INFO L125 PetriNetUnfolderBase]: For 9245/9245 co-relation queries the response was YES. [2024-06-21 18:51:54,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 435 events. 242/435 cut-off events. For 9245/9245 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1573 event pairs, 54 based on Foata normal form. 1/434 useless extension candidates. Maximal degree in co-relation 2446. Up to 408 conditions per place. [2024-06-21 18:51:54,822 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 75 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-21 18:51:54,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 91 transitions, 843 flow [2024-06-21 18:51:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 18:51:54,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 18:51:54,823 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 621 flow. Second operand 8 states and 90 transitions. [2024-06-21 18:51:54,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 91 transitions, 843 flow [2024-06-21 18:51:54,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 91 transitions, 816 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:54,836 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 651 flow [2024-06-21 18:51:54,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=651, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2024-06-21 18:51:54,836 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 18:51:54,836 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 651 flow [2024-06-21 18:51:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:54,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:54,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:54,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:51:54,837 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:54,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 471643688, now seen corresponding path program 2 times [2024-06-21 18:51:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222679218] [2024-06-21 18:51:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:56,134 INFO 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 18:51:56,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:56,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222679218] [2024-06-21 18:51:56,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222679218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:56,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:56,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:56,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704019629] [2024-06-21 18:51:56,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:56,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:56,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:56,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 651 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:56,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:56,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:56,453 INFO L124 PetriNetUnfolderBase]: 255/456 cut-off events. [2024-06-21 18:51:56,453 INFO L125 PetriNetUnfolderBase]: For 10678/10678 co-relation queries the response was YES. [2024-06-21 18:51:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2734 conditions, 456 events. 255/456 cut-off events. For 10678/10678 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1676 event pairs, 57 based on Foata normal form. 1/455 useless extension candidates. Maximal degree in co-relation 2682. Up to 387 conditions per place. [2024-06-21 18:51:56,457 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2024-06-21 18:51:56,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 98 transitions, 1031 flow [2024-06-21 18:51:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 18:51:56,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-21 18:51:56,458 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 651 flow. Second operand 8 states and 99 transitions. [2024-06-21 18:51:56,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 98 transitions, 1031 flow [2024-06-21 18:51:56,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 990 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:56,473 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 747 flow [2024-06-21 18:51:56,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2024-06-21 18:51:56,474 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-06-21 18:51:56,474 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 747 flow [2024-06-21 18:51:56,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:56,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:56,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:51:56,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:56,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 471643533, now seen corresponding path program 3 times [2024-06-21 18:51:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282836243] [2024-06-21 18:51:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:56,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:57,737 INFO 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 18:51:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:57,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282836243] [2024-06-21 18:51:57,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282836243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:57,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:57,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451721847] [2024-06-21 18:51:57,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:57,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:57,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:57,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:51:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 747 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 18:51:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:57,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:51:57,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:58,005 INFO L124 PetriNetUnfolderBase]: 248/451 cut-off events. [2024-06-21 18:51:58,006 INFO L125 PetriNetUnfolderBase]: For 11950/11950 co-relation queries the response was YES. [2024-06-21 18:51:58,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 451 events. 248/451 cut-off events. For 11950/11950 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1688 event pairs, 54 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 2743. Up to 377 conditions per place. [2024-06-21 18:51:58,010 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 65 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-21 18:51:58,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 98 transitions, 963 flow [2024-06-21 18:51:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 18:51:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:51:58,011 INFO L175 Difference]: Start difference. First operand has 103 places, 88 transitions, 747 flow. Second operand 8 states and 100 transitions. [2024-06-21 18:51:58,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 98 transitions, 963 flow [2024-06-21 18:51:58,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 921 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:58,033 INFO L231 Difference]: Finished difference. Result has 108 places, 90 transitions, 780 flow [2024-06-21 18:51:58,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=780, PETRI_PLACES=108, PETRI_TRANSITIONS=90} [2024-06-21 18:51:58,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-21 18:51:58,033 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 90 transitions, 780 flow [2024-06-21 18:51:58,034 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 18:51:58,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:58,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:51:58,034 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:58,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 471649485, now seen corresponding path program 1 times [2024-06-21 18:51:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329597504] [2024-06-21 18:51:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:59,126 INFO 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 18:51:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329597504] [2024-06-21 18:51:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329597504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:51:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84754503] [2024-06-21 18:51:59,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:51:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:51:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:51:59,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:51:59,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 90 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:59,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:59,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:51:59,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:59,471 INFO L124 PetriNetUnfolderBase]: 282/500 cut-off events. [2024-06-21 18:51:59,471 INFO L125 PetriNetUnfolderBase]: For 14333/14333 co-relation queries the response was YES. [2024-06-21 18:51:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3165 conditions, 500 events. 282/500 cut-off events. For 14333/14333 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1884 event pairs, 61 based on Foata normal form. 3/501 useless extension candidates. Maximal degree in co-relation 3110. Up to 433 conditions per place. [2024-06-21 18:51:59,477 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-21 18:51:59,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 109 transitions, 1116 flow [2024-06-21 18:51:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:51:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:51:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 18:51:59,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:51:59,481 INFO L175 Difference]: Start difference. First operand has 108 places, 90 transitions, 780 flow. Second operand 8 states and 100 transitions. [2024-06-21 18:51:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 109 transitions, 1116 flow [2024-06-21 18:51:59,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 1057 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:59,508 INFO L231 Difference]: Finished difference. Result has 111 places, 96 transitions, 828 flow [2024-06-21 18:51:59,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=828, PETRI_PLACES=111, PETRI_TRANSITIONS=96} [2024-06-21 18:51:59,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 18:51:59,508 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 96 transitions, 828 flow [2024-06-21 18:51:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:51:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:59,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:51:59,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:51:59,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 471649268, now seen corresponding path program 3 times [2024-06-21 18:51:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:59,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639546347] [2024-06-21 18:51:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:00,628 INFO 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 18:52:00,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:00,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639546347] [2024-06-21 18:52:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639546347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:00,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390684617] [2024-06-21 18:52:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:00,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:00,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:00,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 96 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:00,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:00,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:00,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:00,980 INFO L124 PetriNetUnfolderBase]: 280/497 cut-off events. [2024-06-21 18:52:00,981 INFO L125 PetriNetUnfolderBase]: For 14353/14353 co-relation queries the response was YES. [2024-06-21 18:52:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 497 events. 280/497 cut-off events. For 14353/14353 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1870 event pairs, 60 based on Foata normal form. 1/496 useless extension candidates. Maximal degree in co-relation 3176. Up to 429 conditions per place. [2024-06-21 18:52:00,994 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 29 changer transitions 0/105 dead transitions. [2024-06-21 18:52:00,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 105 transitions, 1108 flow [2024-06-21 18:52:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 18:52:00,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 18:52:00,995 INFO L175 Difference]: Start difference. First operand has 111 places, 96 transitions, 828 flow. Second operand 8 states and 97 transitions. [2024-06-21 18:52:00,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 105 transitions, 1108 flow [2024-06-21 18:52:01,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 1073 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 18:52:01,019 INFO L231 Difference]: Finished difference. Result has 116 places, 96 transitions, 856 flow [2024-06-21 18:52:01,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=856, PETRI_PLACES=116, PETRI_TRANSITIONS=96} [2024-06-21 18:52:01,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 18:52:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 96 transitions, 856 flow [2024-06-21 18:52:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:01,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:01,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:52:01,021 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 705899183, now seen corresponding path program 2 times [2024-06-21 18:52:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:01,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480184795] [2024-06-21 18:52:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480184795] [2024-06-21 18:52:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480184795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:01,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:01,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065492462] [2024-06-21 18:52:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:01,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:01,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:02,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:02,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 96 transitions, 856 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:02,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:02,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:02,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:02,332 INFO L124 PetriNetUnfolderBase]: 289/512 cut-off events. [2024-06-21 18:52:02,332 INFO L125 PetriNetUnfolderBase]: For 16213/16213 co-relation queries the response was YES. [2024-06-21 18:52:02,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 512 events. 289/512 cut-off events. For 16213/16213 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1929 event pairs, 58 based on Foata normal form. 3/513 useless extension candidates. Maximal degree in co-relation 3297. Up to 483 conditions per place. [2024-06-21 18:52:02,338 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-06-21 18:52:02,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 1108 flow [2024-06-21 18:52:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 18:52:02,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 18:52:02,339 INFO L175 Difference]: Start difference. First operand has 116 places, 96 transitions, 856 flow. Second operand 8 states and 90 transitions. [2024-06-21 18:52:02,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 1108 flow [2024-06-21 18:52:02,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 107 transitions, 1045 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:02,368 INFO L231 Difference]: Finished difference. Result has 117 places, 98 transitions, 850 flow [2024-06-21 18:52:02,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=850, PETRI_PLACES=117, PETRI_TRANSITIONS=98} [2024-06-21 18:52:02,368 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-21 18:52:02,369 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 850 flow [2024-06-21 18:52:02,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:02,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:02,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:02,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:52:02,369 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:02,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1675110959, now seen corresponding path program 3 times [2024-06-21 18:52:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:02,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50255273] [2024-06-21 18:52:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:02,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:03,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50255273] [2024-06-21 18:52:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50255273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:03,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:03,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042438516] [2024-06-21 18:52:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:03,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:03,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:03,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 98 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:03,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:03,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:03,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:03,859 INFO L124 PetriNetUnfolderBase]: 298/527 cut-off events. [2024-06-21 18:52:03,859 INFO L125 PetriNetUnfolderBase]: For 17540/17540 co-relation queries the response was YES. [2024-06-21 18:52:03,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 527 events. 298/527 cut-off events. For 17540/17540 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2004 event pairs, 58 based on Foata normal form. 3/528 useless extension candidates. Maximal degree in co-relation 3402. Up to 486 conditions per place. [2024-06-21 18:52:03,862 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-21 18:52:03,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 111 transitions, 1120 flow [2024-06-21 18:52:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 18:52:03,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 18:52:03,864 INFO L175 Difference]: Start difference. First operand has 117 places, 98 transitions, 850 flow. Second operand 8 states and 94 transitions. [2024-06-21 18:52:03,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 111 transitions, 1120 flow [2024-06-21 18:52:03,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 1074 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:03,885 INFO L231 Difference]: Finished difference. Result has 119 places, 100 transitions, 871 flow [2024-06-21 18:52:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=119, PETRI_TRANSITIONS=100} [2024-06-21 18:52:03,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-21 18:52:03,886 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 100 transitions, 871 flow [2024-06-21 18:52:03,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:03,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:52:03,887 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:03,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1667753512, now seen corresponding path program 4 times [2024-06-21 18:52:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:03,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751486162] [2024-06-21 18:52:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:04,989 INFO 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 18:52:04,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:04,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751486162] [2024-06-21 18:52:04,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751486162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:04,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:04,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189267296] [2024-06-21 18:52:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:05,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:05,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 100 transitions, 871 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:05,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:05,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:05,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:05,263 INFO L124 PetriNetUnfolderBase]: 301/532 cut-off events. [2024-06-21 18:52:05,265 INFO L125 PetriNetUnfolderBase]: For 17832/17832 co-relation queries the response was YES. [2024-06-21 18:52:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3533 conditions, 532 events. 301/532 cut-off events. For 17832/17832 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2027 event pairs, 58 based on Foata normal form. 1/531 useless extension candidates. Maximal degree in co-relation 3471. Up to 494 conditions per place. [2024-06-21 18:52:05,270 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 88 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-21 18:52:05,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 1191 flow [2024-06-21 18:52:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 18:52:05,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:52:05,272 INFO L175 Difference]: Start difference. First operand has 119 places, 100 transitions, 871 flow. Second operand 8 states and 92 transitions. [2024-06-21 18:52:05,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 1191 flow [2024-06-21 18:52:05,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 110 transitions, 1144 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:05,302 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 897 flow [2024-06-21 18:52:05,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=897, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2024-06-21 18:52:05,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 18:52:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 897 flow [2024-06-21 18:52:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:05,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:05,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:05,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:52:05,304 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:05,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1667960902, now seen corresponding path program 5 times [2024-06-21 18:52:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:05,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826772457] [2024-06-21 18:52:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:06,357 INFO 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 18:52:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:06,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826772457] [2024-06-21 18:52:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826772457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:06,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:06,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:06,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81487423] [2024-06-21 18:52:06,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:06,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:06,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:06,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 897 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:06,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:06,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:06,702 INFO L124 PetriNetUnfolderBase]: 304/537 cut-off events. [2024-06-21 18:52:06,702 INFO L125 PetriNetUnfolderBase]: For 18842/18842 co-relation queries the response was YES. [2024-06-21 18:52:06,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3576 conditions, 537 events. 304/537 cut-off events. For 18842/18842 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2051 event pairs, 58 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 3513. Up to 514 conditions per place. [2024-06-21 18:52:06,705 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-21 18:52:06,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 111 transitions, 1163 flow [2024-06-21 18:52:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 18:52:06,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:52:06,709 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 897 flow. Second operand 8 states and 88 transitions. [2024-06-21 18:52:06,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 111 transitions, 1163 flow [2024-06-21 18:52:06,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 111 transitions, 1088 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:06,738 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 891 flow [2024-06-21 18:52:06,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-06-21 18:52:06,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-21 18:52:06,739 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 891 flow [2024-06-21 18:52:06,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:06,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:06,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:52:06,739 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:06,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1667759309, now seen corresponding path program 4 times [2024-06-21 18:52:06,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540058390] [2024-06-21 18:52:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:06,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540058390] [2024-06-21 18:52:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540058390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:07,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553636704] [2024-06-21 18:52:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:07,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:07,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 891 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:07,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:07,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:07,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:08,200 INFO L124 PetriNetUnfolderBase]: 298/528 cut-off events. [2024-06-21 18:52:08,200 INFO L125 PetriNetUnfolderBase]: For 19370/19370 co-relation queries the response was YES. [2024-06-21 18:52:08,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3438 conditions, 528 events. 298/528 cut-off events. For 19370/19370 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2021 event pairs, 56 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 3374. Up to 472 conditions per place. [2024-06-21 18:52:08,204 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 21 changer transitions 0/115 dead transitions. [2024-06-21 18:52:08,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 115 transitions, 1145 flow [2024-06-21 18:52:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 18:52:08,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:52:08,209 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 891 flow. Second operand 8 states and 96 transitions. [2024-06-21 18:52:08,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 115 transitions, 1145 flow [2024-06-21 18:52:08,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 115 transitions, 1098 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:08,245 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 891 flow [2024-06-21 18:52:08,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2024-06-21 18:52:08,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-21 18:52:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 891 flow [2024-06-21 18:52:08,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:08,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:08,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:52:08,246 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:08,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1667753357, now seen corresponding path program 4 times [2024-06-21 18:52:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:08,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676606479] [2024-06-21 18:52:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:09,544 INFO 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 18:52:09,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:09,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676606479] [2024-06-21 18:52:09,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676606479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:09,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910518250] [2024-06-21 18:52:09,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:09,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:09,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:09,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:09,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 18:52:09,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:09,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:09,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:09,912 INFO L124 PetriNetUnfolderBase]: 288/520 cut-off events. [2024-06-21 18:52:09,912 INFO L125 PetriNetUnfolderBase]: For 19744/19744 co-relation queries the response was YES. [2024-06-21 18:52:09,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 520 events. 288/520 cut-off events. For 19744/19744 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2037 event pairs, 54 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 3382. Up to 462 conditions per place. [2024-06-21 18:52:09,917 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 85 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-06-21 18:52:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 113 transitions, 1133 flow [2024-06-21 18:52:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 18:52:09,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:52:09,919 INFO L175 Difference]: Start difference. First operand has 125 places, 104 transitions, 891 flow. Second operand 9 states and 102 transitions. [2024-06-21 18:52:09,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 113 transitions, 1133 flow [2024-06-21 18:52:09,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 113 transitions, 1065 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:09,958 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 888 flow [2024-06-21 18:52:09,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=888, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2024-06-21 18:52:09,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 18:52:09,958 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 888 flow [2024-06-21 18:52:09,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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 18:52:09,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:09,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:52:09,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:09,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1667759092, now seen corresponding path program 6 times [2024-06-21 18:52:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:09,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410202597] [2024-06-21 18:52:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:11,026 INFO 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 18:52:11,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:11,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410202597] [2024-06-21 18:52:11,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410202597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:11,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:11,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:11,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390426306] [2024-06-21 18:52:11,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 888 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:11,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:11,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:11,333 INFO L124 PetriNetUnfolderBase]: 299/530 cut-off events. [2024-06-21 18:52:11,334 INFO L125 PetriNetUnfolderBase]: For 19992/19992 co-relation queries the response was YES. [2024-06-21 18:52:11,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 530 events. 299/530 cut-off events. For 19992/19992 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2046 event pairs, 57 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 3400. Up to 492 conditions per place. [2024-06-21 18:52:11,337 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-21 18:52:11,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 113 transitions, 1126 flow [2024-06-21 18:52:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 18:52:11,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:52:11,338 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 888 flow. Second operand 8 states and 92 transitions. [2024-06-21 18:52:11,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 113 transitions, 1126 flow [2024-06-21 18:52:11,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 113 transitions, 1063 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:11,365 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 872 flow [2024-06-21 18:52:11,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=872, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2024-06-21 18:52:11,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 18:52:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 872 flow [2024-06-21 18:52:11,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:11,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:11,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:52:11,366 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:11,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1465030835, now seen corresponding path program 5 times [2024-06-21 18:52:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688483194] [2024-06-21 18:52:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:12,511 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 18:52:12,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688483194] [2024-06-21 18:52:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688483194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:12,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:52:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502681613] [2024-06-21 18:52:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:52:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:52:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:52:12,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:12,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 872 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 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 18:52:12,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:12,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:12,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:12,928 INFO L124 PetriNetUnfolderBase]: 297/537 cut-off events. [2024-06-21 18:52:12,928 INFO L125 PetriNetUnfolderBase]: For 21987/21987 co-relation queries the response was YES. [2024-06-21 18:52:12,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 537 events. 297/537 cut-off events. For 21987/21987 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2130 event pairs, 45 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 3502. Up to 420 conditions per place. [2024-06-21 18:52:12,931 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 79 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-21 18:52:12,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 127 transitions, 1288 flow [2024-06-21 18:52:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:52:12,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:52:12,932 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 872 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:52:12,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 127 transitions, 1288 flow [2024-06-21 18:52:12,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 127 transitions, 1234 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:12,960 INFO L231 Difference]: Finished difference. Result has 131 places, 113 transitions, 998 flow [2024-06-21 18:52:12,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=131, PETRI_TRANSITIONS=113} [2024-06-21 18:52:12,960 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 18:52:12,960 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 113 transitions, 998 flow [2024-06-21 18:52:12,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 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 18:52:12,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:12,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:12,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:52:12,961 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:12,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1111862079, now seen corresponding path program 6 times [2024-06-21 18:52:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:12,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962092868] [2024-06-21 18:52:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:14,574 INFO 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 18:52:14,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:14,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962092868] [2024-06-21 18:52:14,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962092868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:14,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949368543] [2024-06-21 18:52:14,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:14,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:14,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:52:14,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 113 transitions, 998 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 18:52:14,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:14,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:52:14,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:14,934 INFO L124 PetriNetUnfolderBase]: 300/541 cut-off events. [2024-06-21 18:52:14,935 INFO L125 PetriNetUnfolderBase]: For 23512/23512 co-relation queries the response was YES. [2024-06-21 18:52:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 541 events. 300/541 cut-off events. For 23512/23512 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2145 event pairs, 45 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 3659. Up to 424 conditions per place. [2024-06-21 18:52:14,938 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 77 selfloop transitions, 39 changer transitions 0/130 dead transitions. [2024-06-21 18:52:14,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 130 transitions, 1374 flow [2024-06-21 18:52:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 18:52:14,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:52:14,939 INFO L175 Difference]: Start difference. First operand has 131 places, 113 transitions, 998 flow. Second operand 9 states and 124 transitions. [2024-06-21 18:52:14,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 130 transitions, 1374 flow [2024-06-21 18:52:14,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 130 transitions, 1310 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 18:52:14,973 INFO L231 Difference]: Finished difference. Result has 136 places, 115 transitions, 1061 flow [2024-06-21 18:52:14,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1061, PETRI_PLACES=136, PETRI_TRANSITIONS=115} [2024-06-21 18:52:14,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 18:52:14,974 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 115 transitions, 1061 flow [2024-06-21 18:52:14,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 18:52:14,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:14,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:14,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:52:14,975 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:14,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -720317974, now seen corresponding path program 7 times [2024-06-21 18:52:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:14,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134514933] [2024-06-21 18:52:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:16,435 INFO 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 18:52:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:16,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134514933] [2024-06-21 18:52:16,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134514933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:16,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:16,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:16,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782350376] [2024-06-21 18:52:16,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:16,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:16,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:16,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:16,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 115 transitions, 1061 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:16,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:16,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:16,932 INFO L124 PetriNetUnfolderBase]: 322/568 cut-off events. [2024-06-21 18:52:16,932 INFO L125 PetriNetUnfolderBase]: For 23866/23866 co-relation queries the response was YES. [2024-06-21 18:52:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 568 events. 322/568 cut-off events. For 23866/23866 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2222 event pairs, 49 based on Foata normal form. 1/567 useless extension candidates. Maximal degree in co-relation 3876. Up to 511 conditions per place. [2024-06-21 18:52:16,937 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 105 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-21 18:52:16,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 1489 flow [2024-06-21 18:52:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 18:52:16,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:52:16,938 INFO L175 Difference]: Start difference. First operand has 136 places, 115 transitions, 1061 flow. Second operand 9 states and 108 transitions. [2024-06-21 18:52:16,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 1489 flow [2024-06-21 18:52:16,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 134 transitions, 1402 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:16,991 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 1095 flow [2024-06-21 18:52:16,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1095, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2024-06-21 18:52:16,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-21 18:52:16,992 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 1095 flow [2024-06-21 18:52:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:16,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:16,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:16,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:52:16,992 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -720322779, now seen corresponding path program 7 times [2024-06-21 18:52:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8696742] [2024-06-21 18:52:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:18,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:18,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8696742] [2024-06-21 18:52:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8696742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:18,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:18,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666513896] [2024-06-21 18:52:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:18,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:52:18,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 1095 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 18:52:18,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:18,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:52:18,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:18,634 INFO L124 PetriNetUnfolderBase]: 306/551 cut-off events. [2024-06-21 18:52:18,634 INFO L125 PetriNetUnfolderBase]: For 23529/23529 co-relation queries the response was YES. [2024-06-21 18:52:18,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3805 conditions, 551 events. 306/551 cut-off events. For 23529/23529 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2209 event pairs, 47 based on Foata normal form. 1/550 useless extension candidates. Maximal degree in co-relation 3736. Up to 458 conditions per place. [2024-06-21 18:52:18,639 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 87 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-21 18:52:18,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 130 transitions, 1351 flow [2024-06-21 18:52:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 18:52:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:52:18,640 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 1095 flow. Second operand 8 states and 108 transitions. [2024-06-21 18:52:18,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 130 transitions, 1351 flow [2024-06-21 18:52:18,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 130 transitions, 1281 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:18,695 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1088 flow [2024-06-21 18:52:18,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1088, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2024-06-21 18:52:18,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 18:52:18,696 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1088 flow [2024-06-21 18:52:18,696 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 18:52:18,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:18,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:18,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:52:18,697 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:18,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1161233452, now seen corresponding path program 8 times [2024-06-21 18:52:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:18,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268674596] [2024-06-21 18:52:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:20,495 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 18:52:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268674596] [2024-06-21 18:52:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268674596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:20,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:20,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910832887] [2024-06-21 18:52:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:20,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:20,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:20,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:20,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:20,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:20,887 INFO L124 PetriNetUnfolderBase]: 318/562 cut-off events. [2024-06-21 18:52:20,887 INFO L125 PetriNetUnfolderBase]: For 23781/23781 co-relation queries the response was YES. [2024-06-21 18:52:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 562 events. 318/562 cut-off events. For 23781/23781 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2205 event pairs, 48 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 3800. Up to 518 conditions per place. [2024-06-21 18:52:20,892 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 109 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-21 18:52:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 131 transitions, 1378 flow [2024-06-21 18:52:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 18:52:20,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 18:52:20,893 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1088 flow. Second operand 8 states and 97 transitions. [2024-06-21 18:52:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 131 transitions, 1378 flow [2024-06-21 18:52:20,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 1301 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:20,933 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1056 flow [2024-06-21 18:52:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1056, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2024-06-21 18:52:20,933 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 18:52:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1056 flow [2024-06-21 18:52:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:20,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:20,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:20,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:52:20,934 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:20,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1164958319, now seen corresponding path program 5 times [2024-06-21 18:52:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229613898] [2024-06-21 18:52:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:22,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:22,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229613898] [2024-06-21 18:52:22,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229613898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:22,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:22,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:22,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907049050] [2024-06-21 18:52:22,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:22,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:22,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1056 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:22,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:22,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:22,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:23,048 INFO L124 PetriNetUnfolderBase]: 316/559 cut-off events. [2024-06-21 18:52:23,048 INFO L125 PetriNetUnfolderBase]: For 23124/23124 co-relation queries the response was YES. [2024-06-21 18:52:23,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3788 conditions, 559 events. 316/559 cut-off events. For 23124/23124 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2199 event pairs, 57 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 3717. Up to 492 conditions per place. [2024-06-21 18:52:23,053 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 106 selfloop transitions, 29 changer transitions 0/137 dead transitions. [2024-06-21 18:52:23,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 137 transitions, 1396 flow [2024-06-21 18:52:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 18:52:23,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 18:52:23,057 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1056 flow. Second operand 9 states and 106 transitions. [2024-06-21 18:52:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 137 transitions, 1396 flow [2024-06-21 18:52:23,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 137 transitions, 1337 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:23,113 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 1132 flow [2024-06-21 18:52:23,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1132, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2024-06-21 18:52:23,113 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-21 18:52:23,114 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 1132 flow [2024-06-21 18:52:23,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:23,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:23,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:23,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:52:23,114 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:23,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1164958102, now seen corresponding path program 9 times [2024-06-21 18:52:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343757752] [2024-06-21 18:52:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:24,739 INFO 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 18:52:24,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:24,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343757752] [2024-06-21 18:52:24,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343757752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:24,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:24,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:24,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495554901] [2024-06-21 18:52:24,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:24,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:24,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:24,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 1132 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:24,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:24,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:24,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:25,202 INFO L124 PetriNetUnfolderBase]: 319/565 cut-off events. [2024-06-21 18:52:25,202 INFO L125 PetriNetUnfolderBase]: For 24533/24533 co-relation queries the response was YES. [2024-06-21 18:52:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 565 events. 319/565 cut-off events. For 24533/24533 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2228 event pairs, 52 based on Foata normal form. 1/564 useless extension candidates. Maximal degree in co-relation 3870. Up to 450 conditions per place. [2024-06-21 18:52:25,206 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 90 selfloop transitions, 50 changer transitions 0/142 dead transitions. [2024-06-21 18:52:25,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 142 transitions, 1580 flow [2024-06-21 18:52:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 18:52:25,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-21 18:52:25,207 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 1132 flow. Second operand 8 states and 103 transitions. [2024-06-21 18:52:25,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 142 transitions, 1580 flow [2024-06-21 18:52:25,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 142 transitions, 1546 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:25,249 INFO L231 Difference]: Finished difference. Result has 147 places, 130 transitions, 1271 flow [2024-06-21 18:52:25,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1271, PETRI_PLACES=147, PETRI_TRANSITIONS=130} [2024-06-21 18:52:25,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 18:52:25,249 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 130 transitions, 1271 flow [2024-06-21 18:52:25,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:25,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:25,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:25,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:52:25,250 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:25,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1164952522, now seen corresponding path program 10 times [2024-06-21 18:52:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:25,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032110869] [2024-06-21 18:52:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:26,836 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 18:52:26,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:26,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032110869] [2024-06-21 18:52:26,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032110869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:26,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:26,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:26,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565702612] [2024-06-21 18:52:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:26,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:26,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 130 transitions, 1271 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:26,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:26,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:26,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:27,311 INFO L124 PetriNetUnfolderBase]: 317/562 cut-off events. [2024-06-21 18:52:27,311 INFO L125 PetriNetUnfolderBase]: For 25253/25253 co-relation queries the response was YES. [2024-06-21 18:52:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 562 events. 317/562 cut-off events. For 25253/25253 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2211 event pairs, 52 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 3946. Up to 448 conditions per place. [2024-06-21 18:52:27,315 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 91 selfloop transitions, 48 changer transitions 0/141 dead transitions. [2024-06-21 18:52:27,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 141 transitions, 1577 flow [2024-06-21 18:52:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:52:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:52:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 18:52:27,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-21 18:52:27,321 INFO L175 Difference]: Start difference. First operand has 147 places, 130 transitions, 1271 flow. Second operand 8 states and 103 transitions. [2024-06-21 18:52:27,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 141 transitions, 1577 flow [2024-06-21 18:52:27,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 141 transitions, 1448 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:27,392 INFO L231 Difference]: Finished difference. Result has 150 places, 130 transitions, 1243 flow [2024-06-21 18:52:27,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1243, PETRI_PLACES=150, PETRI_TRANSITIONS=130} [2024-06-21 18:52:27,394 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 18:52:27,394 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 130 transitions, 1243 flow [2024-06-21 18:52:27,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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 18:52:27,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:27,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:52:27,400 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:27,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1164952367, now seen corresponding path program 8 times [2024-06-21 18:52:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:27,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055116262] [2024-06-21 18:52:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:27,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055116262] [2024-06-21 18:52:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055116262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:52:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79355303] [2024-06-21 18:52:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:52:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:52:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:52:28,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:28,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 130 transitions, 1243 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 18:52:28,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:28,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:28,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:29,419 INFO L124 PetriNetUnfolderBase]: 302/545 cut-off events. [2024-06-21 18:52:29,420 INFO L125 PetriNetUnfolderBase]: For 25442/25442 co-relation queries the response was YES. [2024-06-21 18:52:29,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3863 conditions, 545 events. 302/545 cut-off events. For 25442/25442 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2185 event pairs, 49 based on Foata normal form. 1/544 useless extension candidates. Maximal degree in co-relation 3787. Up to 432 conditions per place. [2024-06-21 18:52:29,423 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 88 selfloop transitions, 35 changer transitions 0/141 dead transitions. [2024-06-21 18:52:29,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 141 transitions, 1543 flow [2024-06-21 18:52:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:52:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:52:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 18:52:29,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317972350230416 [2024-06-21 18:52:29,425 INFO L175 Difference]: Start difference. First operand has 150 places, 130 transitions, 1243 flow. Second operand 7 states and 94 transitions. [2024-06-21 18:52:29,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 141 transitions, 1543 flow [2024-06-21 18:52:29,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 141 transitions, 1415 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:29,470 INFO L231 Difference]: Finished difference. Result has 149 places, 132 transitions, 1229 flow [2024-06-21 18:52:29,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=149, PETRI_TRANSITIONS=132} [2024-06-21 18:52:29,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-21 18:52:29,471 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 132 transitions, 1229 flow [2024-06-21 18:52:29,471 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 18:52:29,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:29,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:29,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:52:29,472 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:29,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1617900191, now seen corresponding path program 1 times [2024-06-21 18:52:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612121152] [2024-06-21 18:52:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:30,867 INFO 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 18:52:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:30,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612121152] [2024-06-21 18:52:30,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612121152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578596327] [2024-06-21 18:52:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:30,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:30,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 132 transitions, 1229 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 18:52:30,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:30,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:30,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:31,289 INFO L124 PetriNetUnfolderBase]: 318/578 cut-off events. [2024-06-21 18:52:31,289 INFO L125 PetriNetUnfolderBase]: For 29867/29867 co-relation queries the response was YES. [2024-06-21 18:52:31,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4106 conditions, 578 events. 318/578 cut-off events. For 29867/29867 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2448 event pairs, 60 based on Foata normal form. 2/575 useless extension candidates. Maximal degree in co-relation 4030. Up to 474 conditions per place. [2024-06-21 18:52:31,293 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 113 selfloop transitions, 20 changer transitions 0/151 dead transitions. [2024-06-21 18:52:31,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 1669 flow [2024-06-21 18:52:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 18:52:31,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 18:52:31,295 INFO L175 Difference]: Start difference. First operand has 149 places, 132 transitions, 1229 flow. Second operand 10 states and 122 transitions. [2024-06-21 18:52:31,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 1669 flow [2024-06-21 18:52:31,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1569 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:31,340 INFO L231 Difference]: Finished difference. Result has 155 places, 135 transitions, 1236 flow [2024-06-21 18:52:31,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1236, PETRI_PLACES=155, PETRI_TRANSITIONS=135} [2024-06-21 18:52:31,340 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 18:52:31,341 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 135 transitions, 1236 flow [2024-06-21 18:52:31,341 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 18:52:31,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:31,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:52:31,341 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:31,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1617960765, now seen corresponding path program 1 times [2024-06-21 18:52:31,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114626051] [2024-06-21 18:52:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:33,024 INFO 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 18:52:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114626051] [2024-06-21 18:52:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114626051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:33,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108460729] [2024-06-21 18:52:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:33,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:33,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:33,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 135 transitions, 1236 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:33,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:33,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:33,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:33,504 INFO L124 PetriNetUnfolderBase]: 339/606 cut-off events. [2024-06-21 18:52:33,504 INFO L125 PetriNetUnfolderBase]: For 29298/29298 co-relation queries the response was YES. [2024-06-21 18:52:33,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 606 events. 339/606 cut-off events. For 29298/29298 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2523 event pairs, 66 based on Foata normal form. 1/605 useless extension candidates. Maximal degree in co-relation 4173. Up to 556 conditions per place. [2024-06-21 18:52:33,508 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 22 changer transitions 0/152 dead transitions. [2024-06-21 18:52:33,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 152 transitions, 1694 flow [2024-06-21 18:52:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:52:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:52:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 18:52:33,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 18:52:33,509 INFO L175 Difference]: Start difference. First operand has 155 places, 135 transitions, 1236 flow. Second operand 11 states and 119 transitions. [2024-06-21 18:52:33,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 152 transitions, 1694 flow [2024-06-21 18:52:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 152 transitions, 1642 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:33,566 INFO L231 Difference]: Finished difference. Result has 160 places, 139 transitions, 1281 flow [2024-06-21 18:52:33,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1281, PETRI_PLACES=160, PETRI_TRANSITIONS=139} [2024-06-21 18:52:33,566 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 18:52:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 139 transitions, 1281 flow [2024-06-21 18:52:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:33,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:33,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:52:33,567 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -924919801, now seen corresponding path program 2 times [2024-06-21 18:52:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965457316] [2024-06-21 18:52:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:34,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:34,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965457316] [2024-06-21 18:52:34,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965457316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:34,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:34,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725212796] [2024-06-21 18:52:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:34,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:34,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:35,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:35,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 139 transitions, 1281 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 18:52:35,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:35,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:35,347 INFO L124 PetriNetUnfolderBase]: 332/603 cut-off events. [2024-06-21 18:52:35,347 INFO L125 PetriNetUnfolderBase]: For 32078/32078 co-relation queries the response was YES. [2024-06-21 18:52:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 603 events. 332/603 cut-off events. For 32078/32078 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2562 event pairs, 63 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 4187. Up to 515 conditions per place. [2024-06-21 18:52:35,351 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2024-06-21 18:52:35,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 153 transitions, 1598 flow [2024-06-21 18:52:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 18:52:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 18:52:35,352 INFO L175 Difference]: Start difference. First operand has 160 places, 139 transitions, 1281 flow. Second operand 10 states and 119 transitions. [2024-06-21 18:52:35,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 153 transitions, 1598 flow [2024-06-21 18:52:35,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 153 transitions, 1555 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:35,423 INFO L231 Difference]: Finished difference. Result has 163 places, 140 transitions, 1299 flow [2024-06-21 18:52:35,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1299, PETRI_PLACES=163, PETRI_TRANSITIONS=140} [2024-06-21 18:52:35,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 18:52:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 140 transitions, 1299 flow [2024-06-21 18:52:35,424 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 18:52:35,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:35,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:35,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:52:35,424 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:35,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 886610177, now seen corresponding path program 3 times [2024-06-21 18:52:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:35,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542748203] [2024-06-21 18:52:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:35,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:37,218 INFO 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 18:52:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542748203] [2024-06-21 18:52:37,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542748203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:37,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:37,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143548934] [2024-06-21 18:52:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:37,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:37,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 140 transitions, 1299 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:37,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:37,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:37,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:37,720 INFO L124 PetriNetUnfolderBase]: 329/598 cut-off events. [2024-06-21 18:52:37,720 INFO L125 PetriNetUnfolderBase]: For 31914/31914 co-relation queries the response was YES. [2024-06-21 18:52:37,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 598 events. 329/598 cut-off events. For 31914/31914 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2527 event pairs, 62 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 4123. Up to 518 conditions per place. [2024-06-21 18:52:37,725 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 116 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-06-21 18:52:37,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 151 transitions, 1589 flow [2024-06-21 18:52:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 18:52:37,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 18:52:37,726 INFO L175 Difference]: Start difference. First operand has 163 places, 140 transitions, 1299 flow. Second operand 10 states and 114 transitions. [2024-06-21 18:52:37,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 151 transitions, 1589 flow [2024-06-21 18:52:37,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 151 transitions, 1529 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:37,787 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1273 flow [2024-06-21 18:52:37,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1273, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-21 18:52:37,787 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-21 18:52:37,787 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1273 flow [2024-06-21 18:52:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:37,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:37,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:37,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:52:37,788 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:37,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:37,789 INFO L85 PathProgramCache]: Analyzing trace with hash -922123167, now seen corresponding path program 2 times [2024-06-21 18:52:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:37,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737975958] [2024-06-21 18:52:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:39,176 INFO 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 18:52:39,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:39,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737975958] [2024-06-21 18:52:39,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737975958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:39,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:39,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:39,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938849277] [2024-06-21 18:52:39,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:39,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:39,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:39,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:39,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:39,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1273 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:39,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:39,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:39,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:39,577 INFO L124 PetriNetUnfolderBase]: 343/614 cut-off events. [2024-06-21 18:52:39,577 INFO L125 PetriNetUnfolderBase]: For 31976/31976 co-relation queries the response was YES. [2024-06-21 18:52:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 614 events. 343/614 cut-off events. For 31976/31976 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2572 event pairs, 65 based on Foata normal form. 1/613 useless extension candidates. Maximal degree in co-relation 4198. Up to 574 conditions per place. [2024-06-21 18:52:39,582 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 132 selfloop transitions, 19 changer transitions 0/153 dead transitions. [2024-06-21 18:52:39,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 153 transitions, 1711 flow [2024-06-21 18:52:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 18:52:39,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:52:39,583 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1273 flow. Second operand 9 states and 102 transitions. [2024-06-21 18:52:39,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 153 transitions, 1711 flow [2024-06-21 18:52:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 153 transitions, 1681 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:39,643 INFO L231 Difference]: Finished difference. Result has 166 places, 142 transitions, 1308 flow [2024-06-21 18:52:39,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1308, PETRI_PLACES=166, PETRI_TRANSITIONS=142} [2024-06-21 18:52:39,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 18:52:39,644 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 142 transitions, 1308 flow [2024-06-21 18:52:39,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:39,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:39,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:39,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:52:39,644 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:39,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761925, now seen corresponding path program 3 times [2024-06-21 18:52:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346695205] [2024-06-21 18:52:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:41,187 INFO 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 18:52:41,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:41,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346695205] [2024-06-21 18:52:41,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346695205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:41,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:41,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:41,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549316283] [2024-06-21 18:52:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:41,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:41,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 142 transitions, 1308 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:41,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:41,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:41,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:41,659 INFO L124 PetriNetUnfolderBase]: 341/611 cut-off events. [2024-06-21 18:52:41,659 INFO L125 PetriNetUnfolderBase]: For 32450/32450 co-relation queries the response was YES. [2024-06-21 18:52:41,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 611 events. 341/611 cut-off events. For 32450/32450 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2551 event pairs, 65 based on Foata normal form. 1/610 useless extension candidates. Maximal degree in co-relation 4179. Up to 578 conditions per place. [2024-06-21 18:52:41,663 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-21 18:52:41,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 152 transitions, 1634 flow [2024-06-21 18:52:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 18:52:41,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 18:52:41,664 INFO L175 Difference]: Start difference. First operand has 166 places, 142 transitions, 1308 flow. Second operand 10 states and 105 transitions. [2024-06-21 18:52:41,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 152 transitions, 1634 flow [2024-06-21 18:52:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 152 transitions, 1569 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:41,747 INFO L231 Difference]: Finished difference. Result has 169 places, 142 transitions, 1280 flow [2024-06-21 18:52:41,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1280, PETRI_PLACES=169, PETRI_TRANSITIONS=142} [2024-06-21 18:52:41,748 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 18:52:41,748 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 142 transitions, 1280 flow [2024-06-21 18:52:41,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:41,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:41,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:41,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:52:41,748 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:41,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash 886615137, now seen corresponding path program 1 times [2024-06-21 18:52:41,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:41,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822481579] [2024-06-21 18:52:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:41,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:42,969 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 18:52:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822481579] [2024-06-21 18:52:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822481579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879306448] [2024-06-21 18:52:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:43,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:43,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 142 transitions, 1280 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:43,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:43,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:43,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:43,356 INFO L124 PetriNetUnfolderBase]: 350/626 cut-off events. [2024-06-21 18:52:43,356 INFO L125 PetriNetUnfolderBase]: For 35999/35999 co-relation queries the response was YES. [2024-06-21 18:52:43,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 626 events. 350/626 cut-off events. For 35999/35999 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2639 event pairs, 64 based on Foata normal form. 3/627 useless extension candidates. Maximal degree in co-relation 4261. Up to 587 conditions per place. [2024-06-21 18:52:43,361 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 138 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-21 18:52:43,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 156 transitions, 1644 flow [2024-06-21 18:52:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 18:52:43,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 18:52:43,362 INFO L175 Difference]: Start difference. First operand has 169 places, 142 transitions, 1280 flow. Second operand 9 states and 101 transitions. [2024-06-21 18:52:43,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 156 transitions, 1644 flow [2024-06-21 18:52:43,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 156 transitions, 1607 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 18:52:43,435 INFO L231 Difference]: Finished difference. Result has 169 places, 144 transitions, 1306 flow [2024-06-21 18:52:43,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1306, PETRI_PLACES=169, PETRI_TRANSITIONS=144} [2024-06-21 18:52:43,436 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 18:52:43,436 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 144 transitions, 1306 flow [2024-06-21 18:52:43,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:43,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:43,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:43,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:52:43,437 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:43,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1736053281, now seen corresponding path program 2 times [2024-06-21 18:52:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:43,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221923176] [2024-06-21 18:52:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:44,662 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 18:52:44,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:44,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221923176] [2024-06-21 18:52:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221923176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:44,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:44,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400097402] [2024-06-21 18:52:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:44,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:44,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:44,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 144 transitions, 1306 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:44,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:44,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:44,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:44,975 INFO L124 PetriNetUnfolderBase]: 363/647 cut-off events. [2024-06-21 18:52:44,975 INFO L125 PetriNetUnfolderBase]: For 37584/37584 co-relation queries the response was YES. [2024-06-21 18:52:44,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4631 conditions, 647 events. 363/647 cut-off events. For 37584/37584 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2756 event pairs, 67 based on Foata normal form. 1/646 useless extension candidates. Maximal degree in co-relation 4544. Up to 534 conditions per place. [2024-06-21 18:52:44,980 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 36 changer transitions 0/164 dead transitions. [2024-06-21 18:52:44,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 164 transitions, 1942 flow [2024-06-21 18:52:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 18:52:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 18:52:44,984 INFO L175 Difference]: Start difference. First operand has 169 places, 144 transitions, 1306 flow. Second operand 9 states and 112 transitions. [2024-06-21 18:52:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 164 transitions, 1942 flow [2024-06-21 18:52:45,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 164 transitions, 1880 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:45,057 INFO L231 Difference]: Finished difference. Result has 172 places, 153 transitions, 1439 flow [2024-06-21 18:52:45,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1439, PETRI_PLACES=172, PETRI_TRANSITIONS=153} [2024-06-21 18:52:45,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 18:52:45,058 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 153 transitions, 1439 flow [2024-06-21 18:52:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:45,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:45,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:52:45,058 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:45,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1736053095, now seen corresponding path program 4 times [2024-06-21 18:52:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559700933] [2024-06-21 18:52:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559700933] [2024-06-21 18:52:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559700933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:46,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034938648] [2024-06-21 18:52:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:46,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:46,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 153 transitions, 1439 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:46,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:46,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:46,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:46,855 INFO L124 PetriNetUnfolderBase]: 366/652 cut-off events. [2024-06-21 18:52:46,855 INFO L125 PetriNetUnfolderBase]: For 39272/39272 co-relation queries the response was YES. [2024-06-21 18:52:46,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 652 events. 366/652 cut-off events. For 39272/39272 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2783 event pairs, 66 based on Foata normal form. 1/651 useless extension candidates. Maximal degree in co-relation 4659. Up to 577 conditions per place. [2024-06-21 18:52:46,860 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 34 changer transitions 0/164 dead transitions. [2024-06-21 18:52:46,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 164 transitions, 1811 flow [2024-06-21 18:52:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 18:52:46,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 18:52:46,861 INFO L175 Difference]: Start difference. First operand has 172 places, 153 transitions, 1439 flow. Second operand 10 states and 112 transitions. [2024-06-21 18:52:46,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 164 transitions, 1811 flow [2024-06-21 18:52:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 164 transitions, 1767 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 18:52:46,939 INFO L231 Difference]: Finished difference. Result has 179 places, 155 transitions, 1498 flow [2024-06-21 18:52:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1498, PETRI_PLACES=179, PETRI_TRANSITIONS=155} [2024-06-21 18:52:46,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 18:52:46,940 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 155 transitions, 1498 flow [2024-06-21 18:52:46,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:46,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:46,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:46,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:52:46,941 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:46,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1736048445, now seen corresponding path program 5 times [2024-06-21 18:52:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:46,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753040595] [2024-06-21 18:52:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:46,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:48,460 INFO 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 18:52:48,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:48,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753040595] [2024-06-21 18:52:48,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753040595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:48,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:48,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587773523] [2024-06-21 18:52:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:48,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:48,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 155 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:48,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:48,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:48,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:48,768 INFO L124 PetriNetUnfolderBase]: 374/665 cut-off events. [2024-06-21 18:52:48,768 INFO L125 PetriNetUnfolderBase]: For 42122/42122 co-relation queries the response was YES. [2024-06-21 18:52:48,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 665 events. 374/665 cut-off events. For 42122/42122 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2851 event pairs, 66 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 4890. Up to 580 conditions per place. [2024-06-21 18:52:48,773 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2024-06-21 18:52:48,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 169 transitions, 2012 flow [2024-06-21 18:52:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 18:52:48,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:52:48,773 INFO L175 Difference]: Start difference. First operand has 179 places, 155 transitions, 1498 flow. Second operand 9 states and 108 transitions. [2024-06-21 18:52:48,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 169 transitions, 2012 flow [2024-06-21 18:52:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 169 transitions, 1925 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:48,854 INFO L231 Difference]: Finished difference. Result has 180 places, 159 transitions, 1558 flow [2024-06-21 18:52:48,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1558, PETRI_PLACES=180, PETRI_TRANSITIONS=159} [2024-06-21 18:52:48,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-21 18:52:48,854 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 159 transitions, 1558 flow [2024-06-21 18:52:48,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:48,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:48,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:48,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:52:48,855 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:48,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:48,855 INFO L85 PathProgramCache]: Analyzing trace with hash 68144081, now seen corresponding path program 4 times [2024-06-21 18:52:48,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:48,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195389675] [2024-06-21 18:52:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:48,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:50,398 INFO 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 18:52:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195389675] [2024-06-21 18:52:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195389675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:50,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258142324] [2024-06-21 18:52:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:50,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:52:50,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 159 transitions, 1558 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:50,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:50,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:52:50,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:50,782 INFO L124 PetriNetUnfolderBase]: 364/659 cut-off events. [2024-06-21 18:52:50,782 INFO L125 PetriNetUnfolderBase]: For 45730/45730 co-relation queries the response was YES. [2024-06-21 18:52:50,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5019 conditions, 659 events. 364/659 cut-off events. For 45730/45730 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2902 event pairs, 61 based on Foata normal form. 2/659 useless extension candidates. Maximal degree in co-relation 4927. Up to 556 conditions per place. [2024-06-21 18:52:50,788 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 124 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-06-21 18:52:50,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 170 transitions, 1898 flow [2024-06-21 18:52:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 18:52:50,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 18:52:50,789 INFO L175 Difference]: Start difference. First operand has 180 places, 159 transitions, 1558 flow. Second operand 10 states and 117 transitions. [2024-06-21 18:52:50,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 170 transitions, 1898 flow [2024-06-21 18:52:50,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 170 transitions, 1822 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:50,876 INFO L231 Difference]: Finished difference. Result has 185 places, 160 transitions, 1556 flow [2024-06-21 18:52:50,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1556, PETRI_PLACES=185, PETRI_TRANSITIONS=160} [2024-06-21 18:52:50,876 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 18:52:50,876 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 160 transitions, 1556 flow [2024-06-21 18:52:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:50,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:50,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:50,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:52:50,877 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:50,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:50,877 INFO L85 PathProgramCache]: Analyzing trace with hash 68328531, now seen corresponding path program 3 times [2024-06-21 18:52:50,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:50,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767890662] [2024-06-21 18:52:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:52,067 INFO 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 18:52:52,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:52,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767890662] [2024-06-21 18:52:52,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767890662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:52,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:52,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:52,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047952255] [2024-06-21 18:52:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:52,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:52,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 160 transitions, 1556 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:52,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:52,374 INFO L124 PetriNetUnfolderBase]: 381/678 cut-off events. [2024-06-21 18:52:52,374 INFO L125 PetriNetUnfolderBase]: For 45822/45822 co-relation queries the response was YES. [2024-06-21 18:52:52,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5159 conditions, 678 events. 381/678 cut-off events. For 45822/45822 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2932 event pairs, 67 based on Foata normal form. 1/677 useless extension candidates. Maximal degree in co-relation 5065. Up to 564 conditions per place. [2024-06-21 18:52:52,380 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 130 selfloop transitions, 41 changer transitions 0/173 dead transitions. [2024-06-21 18:52:52,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 173 transitions, 2146 flow [2024-06-21 18:52:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 18:52:52,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 18:52:52,380 INFO L175 Difference]: Start difference. First operand has 185 places, 160 transitions, 1556 flow. Second operand 9 states and 110 transitions. [2024-06-21 18:52:52,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 173 transitions, 2146 flow [2024-06-21 18:52:52,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 173 transitions, 2082 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:52,469 INFO L231 Difference]: Finished difference. Result has 186 places, 162 transitions, 1601 flow [2024-06-21 18:52:52,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1601, PETRI_PLACES=186, PETRI_TRANSITIONS=162} [2024-06-21 18:52:52,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 18:52:52,469 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 162 transitions, 1601 flow [2024-06-21 18:52:52,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:52,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:52,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:52,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:52:52,470 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:52,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash -806654181, now seen corresponding path program 4 times [2024-06-21 18:52:52,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278446508] [2024-06-21 18:52:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:52,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:53,669 INFO 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 18:52:53,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:53,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278446508] [2024-06-21 18:52:53,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278446508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:53,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:53,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326998495] [2024-06-21 18:52:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:53,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:53,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 162 transitions, 1601 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:53,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:53,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:54,019 INFO L124 PetriNetUnfolderBase]: 379/675 cut-off events. [2024-06-21 18:52:54,020 INFO L125 PetriNetUnfolderBase]: For 46024/46024 co-relation queries the response was YES. [2024-06-21 18:52:54,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5132 conditions, 675 events. 379/675 cut-off events. For 46024/46024 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2909 event pairs, 69 based on Foata normal form. 1/674 useless extension candidates. Maximal degree in co-relation 5037. Up to 562 conditions per place. [2024-06-21 18:52:54,025 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 39 changer transitions 0/172 dead transitions. [2024-06-21 18:52:54,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 172 transitions, 2067 flow [2024-06-21 18:52:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 18:52:54,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 18:52:54,027 INFO L175 Difference]: Start difference. First operand has 186 places, 162 transitions, 1601 flow. Second operand 9 states and 110 transitions. [2024-06-21 18:52:54,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 172 transitions, 2067 flow [2024-06-21 18:52:54,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 172 transitions, 1972 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:54,132 INFO L231 Difference]: Finished difference. Result has 189 places, 162 transitions, 1589 flow [2024-06-21 18:52:54,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=189, PETRI_TRANSITIONS=162} [2024-06-21 18:52:54,133 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-21 18:52:54,133 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 162 transitions, 1589 flow [2024-06-21 18:52:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:54,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:52:54,134 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:54,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 891256581, now seen corresponding path program 6 times [2024-06-21 18:52:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335413362] [2024-06-21 18:52:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:55,654 INFO 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 18:52:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335413362] [2024-06-21 18:52:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335413362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:55,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:55,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59083775] [2024-06-21 18:52:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:55,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 162 transitions, 1589 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:55,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:55,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:55,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:56,045 INFO L124 PetriNetUnfolderBase]: 377/672 cut-off events. [2024-06-21 18:52:56,045 INFO L125 PetriNetUnfolderBase]: For 46426/46426 co-relation queries the response was YES. [2024-06-21 18:52:56,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5080 conditions, 672 events. 377/672 cut-off events. For 46426/46426 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2904 event pairs, 66 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 4984. Up to 597 conditions per place. [2024-06-21 18:52:56,051 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 35 changer transitions 0/171 dead transitions. [2024-06-21 18:52:56,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 171 transitions, 1949 flow [2024-06-21 18:52:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 18:52:56,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 18:52:56,052 INFO L175 Difference]: Start difference. First operand has 189 places, 162 transitions, 1589 flow. Second operand 10 states and 111 transitions. [2024-06-21 18:52:56,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 171 transitions, 1949 flow [2024-06-21 18:52:56,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 171 transitions, 1866 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:56,153 INFO L231 Difference]: Finished difference. Result has 192 places, 162 transitions, 1581 flow [2024-06-21 18:52:56,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1581, PETRI_PLACES=192, PETRI_TRANSITIONS=162} [2024-06-21 18:52:56,153 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-21 18:52:56,154 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 162 transitions, 1581 flow [2024-06-21 18:52:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:56,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:56,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:52:56,154 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1548858833, now seen corresponding path program 5 times [2024-06-21 18:52:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371134511] [2024-06-21 18:52:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:57,258 INFO 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 18:52:57,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:57,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371134511] [2024-06-21 18:52:57,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371134511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:57,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:57,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506448148] [2024-06-21 18:52:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:57,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:57,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 162 transitions, 1581 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:57,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:57,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:57,541 INFO L124 PetriNetUnfolderBase]: 385/684 cut-off events. [2024-06-21 18:52:57,541 INFO L125 PetriNetUnfolderBase]: For 49568/49568 co-relation queries the response was YES. [2024-06-21 18:52:57,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 684 events. 385/684 cut-off events. For 49568/49568 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2971 event pairs, 64 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 5131. Up to 615 conditions per place. [2024-06-21 18:52:57,547 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 147 selfloop transitions, 28 changer transitions 0/177 dead transitions. [2024-06-21 18:52:57,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 177 transitions, 2224 flow [2024-06-21 18:52:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 18:52:57,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 18:52:57,548 INFO L175 Difference]: Start difference. First operand has 192 places, 162 transitions, 1581 flow. Second operand 9 states and 106 transitions. [2024-06-21 18:52:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 177 transitions, 2224 flow [2024-06-21 18:52:57,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 177 transitions, 2142 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:52:57,646 INFO L231 Difference]: Finished difference. Result has 192 places, 167 transitions, 1619 flow [2024-06-21 18:52:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1619, PETRI_PLACES=192, PETRI_TRANSITIONS=167} [2024-06-21 18:52:57,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-21 18:52:57,646 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 167 transitions, 1619 flow [2024-06-21 18:52:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:52:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:52:57,647 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -641015233, now seen corresponding path program 7 times [2024-06-21 18:52:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789912521] [2024-06-21 18:52:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:59,126 INFO 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 18:52:59,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789912521] [2024-06-21 18:52:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789912521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:59,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637948394] [2024-06-21 18:52:59,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:59,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:52:59,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 167 transitions, 1619 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:59,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:59,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:52:59,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:59,573 INFO L124 PetriNetUnfolderBase]: 388/689 cut-off events. [2024-06-21 18:52:59,573 INFO L125 PetriNetUnfolderBase]: For 51451/51451 co-relation queries the response was YES. [2024-06-21 18:52:59,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5287 conditions, 689 events. 388/689 cut-off events. For 51451/51451 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2990 event pairs, 64 based on Foata normal form. 1/688 useless extension candidates. Maximal degree in co-relation 5189. Up to 646 conditions per place. [2024-06-21 18:52:59,580 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 152 selfloop transitions, 23 changer transitions 0/177 dead transitions. [2024-06-21 18:52:59,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 177 transitions, 2021 flow [2024-06-21 18:52:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 18:52:59,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 18:52:59,582 INFO L175 Difference]: Start difference. First operand has 192 places, 167 transitions, 1619 flow. Second operand 10 states and 107 transitions. [2024-06-21 18:52:59,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 177 transitions, 2021 flow [2024-06-21 18:52:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 177 transitions, 1940 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:59,693 INFO L231 Difference]: Finished difference. Result has 196 places, 169 transitions, 1627 flow [2024-06-21 18:52:59,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1627, PETRI_PLACES=196, PETRI_TRANSITIONS=169} [2024-06-21 18:52:59,693 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 18:52:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 169 transitions, 1627 flow [2024-06-21 18:52:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:59,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:59,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:52:59,694 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:52:59,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 518651591, now seen corresponding path program 1 times [2024-06-21 18:52:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:59,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735908679] [2024-06-21 18:52:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:00,976 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 18:53:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735908679] [2024-06-21 18:53:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735908679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072602721] [2024-06-21 18:53:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:00,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:01,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 169 transitions, 1627 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:01,478 INFO L124 PetriNetUnfolderBase]: 394/699 cut-off events. [2024-06-21 18:53:01,479 INFO L125 PetriNetUnfolderBase]: For 54802/54802 co-relation queries the response was YES. [2024-06-21 18:53:01,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 699 events. 394/699 cut-off events. For 54802/54802 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3043 event pairs, 62 based on Foata normal form. 2/699 useless extension candidates. Maximal degree in co-relation 5266. Up to 665 conditions per place. [2024-06-21 18:53:01,503 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-21 18:53:01,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 181 transitions, 2031 flow [2024-06-21 18:53:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 18:53:01,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 18:53:01,504 INFO L175 Difference]: Start difference. First operand has 196 places, 169 transitions, 1627 flow. Second operand 10 states and 105 transitions. [2024-06-21 18:53:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 181 transitions, 2031 flow [2024-06-21 18:53:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 181 transitions, 1958 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:01,609 INFO L231 Difference]: Finished difference. Result has 198 places, 172 transitions, 1626 flow [2024-06-21 18:53:01,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1626, PETRI_PLACES=198, PETRI_TRANSITIONS=172} [2024-06-21 18:53:01,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 18:53:01,610 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 172 transitions, 1626 flow [2024-06-21 18:53:01,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:01,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:01,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:01,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:53:01,611 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:01,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 160747201, now seen corresponding path program 5 times [2024-06-21 18:53:01,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:01,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317167565] [2024-06-21 18:53:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:01,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:02,992 INFO 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 18:53:02,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317167565] [2024-06-21 18:53:02,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317167565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:02,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:02,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172606327] [2024-06-21 18:53:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:03,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:03,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 172 transitions, 1626 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 18:53:03,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:03,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:03,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:03,397 INFO L124 PetriNetUnfolderBase]: 382/691 cut-off events. [2024-06-21 18:53:03,397 INFO L125 PetriNetUnfolderBase]: For 57211/57211 co-relation queries the response was YES. [2024-06-21 18:53:03,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5404 conditions, 691 events. 382/691 cut-off events. For 57211/57211 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3077 event pairs, 62 based on Foata normal form. 2/691 useless extension candidates. Maximal degree in co-relation 5304. Up to 607 conditions per place. [2024-06-21 18:53:03,403 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 142 selfloop transitions, 15 changer transitions 0/182 dead transitions. [2024-06-21 18:53:03,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 182 transitions, 1986 flow [2024-06-21 18:53:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 18:53:03,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 18:53:03,405 INFO L175 Difference]: Start difference. First operand has 198 places, 172 transitions, 1626 flow. Second operand 9 states and 105 transitions. [2024-06-21 18:53:03,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 182 transitions, 1986 flow [2024-06-21 18:53:03,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 182 transitions, 1927 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:03,523 INFO L231 Difference]: Finished difference. Result has 199 places, 173 transitions, 1629 flow [2024-06-21 18:53:03,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1629, PETRI_PLACES=199, PETRI_TRANSITIONS=173} [2024-06-21 18:53:03,524 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 18:53:03,524 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 173 transitions, 1629 flow [2024-06-21 18:53:03,524 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 18:53:03,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:03,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:53:03,525 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:03,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash 388826291, now seen corresponding path program 6 times [2024-06-21 18:53:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013447953] [2024-06-21 18:53:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:04,604 INFO 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 18:53:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:04,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013447953] [2024-06-21 18:53:04,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013447953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:04,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:04,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205192294] [2024-06-21 18:53:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:04,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:04,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 173 transitions, 1629 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:04,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:04,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:04,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:04,944 INFO L124 PetriNetUnfolderBase]: 401/712 cut-off events. [2024-06-21 18:53:04,945 INFO L125 PetriNetUnfolderBase]: For 57030/57030 co-relation queries the response was YES. [2024-06-21 18:53:04,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 712 events. 401/712 cut-off events. For 57030/57030 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3118 event pairs, 66 based on Foata normal form. 1/711 useless extension candidates. Maximal degree in co-relation 5414. Up to 669 conditions per place. [2024-06-21 18:53:04,951 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 161 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-21 18:53:04,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 184 transitions, 2151 flow [2024-06-21 18:53:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 18:53:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 18:53:04,952 INFO L175 Difference]: Start difference. First operand has 199 places, 173 transitions, 1629 flow. Second operand 9 states and 101 transitions. [2024-06-21 18:53:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 184 transitions, 2151 flow [2024-06-21 18:53:05,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 184 transitions, 2089 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:05,079 INFO L231 Difference]: Finished difference. Result has 200 places, 175 transitions, 1638 flow [2024-06-21 18:53:05,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1638, PETRI_PLACES=200, PETRI_TRANSITIONS=175} [2024-06-21 18:53:05,079 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-21 18:53:05,079 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 175 transitions, 1638 flow [2024-06-21 18:53:05,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:05,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:05,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:05,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:53:05,080 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:05,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 518642973, now seen corresponding path program 7 times [2024-06-21 18:53:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:05,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159368702] [2024-06-21 18:53:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:05,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:06,095 INFO 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 18:53:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159368702] [2024-06-21 18:53:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159368702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:06,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:06,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482991060] [2024-06-21 18:53:06,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:06,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:06,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:06,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 175 transitions, 1638 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:06,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:06,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:06,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:06,471 INFO L124 PetriNetUnfolderBase]: 404/717 cut-off events. [2024-06-21 18:53:06,472 INFO L125 PetriNetUnfolderBase]: For 58732/58732 co-relation queries the response was YES. [2024-06-21 18:53:06,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5529 conditions, 717 events. 404/717 cut-off events. For 58732/58732 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3158 event pairs, 66 based on Foata normal form. 1/716 useless extension candidates. Maximal degree in co-relation 5430. Up to 689 conditions per place. [2024-06-21 18:53:06,477 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 168 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2024-06-21 18:53:06,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 186 transitions, 2061 flow [2024-06-21 18:53:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 18:53:06,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 18:53:06,479 INFO L175 Difference]: Start difference. First operand has 200 places, 175 transitions, 1638 flow. Second operand 9 states and 97 transitions. [2024-06-21 18:53:06,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 186 transitions, 2061 flow [2024-06-21 18:53:06,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 186 transitions, 1993 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:06,620 INFO L231 Difference]: Finished difference. Result has 204 places, 178 transitions, 1653 flow [2024-06-21 18:53:06,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1653, PETRI_PLACES=204, PETRI_TRANSITIONS=178} [2024-06-21 18:53:06,621 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-21 18:53:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 178 transitions, 1653 flow [2024-06-21 18:53:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:53:06,622 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash 160747325, now seen corresponding path program 8 times [2024-06-21 18:53:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093739362] [2024-06-21 18:53:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:08,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:08,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093739362] [2024-06-21 18:53:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093739362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:08,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160163167] [2024-06-21 18:53:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:08,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:08,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 178 transitions, 1653 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:08,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:08,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:08,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:08,637 INFO L124 PetriNetUnfolderBase]: 412/730 cut-off events. [2024-06-21 18:53:08,637 INFO L125 PetriNetUnfolderBase]: For 62476/62476 co-relation queries the response was YES. [2024-06-21 18:53:08,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5712 conditions, 730 events. 412/730 cut-off events. For 62476/62476 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3219 event pairs, 67 based on Foata normal form. 1/729 useless extension candidates. Maximal degree in co-relation 5611. Up to 675 conditions per place. [2024-06-21 18:53:08,644 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 160 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-21 18:53:08,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 191 transitions, 2245 flow [2024-06-21 18:53:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 18:53:08,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 18:53:08,651 INFO L175 Difference]: Start difference. First operand has 204 places, 178 transitions, 1653 flow. Second operand 10 states and 108 transitions. [2024-06-21 18:53:08,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 191 transitions, 2245 flow [2024-06-21 18:53:08,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 191 transitions, 2207 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:08,785 INFO L231 Difference]: Finished difference. Result has 208 places, 182 transitions, 1758 flow [2024-06-21 18:53:08,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1758, PETRI_PLACES=208, PETRI_TRANSITIONS=182} [2024-06-21 18:53:08,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 18:53:08,785 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 182 transitions, 1758 flow [2024-06-21 18:53:08,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:08,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:08,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:08,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:53:08,786 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:08,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash 510368763, now seen corresponding path program 8 times [2024-06-21 18:53:08,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:08,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351251213] [2024-06-21 18:53:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:08,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:09,850 INFO 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 18:53:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351251213] [2024-06-21 18:53:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351251213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:09,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:09,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:09,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412427921] [2024-06-21 18:53:09,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:09,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:09,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:09,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 182 transitions, 1758 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:09,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:09,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:09,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:10,221 INFO L124 PetriNetUnfolderBase]: 410/727 cut-off events. [2024-06-21 18:53:10,221 INFO L125 PetriNetUnfolderBase]: For 62967/62967 co-relation queries the response was YES. [2024-06-21 18:53:10,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 727 events. 410/727 cut-off events. For 62967/62967 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3208 event pairs, 67 based on Foata normal form. 1/726 useless extension candidates. Maximal degree in co-relation 5620. Up to 684 conditions per place. [2024-06-21 18:53:10,228 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 165 selfloop transitions, 23 changer transitions 0/190 dead transitions. [2024-06-21 18:53:10,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 190 transitions, 2152 flow [2024-06-21 18:53:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 18:53:10,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 18:53:10,229 INFO L175 Difference]: Start difference. First operand has 208 places, 182 transitions, 1758 flow. Second operand 9 states and 101 transitions. [2024-06-21 18:53:10,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 190 transitions, 2152 flow [2024-06-21 18:53:10,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 190 transitions, 2065 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:10,366 INFO L231 Difference]: Finished difference. Result has 211 places, 182 transitions, 1722 flow [2024-06-21 18:53:10,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1722, PETRI_PLACES=211, PETRI_TRANSITIONS=182} [2024-06-21 18:53:10,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 18:53:10,367 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 182 transitions, 1722 flow [2024-06-21 18:53:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:10,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:10,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:10,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:53:10,367 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:10,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:10,367 INFO L85 PathProgramCache]: Analyzing trace with hash 160751975, now seen corresponding path program 9 times [2024-06-21 18:53:10,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144689370] [2024-06-21 18:53:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:11,745 INFO 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 18:53:11,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:11,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144689370] [2024-06-21 18:53:11,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144689370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:11,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:11,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173923609] [2024-06-21 18:53:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:11,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:11,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 182 transitions, 1722 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:11,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:11,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:11,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:12,161 INFO L124 PetriNetUnfolderBase]: 413/732 cut-off events. [2024-06-21 18:53:12,161 INFO L125 PetriNetUnfolderBase]: For 64814/64814 co-relation queries the response was YES. [2024-06-21 18:53:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5759 conditions, 732 events. 413/732 cut-off events. For 64814/64814 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3235 event pairs, 67 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 5655. Up to 689 conditions per place. [2024-06-21 18:53:12,167 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 166 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-21 18:53:12,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 192 transitions, 2148 flow [2024-06-21 18:53:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 18:53:12,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 18:53:12,168 INFO L175 Difference]: Start difference. First operand has 211 places, 182 transitions, 1722 flow. Second operand 10 states and 106 transitions. [2024-06-21 18:53:12,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 192 transitions, 2148 flow [2024-06-21 18:53:12,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 192 transitions, 2091 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:12,318 INFO L231 Difference]: Finished difference. Result has 213 places, 184 transitions, 1750 flow [2024-06-21 18:53:12,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1750, PETRI_PLACES=213, PETRI_TRANSITIONS=184} [2024-06-21 18:53:12,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 18:53:12,319 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 184 transitions, 1750 flow [2024-06-21 18:53:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:12,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:12,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:12,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:53:12,319 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:12,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 388826105, now seen corresponding path program 10 times [2024-06-21 18:53:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389299316] [2024-06-21 18:53:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:13,645 INFO 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 18:53:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389299316] [2024-06-21 18:53:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389299316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:13,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:13,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529872892] [2024-06-21 18:53:13,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:13,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:13,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 184 transitions, 1750 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:13,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:13,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:13,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:14,071 INFO L124 PetriNetUnfolderBase]: 411/729 cut-off events. [2024-06-21 18:53:14,072 INFO L125 PetriNetUnfolderBase]: For 65001/65001 co-relation queries the response was YES. [2024-06-21 18:53:14,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 729 events. 411/729 cut-off events. For 65001/65001 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3217 event pairs, 67 based on Foata normal form. 1/728 useless extension candidates. Maximal degree in co-relation 5606. Up to 701 conditions per place. [2024-06-21 18:53:14,077 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2024-06-21 18:53:14,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 192 transitions, 2148 flow [2024-06-21 18:53:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 18:53:14,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 18:53:14,078 INFO L175 Difference]: Start difference. First operand has 213 places, 184 transitions, 1750 flow. Second operand 10 states and 103 transitions. [2024-06-21 18:53:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 192 transitions, 2148 flow [2024-06-21 18:53:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 192 transitions, 2069 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:14,222 INFO L231 Difference]: Finished difference. Result has 215 places, 184 transitions, 1708 flow [2024-06-21 18:53:14,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1708, PETRI_PLACES=215, PETRI_TRANSITIONS=184} [2024-06-21 18:53:14,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 18:53:14,223 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 184 transitions, 1708 flow [2024-06-21 18:53:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:14,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:14,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:53:14,223 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:14,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 160752161, now seen corresponding path program 9 times [2024-06-21 18:53:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471089297] [2024-06-21 18:53:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:15,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:15,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471089297] [2024-06-21 18:53:15,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471089297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:15,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:15,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:15,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323087637] [2024-06-21 18:53:15,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:15,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:15,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:15,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:15,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 184 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:15,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:15,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:15,648 INFO L124 PetriNetUnfolderBase]: 414/734 cut-off events. [2024-06-21 18:53:15,648 INFO L125 PetriNetUnfolderBase]: For 66875/66875 co-relation queries the response was YES. [2024-06-21 18:53:15,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5725 conditions, 734 events. 414/734 cut-off events. For 66875/66875 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3247 event pairs, 67 based on Foata normal form. 1/733 useless extension candidates. Maximal degree in co-relation 5620. Up to 663 conditions per place. [2024-06-21 18:53:15,654 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 156 selfloop transitions, 37 changer transitions 0/195 dead transitions. [2024-06-21 18:53:15,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 195 transitions, 2260 flow [2024-06-21 18:53:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 18:53:15,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 18:53:15,655 INFO L175 Difference]: Start difference. First operand has 215 places, 184 transitions, 1708 flow. Second operand 9 states and 104 transitions. [2024-06-21 18:53:15,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 195 transitions, 2260 flow [2024-06-21 18:53:15,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 195 transitions, 2209 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:15,823 INFO L231 Difference]: Finished difference. Result has 215 places, 186 transitions, 1756 flow [2024-06-21 18:53:15,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=215, PETRI_TRANSITIONS=186} [2024-06-21 18:53:15,824 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 18:53:15,824 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 186 transitions, 1756 flow [2024-06-21 18:53:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:15,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:15,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:15,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:53:15,825 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:15,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 160925141, now seen corresponding path program 10 times [2024-06-21 18:53:15,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:15,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269845483] [2024-06-21 18:53:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:15,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:17,004 INFO 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 18:53:17,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:17,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269845483] [2024-06-21 18:53:17,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269845483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:17,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:17,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:17,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495699960] [2024-06-21 18:53:17,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:17,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 186 transitions, 1756 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:17,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:17,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:17,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:17,371 INFO L124 PetriNetUnfolderBase]: 412/731 cut-off events. [2024-06-21 18:53:17,371 INFO L125 PetriNetUnfolderBase]: For 66970/66970 co-relation queries the response was YES. [2024-06-21 18:53:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 731 events. 412/731 cut-off events. For 66970/66970 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3232 event pairs, 67 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 5604. Up to 661 conditions per place. [2024-06-21 18:53:17,376 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 158 selfloop transitions, 34 changer transitions 0/194 dead transitions. [2024-06-21 18:53:17,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 194 transitions, 2158 flow [2024-06-21 18:53:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 18:53:17,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 18:53:17,377 INFO L175 Difference]: Start difference. First operand has 215 places, 186 transitions, 1756 flow. Second operand 9 states and 105 transitions. [2024-06-21 18:53:17,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 194 transitions, 2158 flow [2024-06-21 18:53:17,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 194 transitions, 2095 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:17,539 INFO L231 Difference]: Finished difference. Result has 219 places, 186 transitions, 1766 flow [2024-06-21 18:53:17,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1766, PETRI_PLACES=219, PETRI_TRANSITIONS=186} [2024-06-21 18:53:17,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-21 18:53:17,540 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 186 transitions, 1766 flow [2024-06-21 18:53:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:17,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:17,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:17,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:53:17,540 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:17,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:17,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1244197759, now seen corresponding path program 6 times [2024-06-21 18:53:17,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:17,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497823114] [2024-06-21 18:53:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:17,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:18,653 INFO 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 18:53:18,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:18,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497823114] [2024-06-21 18:53:18,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497823114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:18,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:18,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:53:18,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876670721] [2024-06-21 18:53:18,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:18,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:53:18,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:53:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:53:18,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 18:53:18,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 186 transitions, 1766 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 18:53:18,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:18,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 18:53:18,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:19,075 INFO L124 PetriNetUnfolderBase]: 378/713 cut-off events. [2024-06-21 18:53:19,075 INFO L125 PetriNetUnfolderBase]: For 80091/80095 co-relation queries the response was YES. [2024-06-21 18:53:19,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5763 conditions, 713 events. 378/713 cut-off events. For 80091/80095 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3427 event pairs, 21 based on Foata normal form. 3/712 useless extension candidates. Maximal degree in co-relation 5656. Up to 437 conditions per place. [2024-06-21 18:53:19,081 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 110 selfloop transitions, 37 changer transitions 0/205 dead transitions. [2024-06-21 18:53:19,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 205 transitions, 2290 flow [2024-06-21 18:53:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-21 18:53:19,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45878136200716846 [2024-06-21 18:53:19,082 INFO L175 Difference]: Start difference. First operand has 219 places, 186 transitions, 1766 flow. Second operand 9 states and 128 transitions. [2024-06-21 18:53:19,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 205 transitions, 2290 flow [2024-06-21 18:53:19,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 205 transitions, 2213 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:19,215 INFO L231 Difference]: Finished difference. Result has 221 places, 189 transitions, 1836 flow [2024-06-21 18:53:19,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1836, PETRI_PLACES=221, PETRI_TRANSITIONS=189} [2024-06-21 18:53:19,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-21 18:53:19,215 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 189 transitions, 1836 flow [2024-06-21 18:53:19,216 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 18:53:19,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:19,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:19,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:53:19,216 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:19,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1638499485, now seen corresponding path program 11 times [2024-06-21 18:53:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:19,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204155962] [2024-06-21 18:53:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204155962] [2024-06-21 18:53:21,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204155962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:21,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:21,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:21,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717089730] [2024-06-21 18:53:21,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:21,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:21,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:21,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:21,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:21,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 189 transitions, 1836 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:21,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:21,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:21,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:21,572 INFO L124 PetriNetUnfolderBase]: 431/768 cut-off events. [2024-06-21 18:53:21,572 INFO L125 PetriNetUnfolderBase]: For 76310/76310 co-relation queries the response was YES. [2024-06-21 18:53:21,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6174 conditions, 768 events. 431/768 cut-off events. For 76310/76310 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3497 event pairs, 51 based on Foata normal form. 1/767 useless extension candidates. Maximal degree in co-relation 6066. Up to 719 conditions per place. [2024-06-21 18:53:21,578 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2024-06-21 18:53:21,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 204 transitions, 2300 flow [2024-06-21 18:53:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 18:53:21,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 18:53:21,579 INFO L175 Difference]: Start difference. First operand has 221 places, 189 transitions, 1836 flow. Second operand 10 states and 112 transitions. [2024-06-21 18:53:21,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 204 transitions, 2300 flow [2024-06-21 18:53:21,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 204 transitions, 2234 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:21,763 INFO L231 Difference]: Finished difference. Result has 225 places, 191 transitions, 1851 flow [2024-06-21 18:53:21,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1851, PETRI_PLACES=225, PETRI_TRANSITIONS=191} [2024-06-21 18:53:21,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 18:53:21,764 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 191 transitions, 1851 flow [2024-06-21 18:53:21,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:21,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:21,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:21,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:53:21,765 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1828683561, now seen corresponding path program 11 times [2024-06-21 18:53:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017064550] [2024-06-21 18:53:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:23,134 INFO 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 18:53:23,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017064550] [2024-06-21 18:53:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017064550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:23,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:23,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:53:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756735478] [2024-06-21 18:53:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:53:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:53:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:53:23,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:23,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 191 transitions, 1851 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 18:53:23,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:23,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:23,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:23,639 INFO L124 PetriNetUnfolderBase]: 439/782 cut-off events. [2024-06-21 18:53:23,639 INFO L125 PetriNetUnfolderBase]: For 78304/78304 co-relation queries the response was YES. [2024-06-21 18:53:23,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6343 conditions, 782 events. 439/782 cut-off events. For 78304/78304 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3576 event pairs, 52 based on Foata normal form. 1/781 useless extension candidates. Maximal degree in co-relation 6236. Up to 665 conditions per place. [2024-06-21 18:53:23,646 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 164 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-21 18:53:23,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 210 transitions, 2521 flow [2024-06-21 18:53:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 18:53:23,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 18:53:23,647 INFO L175 Difference]: Start difference. First operand has 225 places, 191 transitions, 1851 flow. Second operand 10 states and 119 transitions. [2024-06-21 18:53:23,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 210 transitions, 2521 flow [2024-06-21 18:53:23,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 210 transitions, 2456 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:23,833 INFO L231 Difference]: Finished difference. Result has 227 places, 195 transitions, 1970 flow [2024-06-21 18:53:23,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1970, PETRI_PLACES=227, PETRI_TRANSITIONS=195} [2024-06-21 18:53:23,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-21 18:53:23,833 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 195 transitions, 1970 flow [2024-06-21 18:53:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 18:53:23,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:23,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:53:23,834 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:23,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash -83915135, now seen corresponding path program 7 times [2024-06-21 18:53:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:23,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3177426] [2024-06-21 18:53:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:25,492 INFO 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 18:53:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3177426] [2024-06-21 18:53:25,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3177426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:25,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:25,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441220588] [2024-06-21 18:53:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:25,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:53:25,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 195 transitions, 1970 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 18:53:25,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:25,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:53:25,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:25,931 INFO L124 PetriNetUnfolderBase]: 428/778 cut-off events. [2024-06-21 18:53:25,931 INFO L125 PetriNetUnfolderBase]: For 87053/87054 co-relation queries the response was YES. [2024-06-21 18:53:25,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6494 conditions, 778 events. 428/778 cut-off events. For 87053/87054 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3665 event pairs, 24 based on Foata normal form. 2/776 useless extension candidates. Maximal degree in co-relation 6386. Up to 541 conditions per place. [2024-06-21 18:53:25,939 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 139 selfloop transitions, 46 changer transitions 0/215 dead transitions. [2024-06-21 18:53:25,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 215 transitions, 2555 flow [2024-06-21 18:53:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 18:53:25,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 18:53:25,941 INFO L175 Difference]: Start difference. First operand has 227 places, 195 transitions, 1970 flow. Second operand 10 states and 135 transitions. [2024-06-21 18:53:25,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 215 transitions, 2555 flow [2024-06-21 18:53:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 215 transitions, 2465 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:26,097 INFO L231 Difference]: Finished difference. Result has 230 places, 197 transitions, 2019 flow [2024-06-21 18:53:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2019, PETRI_PLACES=230, PETRI_TRANSITIONS=197} [2024-06-21 18:53:26,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 18:53:26,098 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 197 transitions, 2019 flow [2024-06-21 18:53:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 18:53:26,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:26,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:26,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:53:26,099 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:26,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1753963635, now seen corresponding path program 12 times [2024-06-21 18:53:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:26,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054105811] [2024-06-21 18:53:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:26,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:27,899 INFO 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 18:53:27,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054105811] [2024-06-21 18:53:27,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054105811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:27,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:27,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918329860] [2024-06-21 18:53:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:27,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:27,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:27,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 197 transitions, 2019 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:27,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:27,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:28,488 INFO L124 PetriNetUnfolderBase]: 455/811 cut-off events. [2024-06-21 18:53:28,488 INFO L125 PetriNetUnfolderBase]: For 83334/83334 co-relation queries the response was YES. [2024-06-21 18:53:28,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6735 conditions, 811 events. 455/811 cut-off events. For 83334/83334 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3738 event pairs, 58 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 6626. Up to 631 conditions per place. [2024-06-21 18:53:28,495 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 142 selfloop transitions, 73 changer transitions 0/217 dead transitions. [2024-06-21 18:53:28,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 217 transitions, 2841 flow [2024-06-21 18:53:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:53:28,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:53:28,496 INFO L175 Difference]: Start difference. First operand has 230 places, 197 transitions, 2019 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:53:28,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 217 transitions, 2841 flow [2024-06-21 18:53:28,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 217 transitions, 2726 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:28,698 INFO L231 Difference]: Finished difference. Result has 232 places, 203 transitions, 2153 flow [2024-06-21 18:53:28,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2153, PETRI_PLACES=232, PETRI_TRANSITIONS=203} [2024-06-21 18:53:28,699 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 18:53:28,699 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 203 transitions, 2153 flow [2024-06-21 18:53:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:28,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:28,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:28,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:53:28,700 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:28,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1688990119, now seen corresponding path program 12 times [2024-06-21 18:53:28,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:28,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584430681] [2024-06-21 18:53:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:28,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:30,000 INFO 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 18:53:30,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:30,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584430681] [2024-06-21 18:53:30,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584430681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:30,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:30,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:30,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115701024] [2024-06-21 18:53:30,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:30,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:30,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:30,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:30,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:30,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:30,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 203 transitions, 2153 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 18:53:30,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:30,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:30,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:30,346 INFO L124 PetriNetUnfolderBase]: 458/815 cut-off events. [2024-06-21 18:53:30,346 INFO L125 PetriNetUnfolderBase]: For 83337/83337 co-relation queries the response was YES. [2024-06-21 18:53:30,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6783 conditions, 815 events. 458/815 cut-off events. For 83337/83337 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3766 event pairs, 54 based on Foata normal form. 1/814 useless extension candidates. Maximal degree in co-relation 6674. Up to 698 conditions per place. [2024-06-21 18:53:30,354 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 168 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-06-21 18:53:30,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 221 transitions, 2805 flow [2024-06-21 18:53:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 18:53:30,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 18:53:30,354 INFO L175 Difference]: Start difference. First operand has 232 places, 203 transitions, 2153 flow. Second operand 9 states and 121 transitions. [2024-06-21 18:53:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 221 transitions, 2805 flow [2024-06-21 18:53:30,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 221 transitions, 2650 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:30,572 INFO L231 Difference]: Finished difference. Result has 235 places, 205 transitions, 2151 flow [2024-06-21 18:53:30,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=235, PETRI_TRANSITIONS=205} [2024-06-21 18:53:30,573 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 18:53:30,573 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 205 transitions, 2151 flow [2024-06-21 18:53:30,573 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 18:53:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:30,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:30,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:53:30,574 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:30,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash -941835683, now seen corresponding path program 8 times [2024-06-21 18:53:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:30,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586450102] [2024-06-21 18:53:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:30,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:32,000 INFO 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 18:53:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:32,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586450102] [2024-06-21 18:53:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586450102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:32,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:32,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:32,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686192179] [2024-06-21 18:53:32,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:32,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:32,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:32,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 205 transitions, 2151 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 18:53:32,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:32,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:32,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:32,389 INFO L124 PetriNetUnfolderBase]: 462/823 cut-off events. [2024-06-21 18:53:32,389 INFO L125 PetriNetUnfolderBase]: For 87855/87855 co-relation queries the response was YES. [2024-06-21 18:53:32,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 823 events. 462/823 cut-off events. For 87855/87855 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3836 event pairs, 55 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 6715. Up to 720 conditions per place. [2024-06-21 18:53:32,395 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 179 selfloop transitions, 41 changer transitions 0/222 dead transitions. [2024-06-21 18:53:32,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 222 transitions, 2654 flow [2024-06-21 18:53:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 18:53:32,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 18:53:32,397 INFO L175 Difference]: Start difference. First operand has 235 places, 205 transitions, 2151 flow. Second operand 9 states and 118 transitions. [2024-06-21 18:53:32,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 222 transitions, 2654 flow [2024-06-21 18:53:32,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 222 transitions, 2544 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:32,594 INFO L231 Difference]: Finished difference. Result has 237 places, 206 transitions, 2156 flow [2024-06-21 18:53:32,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=237, PETRI_TRANSITIONS=206} [2024-06-21 18:53:32,595 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 18:53:32,595 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 206 transitions, 2156 flow [2024-06-21 18:53:32,595 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 18:53:32,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:32,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:32,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:53:32,596 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -855020059, now seen corresponding path program 13 times [2024-06-21 18:53:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:32,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61164465] [2024-06-21 18:53:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:33,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61164465] [2024-06-21 18:53:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61164465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:33,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597446491] [2024-06-21 18:53:33,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:33,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:33,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 206 transitions, 2156 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 18:53:33,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:33,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:33,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:34,274 INFO L124 PetriNetUnfolderBase]: 465/828 cut-off events. [2024-06-21 18:53:34,274 INFO L125 PetriNetUnfolderBase]: For 85679/85679 co-relation queries the response was YES. [2024-06-21 18:53:34,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6852 conditions, 828 events. 465/828 cut-off events. For 85679/85679 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3861 event pairs, 64 based on Foata normal form. 1/827 useless extension candidates. Maximal degree in co-relation 6743. Up to 762 conditions per place. [2024-06-21 18:53:34,281 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 185 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-21 18:53:34,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 220 transitions, 2658 flow [2024-06-21 18:53:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 18:53:34,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 18:53:34,283 INFO L175 Difference]: Start difference. First operand has 237 places, 206 transitions, 2156 flow. Second operand 9 states and 111 transitions. [2024-06-21 18:53:34,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 220 transitions, 2658 flow [2024-06-21 18:53:34,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 220 transitions, 2562 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:34,463 INFO L231 Difference]: Finished difference. Result has 238 places, 208 transitions, 2175 flow [2024-06-21 18:53:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2175, PETRI_PLACES=238, PETRI_TRANSITIONS=208} [2024-06-21 18:53:34,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 18:53:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 208 transitions, 2175 flow [2024-06-21 18:53:34,463 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 18:53:34,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:53:34,464 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -855168983, now seen corresponding path program 9 times [2024-06-21 18:53:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:34,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86673377] [2024-06-21 18:53:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:35,962 INFO 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 18:53:35,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86673377] [2024-06-21 18:53:35,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86673377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:35,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:35,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:35,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44920377] [2024-06-21 18:53:35,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:36,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:53:36,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 208 transitions, 2175 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 18:53:36,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:36,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:53:36,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:36,386 INFO L124 PetriNetUnfolderBase]: 443/804 cut-off events. [2024-06-21 18:53:36,386 INFO L125 PetriNetUnfolderBase]: For 86891/86892 co-relation queries the response was YES. [2024-06-21 18:53:36,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6603 conditions, 804 events. 443/804 cut-off events. For 86891/86892 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3833 event pairs, 58 based on Foata normal form. 2/802 useless extension candidates. Maximal degree in co-relation 6493. Up to 669 conditions per place. [2024-06-21 18:53:36,393 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 161 selfloop transitions, 28 changer transitions 0/221 dead transitions. [2024-06-21 18:53:36,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 221 transitions, 2585 flow [2024-06-21 18:53:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:53:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:53:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-21 18:53:36,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2024-06-21 18:53:36,394 INFO L175 Difference]: Start difference. First operand has 238 places, 208 transitions, 2175 flow. Second operand 8 states and 111 transitions. [2024-06-21 18:53:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 221 transitions, 2585 flow [2024-06-21 18:53:36,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 221 transitions, 2483 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:36,547 INFO L231 Difference]: Finished difference. Result has 238 places, 208 transitions, 2135 flow [2024-06-21 18:53:36,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2135, PETRI_PLACES=238, PETRI_TRANSITIONS=208} [2024-06-21 18:53:36,547 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 18:53:36,547 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 208 transitions, 2135 flow [2024-06-21 18:53:36,547 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 18:53:36,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:36,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:36,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:53:36,548 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:36,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -571373275, now seen corresponding path program 13 times [2024-06-21 18:53:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:36,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486747587] [2024-06-21 18:53:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:36,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:38,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486747587] [2024-06-21 18:53:38,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486747587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:38,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:38,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:38,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027678516] [2024-06-21 18:53:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:38,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:38,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:38,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:38,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:38,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:38,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 208 transitions, 2135 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:38,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:38,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:38,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:39,028 INFO L124 PetriNetUnfolderBase]: 465/829 cut-off events. [2024-06-21 18:53:39,028 INFO L125 PetriNetUnfolderBase]: For 80518/80518 co-relation queries the response was YES. [2024-06-21 18:53:39,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6624 conditions, 829 events. 465/829 cut-off events. For 80518/80518 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3875 event pairs, 57 based on Foata normal form. 1/828 useless extension candidates. Maximal degree in co-relation 6515. Up to 648 conditions per place. [2024-06-21 18:53:39,035 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 149 selfloop transitions, 73 changer transitions 0/224 dead transitions. [2024-06-21 18:53:39,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 224 transitions, 2911 flow [2024-06-21 18:53:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 18:53:39,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:53:39,036 INFO L175 Difference]: Start difference. First operand has 238 places, 208 transitions, 2135 flow. Second operand 10 states and 124 transitions. [2024-06-21 18:53:39,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 224 transitions, 2911 flow [2024-06-21 18:53:39,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 224 transitions, 2833 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:39,216 INFO L231 Difference]: Finished difference. Result has 240 places, 210 transitions, 2238 flow [2024-06-21 18:53:39,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2238, PETRI_PLACES=240, PETRI_TRANSITIONS=210} [2024-06-21 18:53:39,217 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 18:53:39,217 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 210 transitions, 2238 flow [2024-06-21 18:53:39,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:39,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:39,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:39,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:53:39,217 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:39,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1686188773, now seen corresponding path program 14 times [2024-06-21 18:53:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:39,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694474402] [2024-06-21 18:53:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:40,810 INFO 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 18:53:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:40,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694474402] [2024-06-21 18:53:40,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694474402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:40,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135582164] [2024-06-21 18:53:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:40,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:40,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 210 transitions, 2238 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:40,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:40,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:41,397 INFO L124 PetriNetUnfolderBase]: 463/825 cut-off events. [2024-06-21 18:53:41,398 INFO L125 PetriNetUnfolderBase]: For 78308/78308 co-relation queries the response was YES. [2024-06-21 18:53:41,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6600 conditions, 825 events. 463/825 cut-off events. For 78308/78308 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3857 event pairs, 63 based on Foata normal form. 1/824 useless extension candidates. Maximal degree in co-relation 6490. Up to 758 conditions per place. [2024-06-21 18:53:41,405 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 32 changer transitions 0/225 dead transitions. [2024-06-21 18:53:41,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 225 transitions, 2722 flow [2024-06-21 18:53:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:53:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:53:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 18:53:41,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 18:53:41,406 INFO L175 Difference]: Start difference. First operand has 240 places, 210 transitions, 2238 flow. Second operand 11 states and 123 transitions. [2024-06-21 18:53:41,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 225 transitions, 2722 flow [2024-06-21 18:53:41,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 225 transitions, 2566 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:53:41,589 INFO L231 Difference]: Finished difference. Result has 244 places, 210 transitions, 2151 flow [2024-06-21 18:53:41,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2151, PETRI_PLACES=244, PETRI_TRANSITIONS=210} [2024-06-21 18:53:41,590 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 18:53:41,590 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 210 transitions, 2151 flow [2024-06-21 18:53:41,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:41,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:41,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:41,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:53:41,591 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:41,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1977076913, now seen corresponding path program 14 times [2024-06-21 18:53:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764290500] [2024-06-21 18:53:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:42,894 INFO 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 18:53:42,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:42,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764290500] [2024-06-21 18:53:42,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764290500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:42,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:42,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105203429] [2024-06-21 18:53:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:42,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:42,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 210 transitions, 2151 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 18:53:42,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:42,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:43,323 INFO L124 PetriNetUnfolderBase]: 461/822 cut-off events. [2024-06-21 18:53:43,323 INFO L125 PetriNetUnfolderBase]: For 77951/77951 co-relation queries the response was YES. [2024-06-21 18:53:43,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6444 conditions, 822 events. 461/822 cut-off events. For 77951/77951 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3856 event pairs, 61 based on Foata normal form. 1/821 useless extension candidates. Maximal degree in co-relation 6333. Up to 742 conditions per place. [2024-06-21 18:53:43,329 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 182 selfloop transitions, 38 changer transitions 0/222 dead transitions. [2024-06-21 18:53:43,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 222 transitions, 2621 flow [2024-06-21 18:53:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 18:53:43,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 18:53:43,330 INFO L175 Difference]: Start difference. First operand has 244 places, 210 transitions, 2151 flow. Second operand 9 states and 113 transitions. [2024-06-21 18:53:43,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 222 transitions, 2621 flow [2024-06-21 18:53:43,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 222 transitions, 2487 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 18:53:43,526 INFO L231 Difference]: Finished difference. Result has 242 places, 210 transitions, 2101 flow [2024-06-21 18:53:43,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2101, PETRI_PLACES=242, PETRI_TRANSITIONS=210} [2024-06-21 18:53:43,527 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 18:53:43,527 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 210 transitions, 2101 flow [2024-06-21 18:53:43,527 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 18:53:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:43,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:43,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:53:43,528 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:43,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash 891527987, now seen corresponding path program 2 times [2024-06-21 18:53:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537593111] [2024-06-21 18:53:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:44,989 INFO 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 18:53:44,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:44,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537593111] [2024-06-21 18:53:44,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537593111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:44,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:44,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:44,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234731655] [2024-06-21 18:53:44,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:44,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:45,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:45,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 210 transitions, 2101 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:45,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:45,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:45,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:45,551 INFO L124 PetriNetUnfolderBase]: 462/824 cut-off events. [2024-06-21 18:53:45,552 INFO L125 PetriNetUnfolderBase]: For 80126/80126 co-relation queries the response was YES. [2024-06-21 18:53:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6363 conditions, 824 events. 462/824 cut-off events. For 80126/80126 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3859 event pairs, 76 based on Foata normal form. 2/824 useless extension candidates. Maximal degree in co-relation 6252. Up to 715 conditions per place. [2024-06-21 18:53:45,557 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 188 selfloop transitions, 42 changer transitions 0/232 dead transitions. [2024-06-21 18:53:45,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 232 transitions, 2811 flow [2024-06-21 18:53:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 18:53:45,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:53:45,561 INFO L175 Difference]: Start difference. First operand has 242 places, 210 transitions, 2101 flow. Second operand 10 states and 120 transitions. [2024-06-21 18:53:45,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 232 transitions, 2811 flow [2024-06-21 18:53:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 232 transitions, 2702 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:45,738 INFO L231 Difference]: Finished difference. Result has 245 places, 217 transitions, 2200 flow [2024-06-21 18:53:45,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2200, PETRI_PLACES=245, PETRI_TRANSITIONS=217} [2024-06-21 18:53:45,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 18:53:45,739 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 217 transitions, 2200 flow [2024-06-21 18:53:45,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:45,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:45,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:53:45,739 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1753963449, now seen corresponding path program 15 times [2024-06-21 18:53:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:45,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777458397] [2024-06-21 18:53:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:47,357 INFO 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 18:53:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777458397] [2024-06-21 18:53:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777458397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767837935] [2024-06-21 18:53:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:47,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:47,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 217 transitions, 2200 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:47,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:47,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:47,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:47,886 INFO L124 PetriNetUnfolderBase]: 465/829 cut-off events. [2024-06-21 18:53:47,886 INFO L125 PetriNetUnfolderBase]: For 78039/78039 co-relation queries the response was YES. [2024-06-21 18:53:47,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6523 conditions, 829 events. 465/829 cut-off events. For 78039/78039 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 3873 event pairs, 56 based on Foata normal form. 1/828 useless extension candidates. Maximal degree in co-relation 6410. Up to 708 conditions per place. [2024-06-21 18:53:47,893 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 168 selfloop transitions, 59 changer transitions 0/229 dead transitions. [2024-06-21 18:53:47,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 2720 flow [2024-06-21 18:53:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 18:53:47,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 18:53:47,894 INFO L175 Difference]: Start difference. First operand has 245 places, 217 transitions, 2200 flow. Second operand 9 states and 115 transitions. [2024-06-21 18:53:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 2720 flow [2024-06-21 18:53:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 229 transitions, 2678 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:53:48,084 INFO L231 Difference]: Finished difference. Result has 249 places, 219 transitions, 2330 flow [2024-06-21 18:53:48,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2330, PETRI_PLACES=249, PETRI_TRANSITIONS=219} [2024-06-21 18:53:48,085 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 18:53:48,085 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 219 transitions, 2330 flow [2024-06-21 18:53:48,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:48,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:48,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:48,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:53:48,086 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:48,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1753785695, now seen corresponding path program 10 times [2024-06-21 18:53:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979856609] [2024-06-21 18:53:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:49,637 INFO 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 18:53:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979856609] [2024-06-21 18:53:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979856609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462000897] [2024-06-21 18:53:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:49,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:49,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:53:49,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 219 transitions, 2330 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 18:53:49,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:49,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:53:49,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:50,119 INFO L124 PetriNetUnfolderBase]: 442/804 cut-off events. [2024-06-21 18:53:50,119 INFO L125 PetriNetUnfolderBase]: For 78017/78017 co-relation queries the response was YES. [2024-06-21 18:53:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6355 conditions, 804 events. 442/804 cut-off events. For 78017/78017 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 3829 event pairs, 52 based on Foata normal form. 2/804 useless extension candidates. Maximal degree in co-relation 6239. Up to 647 conditions per place. [2024-06-21 18:53:50,125 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 159 selfloop transitions, 38 changer transitions 0/230 dead transitions. [2024-06-21 18:53:50,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 230 transitions, 2750 flow [2024-06-21 18:53:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 18:53:50,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 18:53:50,126 INFO L175 Difference]: Start difference. First operand has 249 places, 219 transitions, 2330 flow. Second operand 9 states and 120 transitions. [2024-06-21 18:53:50,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 230 transitions, 2750 flow [2024-06-21 18:53:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 230 transitions, 2599 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:50,305 INFO L231 Difference]: Finished difference. Result has 250 places, 219 transitions, 2261 flow [2024-06-21 18:53:50,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2261, PETRI_PLACES=250, PETRI_TRANSITIONS=219} [2024-06-21 18:53:50,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 18:53:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 219 transitions, 2261 flow [2024-06-21 18:53:50,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 18:53:50,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:50,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:50,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:53:50,306 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:50,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1753790469, now seen corresponding path program 16 times [2024-06-21 18:53:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798523409] [2024-06-21 18:53:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:50,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:51,868 INFO 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 18:53:51,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:51,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798523409] [2024-06-21 18:53:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798523409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:51,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:51,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726941522] [2024-06-21 18:53:51,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:52,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:52,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 219 transitions, 2261 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:52,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:52,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:52,403 INFO L124 PetriNetUnfolderBase]: 465/829 cut-off events. [2024-06-21 18:53:52,403 INFO L125 PetriNetUnfolderBase]: For 75150/75150 co-relation queries the response was YES. [2024-06-21 18:53:52,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 829 events. 465/829 cut-off events. For 75150/75150 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3878 event pairs, 55 based on Foata normal form. 1/828 useless extension candidates. Maximal degree in co-relation 6336. Up to 708 conditions per place. [2024-06-21 18:53:52,411 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 173 selfloop transitions, 56 changer transitions 0/231 dead transitions. [2024-06-21 18:53:52,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 231 transitions, 2789 flow [2024-06-21 18:53:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 18:53:52,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 18:53:52,411 INFO L175 Difference]: Start difference. First operand has 250 places, 219 transitions, 2261 flow. Second operand 9 states and 116 transitions. [2024-06-21 18:53:52,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 231 transitions, 2789 flow [2024-06-21 18:53:52,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 231 transitions, 2630 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:52,599 INFO L231 Difference]: Finished difference. Result has 250 places, 221 transitions, 2272 flow [2024-06-21 18:53:52,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2272, PETRI_PLACES=250, PETRI_TRANSITIONS=221} [2024-06-21 18:53:52,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 18:53:52,600 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 221 transitions, 2272 flow [2024-06-21 18:53:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:52,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:52,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:53:52,600 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:52,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1753785819, now seen corresponding path program 17 times [2024-06-21 18:53:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:52,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743508994] [2024-06-21 18:53:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743508994] [2024-06-21 18:53:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743508994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:54,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722336147] [2024-06-21 18:53:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:54,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:53:54,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 221 transitions, 2272 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:54,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:54,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:53:54,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:54,528 INFO L124 PetriNetUnfolderBase]: 463/826 cut-off events. [2024-06-21 18:53:54,528 INFO L125 PetriNetUnfolderBase]: For 72351/72351 co-relation queries the response was YES. [2024-06-21 18:53:54,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 826 events. 463/826 cut-off events. For 72351/72351 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3868 event pairs, 55 based on Foata normal form. 1/825 useless extension candidates. Maximal degree in co-relation 6175. Up to 687 conditions per place. [2024-06-21 18:53:54,536 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 165 selfloop transitions, 66 changer transitions 0/233 dead transitions. [2024-06-21 18:53:54,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 233 transitions, 2808 flow [2024-06-21 18:53:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 18:53:54,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 18:53:54,537 INFO L175 Difference]: Start difference. First operand has 250 places, 221 transitions, 2272 flow. Second operand 9 states and 117 transitions. [2024-06-21 18:53:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 233 transitions, 2808 flow [2024-06-21 18:53:54,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 233 transitions, 2592 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-21 18:53:54,720 INFO L231 Difference]: Finished difference. Result has 248 places, 223 transitions, 2250 flow [2024-06-21 18:53:54,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2250, PETRI_PLACES=248, PETRI_TRANSITIONS=223} [2024-06-21 18:53:54,721 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 18:53:54,721 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 223 transitions, 2250 flow [2024-06-21 18:53:54,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:54,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:54,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:53:54,721 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:54,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash 891527739, now seen corresponding path program 15 times [2024-06-21 18:53:54,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:54,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640890431] [2024-06-21 18:53:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:54,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:56,524 INFO 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 18:53:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640890431] [2024-06-21 18:53:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640890431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:56,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047599563] [2024-06-21 18:53:56,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:56,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:56,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 223 transitions, 2250 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:56,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:56,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:56,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:57,214 INFO L124 PetriNetUnfolderBase]: 461/824 cut-off events. [2024-06-21 18:53:57,214 INFO L125 PetriNetUnfolderBase]: For 69288/69288 co-relation queries the response was YES. [2024-06-21 18:53:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6036 conditions, 824 events. 461/824 cut-off events. For 69288/69288 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3872 event pairs, 56 based on Foata normal form. 1/823 useless extension candidates. Maximal degree in co-relation 5923. Up to 645 conditions per place. [2024-06-21 18:53:57,221 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 155 selfloop transitions, 78 changer transitions 0/235 dead transitions. [2024-06-21 18:53:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 235 transitions, 2746 flow [2024-06-21 18:53:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 18:53:57,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:53:57,222 INFO L175 Difference]: Start difference. First operand has 248 places, 223 transitions, 2250 flow. Second operand 10 states and 120 transitions. [2024-06-21 18:53:57,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 235 transitions, 2746 flow [2024-06-21 18:53:57,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 235 transitions, 2558 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 18:53:57,372 INFO L231 Difference]: Finished difference. Result has 249 places, 223 transitions, 2223 flow [2024-06-21 18:53:57,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2223, PETRI_PLACES=249, PETRI_TRANSITIONS=223} [2024-06-21 18:53:57,372 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 18:53:57,372 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 223 transitions, 2223 flow [2024-06-21 18:53:57,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 18:53:57,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:57,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:57,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:53:57,373 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:53:57,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash 408346647, now seen corresponding path program 1 times [2024-06-21 18:53:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:57,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310401285] [2024-06-21 18:53:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:59,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310401285] [2024-06-21 18:53:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310401285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:59,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:59,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485057876] [2024-06-21 18:53:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:59,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:53:59,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 223 transitions, 2223 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:53:59,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:59,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:53:59,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:00,372 INFO L124 PetriNetUnfolderBase]: 458/818 cut-off events. [2024-06-21 18:54:00,372 INFO L125 PetriNetUnfolderBase]: For 66634/66634 co-relation queries the response was YES. [2024-06-21 18:54:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 818 events. 458/818 cut-off events. For 66634/66634 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3826 event pairs, 92 based on Foata normal form. 2/818 useless extension candidates. Maximal degree in co-relation 5730. Up to 784 conditions per place. [2024-06-21 18:54:00,378 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 214 selfloop transitions, 16 changer transitions 0/232 dead transitions. [2024-06-21 18:54:00,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 232 transitions, 2703 flow [2024-06-21 18:54:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 18:54:00,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 18:54:00,379 INFO L175 Difference]: Start difference. First operand has 249 places, 223 transitions, 2223 flow. Second operand 10 states and 103 transitions. [2024-06-21 18:54:00,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 232 transitions, 2703 flow [2024-06-21 18:54:00,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 232 transitions, 2542 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:00,523 INFO L231 Difference]: Finished difference. Result has 250 places, 223 transitions, 2098 flow [2024-06-21 18:54:00,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2098, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2024-06-21 18:54:00,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 18:54:00,523 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 2098 flow [2024-06-21 18:54:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:00,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:54:00,523 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1390384101, now seen corresponding path program 1 times [2024-06-21 18:54:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247513810] [2024-06-21 18:54:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:02,187 INFO 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 18:54:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247513810] [2024-06-21 18:54:02,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247513810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:02,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:02,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978978539] [2024-06-21 18:54:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:02,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:02,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 223 transitions, 2098 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:02,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:02,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:02,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:02,804 INFO L124 PetriNetUnfolderBase]: 469/840 cut-off events. [2024-06-21 18:54:02,804 INFO L125 PetriNetUnfolderBase]: For 74448/74448 co-relation queries the response was YES. [2024-06-21 18:54:02,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 840 events. 469/840 cut-off events. For 74448/74448 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4003 event pairs, 87 based on Foata normal form. 2/840 useless extension candidates. Maximal degree in co-relation 5937. Up to 731 conditions per place. [2024-06-21 18:54:02,811 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 215 selfloop transitions, 26 changer transitions 0/243 dead transitions. [2024-06-21 18:54:02,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 243 transitions, 2822 flow [2024-06-21 18:54:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:54:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:54:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 18:54:02,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 18:54:02,812 INFO L175 Difference]: Start difference. First operand has 250 places, 223 transitions, 2098 flow. Second operand 12 states and 131 transitions. [2024-06-21 18:54:02,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 243 transitions, 2822 flow [2024-06-21 18:54:02,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 243 transitions, 2784 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:02,967 INFO L231 Difference]: Finished difference. Result has 254 places, 225 transitions, 2170 flow [2024-06-21 18:54:02,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2170, PETRI_PLACES=254, PETRI_TRANSITIONS=225} [2024-06-21 18:54:02,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-21 18:54:02,968 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 225 transitions, 2170 flow [2024-06-21 18:54:02,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:02,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:02,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:02,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:54:02,968 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:02,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1392258051, now seen corresponding path program 2 times [2024-06-21 18:54:02,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:02,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359304469] [2024-06-21 18:54:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:02,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:04,630 INFO 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 18:54:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359304469] [2024-06-21 18:54:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359304469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:04,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:04,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073602626] [2024-06-21 18:54:04,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:04,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:04,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:04,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:04,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 225 transitions, 2170 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:04,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:04,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:04,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:05,175 INFO L124 PetriNetUnfolderBase]: 480/861 cut-off events. [2024-06-21 18:54:05,176 INFO L125 PetriNetUnfolderBase]: For 82015/82015 co-relation queries the response was YES. [2024-06-21 18:54:05,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 861 events. 480/861 cut-off events. For 82015/82015 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4149 event pairs, 92 based on Foata normal form. 2/861 useless extension candidates. Maximal degree in co-relation 6308. Up to 788 conditions per place. [2024-06-21 18:54:05,183 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 215 selfloop transitions, 26 changer transitions 0/243 dead transitions. [2024-06-21 18:54:05,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 243 transitions, 2894 flow [2024-06-21 18:54:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:54:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:54:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 18:54:05,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 18:54:05,184 INFO L175 Difference]: Start difference. First operand has 254 places, 225 transitions, 2170 flow. Second operand 12 states and 130 transitions. [2024-06-21 18:54:05,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 243 transitions, 2894 flow [2024-06-21 18:54:05,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 243 transitions, 2808 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:05,360 INFO L231 Difference]: Finished difference. Result has 258 places, 227 transitions, 2198 flow [2024-06-21 18:54:05,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2198, PETRI_PLACES=258, PETRI_TRANSITIONS=227} [2024-06-21 18:54:05,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-21 18:54:05,360 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 227 transitions, 2198 flow [2024-06-21 18:54:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:05,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:05,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:05,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:54:05,361 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:05,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1392261926, now seen corresponding path program 1 times [2024-06-21 18:54:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:05,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789700772] [2024-06-21 18:54:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:05,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:06,867 INFO 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 18:54:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:06,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789700772] [2024-06-21 18:54:06,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789700772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:06,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943619887] [2024-06-21 18:54:06,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:06,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:06,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:06,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 227 transitions, 2198 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:06,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:06,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:06,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:07,358 INFO L124 PetriNetUnfolderBase]: 488/874 cut-off events. [2024-06-21 18:54:07,358 INFO L125 PetriNetUnfolderBase]: For 84488/84488 co-relation queries the response was YES. [2024-06-21 18:54:07,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6533 conditions, 874 events. 488/874 cut-off events. For 84488/84488 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4215 event pairs, 93 based on Foata normal form. 1/873 useless extension candidates. Maximal degree in co-relation 6417. Up to 810 conditions per place. [2024-06-21 18:54:07,365 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 216 selfloop transitions, 27 changer transitions 0/245 dead transitions. [2024-06-21 18:54:07,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 245 transitions, 2924 flow [2024-06-21 18:54:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 18:54:07,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 18:54:07,367 INFO L175 Difference]: Start difference. First operand has 258 places, 227 transitions, 2198 flow. Second operand 11 states and 124 transitions. [2024-06-21 18:54:07,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 245 transitions, 2924 flow [2024-06-21 18:54:07,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 245 transitions, 2878 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:07,600 INFO L231 Difference]: Finished difference. Result has 261 places, 231 transitions, 2271 flow [2024-06-21 18:54:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2271, PETRI_PLACES=261, PETRI_TRANSITIONS=231} [2024-06-21 18:54:07,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 18:54:07,600 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 231 transitions, 2271 flow [2024-06-21 18:54:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:07,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:54:07,601 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:07,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1392261771, now seen corresponding path program 3 times [2024-06-21 18:54:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:07,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77226563] [2024-06-21 18:54:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:07,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:09,302 INFO 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 18:54:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77226563] [2024-06-21 18:54:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77226563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:09,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:09,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065571112] [2024-06-21 18:54:09,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:09,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:09,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 231 transitions, 2271 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:09,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:09,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:09,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:09,875 INFO L124 PetriNetUnfolderBase]: 485/869 cut-off events. [2024-06-21 18:54:09,875 INFO L125 PetriNetUnfolderBase]: For 83913/83913 co-relation queries the response was YES. [2024-06-21 18:54:09,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6423 conditions, 869 events. 485/869 cut-off events. For 83913/83913 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4160 event pairs, 92 based on Foata normal form. 2/869 useless extension candidates. Maximal degree in co-relation 6305. Up to 813 conditions per place. [2024-06-21 18:54:09,882 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 218 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-21 18:54:09,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 245 transitions, 2793 flow [2024-06-21 18:54:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:54:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:54:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 18:54:09,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 18:54:09,883 INFO L175 Difference]: Start difference. First operand has 261 places, 231 transitions, 2271 flow. Second operand 12 states and 127 transitions. [2024-06-21 18:54:09,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 245 transitions, 2793 flow [2024-06-21 18:54:10,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 245 transitions, 2719 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 18:54:10,090 INFO L231 Difference]: Finished difference. Result has 266 places, 231 transitions, 2251 flow [2024-06-21 18:54:10,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2251, PETRI_PLACES=266, PETRI_TRANSITIONS=231} [2024-06-21 18:54:10,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 18:54:10,091 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 231 transitions, 2251 flow [2024-06-21 18:54:10,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:10,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:10,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:10,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:54:10,091 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:10,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1479097731, now seen corresponding path program 4 times [2024-06-21 18:54:10,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:10,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977751803] [2024-06-21 18:54:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:10,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:11,702 INFO 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 18:54:11,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:11,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977751803] [2024-06-21 18:54:11,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977751803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:11,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:11,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:11,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000238172] [2024-06-21 18:54:11,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:11,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:11,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:11,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:11,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 231 transitions, 2251 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:11,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:11,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:12,262 INFO L124 PetriNetUnfolderBase]: 489/877 cut-off events. [2024-06-21 18:54:12,263 INFO L125 PetriNetUnfolderBase]: For 85932/85932 co-relation queries the response was YES. [2024-06-21 18:54:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 877 events. 489/877 cut-off events. For 85932/85932 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4229 event pairs, 94 based on Foata normal form. 2/877 useless extension candidates. Maximal degree in co-relation 6363. Up to 838 conditions per place. [2024-06-21 18:54:12,270 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 225 selfloop transitions, 17 changer transitions 0/244 dead transitions. [2024-06-21 18:54:12,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 244 transitions, 2785 flow [2024-06-21 18:54:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 18:54:12,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-21 18:54:12,271 INFO L175 Difference]: Start difference. First operand has 266 places, 231 transitions, 2251 flow. Second operand 11 states and 114 transitions. [2024-06-21 18:54:12,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 244 transitions, 2785 flow [2024-06-21 18:54:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 244 transitions, 2733 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 18:54:12,483 INFO L231 Difference]: Finished difference. Result has 266 places, 232 transitions, 2259 flow [2024-06-21 18:54:12,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2259, PETRI_PLACES=266, PETRI_TRANSITIONS=232} [2024-06-21 18:54:12,483 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 18:54:12,483 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 232 transitions, 2259 flow [2024-06-21 18:54:12,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:12,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:12,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:54:12,484 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:12,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1295981456, now seen corresponding path program 2 times [2024-06-21 18:54:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:12,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786554197] [2024-06-21 18:54:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:13,858 INFO 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 18:54:13,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:13,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786554197] [2024-06-21 18:54:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786554197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:13,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:13,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:13,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396905273] [2024-06-21 18:54:13,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:13,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:13,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:13,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 232 transitions, 2259 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:13,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:13,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:13,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:14,343 INFO L124 PetriNetUnfolderBase]: 492/882 cut-off events. [2024-06-21 18:54:14,343 INFO L125 PetriNetUnfolderBase]: For 85230/85230 co-relation queries the response was YES. [2024-06-21 18:54:14,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6534 conditions, 882 events. 492/882 cut-off events. For 85230/85230 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4289 event pairs, 94 based on Foata normal form. 1/881 useless extension candidates. Maximal degree in co-relation 6413. Up to 846 conditions per place. [2024-06-21 18:54:14,351 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 18 changer transitions 0/245 dead transitions. [2024-06-21 18:54:14,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 245 transitions, 2799 flow [2024-06-21 18:54:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 18:54:14,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 18:54:14,352 INFO L175 Difference]: Start difference. First operand has 266 places, 232 transitions, 2259 flow. Second operand 10 states and 108 transitions. [2024-06-21 18:54:14,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 245 transitions, 2799 flow [2024-06-21 18:54:14,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 245 transitions, 2751 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:14,562 INFO L231 Difference]: Finished difference. Result has 267 places, 234 transitions, 2282 flow [2024-06-21 18:54:14,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2282, PETRI_PLACES=267, PETRI_TRANSITIONS=234} [2024-06-21 18:54:14,563 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 18:54:14,563 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 234 transitions, 2282 flow [2024-06-21 18:54:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:14,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:14,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:54:14,563 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:14,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2139511084, now seen corresponding path program 3 times [2024-06-21 18:54:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549797978] [2024-06-21 18:54:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:16,138 INFO 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 18:54:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:16,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549797978] [2024-06-21 18:54:16,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549797978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207914010] [2024-06-21 18:54:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:16,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:16,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 234 transitions, 2282 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:16,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:16,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:16,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:16,623 INFO L124 PetriNetUnfolderBase]: 495/887 cut-off events. [2024-06-21 18:54:16,623 INFO L125 PetriNetUnfolderBase]: For 87352/87352 co-relation queries the response was YES. [2024-06-21 18:54:16,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6578 conditions, 887 events. 495/887 cut-off events. For 87352/87352 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4298 event pairs, 94 based on Foata normal form. 1/886 useless extension candidates. Maximal degree in co-relation 6456. Up to 845 conditions per place. [2024-06-21 18:54:16,631 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 224 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2024-06-21 18:54:16,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 247 transitions, 2830 flow [2024-06-21 18:54:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 18:54:16,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 18:54:16,632 INFO L175 Difference]: Start difference. First operand has 267 places, 234 transitions, 2282 flow. Second operand 11 states and 116 transitions. [2024-06-21 18:54:16,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 247 transitions, 2830 flow [2024-06-21 18:54:16,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 247 transitions, 2777 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:16,838 INFO L231 Difference]: Finished difference. Result has 270 places, 236 transitions, 2310 flow [2024-06-21 18:54:16,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2310, PETRI_PLACES=270, PETRI_TRANSITIONS=236} [2024-06-21 18:54:16,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 18:54:16,839 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 236 transitions, 2310 flow [2024-06-21 18:54:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:16,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:16,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:16,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:54:16,839 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:16,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1296135061, now seen corresponding path program 5 times [2024-06-21 18:54:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:16,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622186213] [2024-06-21 18:54:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:18,403 INFO 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 18:54:18,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622186213] [2024-06-21 18:54:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622186213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:18,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409382551] [2024-06-21 18:54:18,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:18,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:18,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 236 transitions, 2310 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:18,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:18,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:18,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:18,925 INFO L124 PetriNetUnfolderBase]: 499/895 cut-off events. [2024-06-21 18:54:18,925 INFO L125 PetriNetUnfolderBase]: For 92844/92844 co-relation queries the response was YES. [2024-06-21 18:54:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6662 conditions, 895 events. 499/895 cut-off events. For 92844/92844 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4358 event pairs, 92 based on Foata normal form. 2/895 useless extension candidates. Maximal degree in co-relation 6539. Up to 827 conditions per place. [2024-06-21 18:54:18,933 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 22 changer transitions 0/251 dead transitions. [2024-06-21 18:54:18,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 251 transitions, 3022 flow [2024-06-21 18:54:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 18:54:18,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 18:54:18,934 INFO L175 Difference]: Start difference. First operand has 270 places, 236 transitions, 2310 flow. Second operand 10 states and 112 transitions. [2024-06-21 18:54:18,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 251 transitions, 3022 flow [2024-06-21 18:54:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 251 transitions, 2961 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:19,159 INFO L231 Difference]: Finished difference. Result has 271 places, 237 transitions, 2319 flow [2024-06-21 18:54:19,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2319, PETRI_PLACES=271, PETRI_TRANSITIONS=237} [2024-06-21 18:54:19,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-21 18:54:19,160 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 237 transitions, 2319 flow [2024-06-21 18:54:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:19,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:19,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:54:19,160 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1296131186, now seen corresponding path program 4 times [2024-06-21 18:54:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629457170] [2024-06-21 18:54:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:20,682 INFO 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 18:54:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:20,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629457170] [2024-06-21 18:54:20,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629457170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:20,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:20,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72802112] [2024-06-21 18:54:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:20,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:20,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:20,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:20,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 237 transitions, 2319 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:20,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:20,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:20,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:21,303 INFO L124 PetriNetUnfolderBase]: 497/892 cut-off events. [2024-06-21 18:54:21,304 INFO L125 PetriNetUnfolderBase]: For 88778/88778 co-relation queries the response was YES. [2024-06-21 18:54:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 892 events. 497/892 cut-off events. For 88778/88778 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4346 event pairs, 94 based on Foata normal form. 1/891 useless extension candidates. Maximal degree in co-relation 6461. Up to 841 conditions per place. [2024-06-21 18:54:21,312 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 221 selfloop transitions, 25 changer transitions 0/248 dead transitions. [2024-06-21 18:54:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 248 transitions, 2839 flow [2024-06-21 18:54:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 18:54:21,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 18:54:21,314 INFO L175 Difference]: Start difference. First operand has 271 places, 237 transitions, 2319 flow. Second operand 11 states and 118 transitions. [2024-06-21 18:54:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 248 transitions, 2839 flow [2024-06-21 18:54:21,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 248 transitions, 2743 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:21,565 INFO L231 Difference]: Finished difference. Result has 273 places, 237 transitions, 2278 flow [2024-06-21 18:54:21,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2278, PETRI_PLACES=273, PETRI_TRANSITIONS=237} [2024-06-21 18:54:21,566 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 18:54:21,566 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 237 transitions, 2278 flow [2024-06-21 18:54:21,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:21,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:21,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:54:21,567 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:21,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1296131341, now seen corresponding path program 6 times [2024-06-21 18:54:21,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:21,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680002899] [2024-06-21 18:54:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:23,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:23,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680002899] [2024-06-21 18:54:23,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680002899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:23,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:23,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708245865] [2024-06-21 18:54:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:23,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:23,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:23,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 237 transitions, 2278 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:23,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:23,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:23,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:23,924 INFO L124 PetriNetUnfolderBase]: 494/887 cut-off events. [2024-06-21 18:54:23,925 INFO L125 PetriNetUnfolderBase]: For 87357/87357 co-relation queries the response was YES. [2024-06-21 18:54:23,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 887 events. 494/887 cut-off events. For 87357/87357 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4320 event pairs, 93 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 6207. Up to 842 conditions per place. [2024-06-21 18:54:23,933 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 20 changer transitions 0/249 dead transitions. [2024-06-21 18:54:23,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 249 transitions, 2802 flow [2024-06-21 18:54:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 18:54:23,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 18:54:23,934 INFO L175 Difference]: Start difference. First operand has 273 places, 237 transitions, 2278 flow. Second operand 11 states and 116 transitions. [2024-06-21 18:54:23,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 249 transitions, 2802 flow [2024-06-21 18:54:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 249 transitions, 2714 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 18:54:24,168 INFO L231 Difference]: Finished difference. Result has 274 places, 237 transitions, 2234 flow [2024-06-21 18:54:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2234, PETRI_PLACES=274, PETRI_TRANSITIONS=237} [2024-06-21 18:54:24,169 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 18:54:24,169 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 237 transitions, 2234 flow [2024-06-21 18:54:24,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:24,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:24,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:54:24,169 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:24,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2016928217, now seen corresponding path program 7 times [2024-06-21 18:54:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:24,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931119425] [2024-06-21 18:54:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931119425] [2024-06-21 18:54:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931119425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:26,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:26,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000698917] [2024-06-21 18:54:26,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:26,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:26,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:26,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 237 transitions, 2234 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:26,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:26,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:26,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:26,555 INFO L124 PetriNetUnfolderBase]: 498/895 cut-off events. [2024-06-21 18:54:26,555 INFO L125 PetriNetUnfolderBase]: For 89511/89511 co-relation queries the response was YES. [2024-06-21 18:54:26,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6373 conditions, 895 events. 498/895 cut-off events. For 89511/89511 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4364 event pairs, 97 based on Foata normal form. 2/895 useless extension candidates. Maximal degree in co-relation 6248. Up to 814 conditions per place. [2024-06-21 18:54:26,564 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 212 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-21 18:54:26,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 249 transitions, 2782 flow [2024-06-21 18:54:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 18:54:26,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:54:26,565 INFO L175 Difference]: Start difference. First operand has 274 places, 237 transitions, 2234 flow. Second operand 11 states and 121 transitions. [2024-06-21 18:54:26,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 249 transitions, 2782 flow [2024-06-21 18:54:26,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 249 transitions, 2736 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:54:26,791 INFO L231 Difference]: Finished difference. Result has 275 places, 238 transitions, 2292 flow [2024-06-21 18:54:26,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2292, PETRI_PLACES=275, PETRI_TRANSITIONS=238} [2024-06-21 18:54:26,792 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 18:54:26,792 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 238 transitions, 2292 flow [2024-06-21 18:54:26,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:26,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:26,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:26,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:54:26,792 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:26,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2016928062, now seen corresponding path program 5 times [2024-06-21 18:54:26,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:26,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391602608] [2024-06-21 18:54:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:26,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:28,361 INFO 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 18:54:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391602608] [2024-06-21 18:54:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391602608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:28,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:28,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:28,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793082429] [2024-06-21 18:54:28,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:28,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:28,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 238 transitions, 2292 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:28,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:28,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:28,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:28,849 INFO L124 PetriNetUnfolderBase]: 506/908 cut-off events. [2024-06-21 18:54:28,850 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-06-21 18:54:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6608 conditions, 908 events. 506/908 cut-off events. For 91994/91994 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4436 event pairs, 96 based on Foata normal form. 1/907 useless extension candidates. Maximal degree in co-relation 6482. Up to 781 conditions per place. [2024-06-21 18:54:28,856 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 196 selfloop transitions, 55 changer transitions 0/253 dead transitions. [2024-06-21 18:54:28,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 253 transitions, 3050 flow [2024-06-21 18:54:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 18:54:28,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 18:54:28,858 INFO L175 Difference]: Start difference. First operand has 275 places, 238 transitions, 2292 flow. Second operand 11 states and 128 transitions. [2024-06-21 18:54:28,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 253 transitions, 3050 flow [2024-06-21 18:54:29,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 253 transitions, 2956 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:29,118 INFO L231 Difference]: Finished difference. Result has 277 places, 242 transitions, 2381 flow [2024-06-21 18:54:29,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2381, PETRI_PLACES=277, PETRI_TRANSITIONS=242} [2024-06-21 18:54:29,119 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2024-06-21 18:54:29,119 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 242 transitions, 2381 flow [2024-06-21 18:54:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:29,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:29,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:29,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:54:29,120 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:29,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 763519085, now seen corresponding path program 8 times [2024-06-21 18:54:29,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:29,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85356034] [2024-06-21 18:54:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:29,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:30,679 INFO 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 18:54:30,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:30,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85356034] [2024-06-21 18:54:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85356034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:30,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:30,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940257159] [2024-06-21 18:54:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:30,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:30,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 242 transitions, 2381 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:30,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:30,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:30,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:31,115 INFO L124 PetriNetUnfolderBase]: 510/916 cut-off events. [2024-06-21 18:54:31,116 INFO L125 PetriNetUnfolderBase]: For 97908/97908 co-relation queries the response was YES. [2024-06-21 18:54:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6724 conditions, 916 events. 510/916 cut-off events. For 97908/97908 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4498 event pairs, 97 based on Foata normal form. 2/916 useless extension candidates. Maximal degree in co-relation 6597. Up to 835 conditions per place. [2024-06-21 18:54:31,124 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 216 selfloop transitions, 36 changer transitions 0/254 dead transitions. [2024-06-21 18:54:31,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 254 transitions, 2941 flow [2024-06-21 18:54:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 18:54:31,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 18:54:31,125 INFO L175 Difference]: Start difference. First operand has 277 places, 242 transitions, 2381 flow. Second operand 11 states and 120 transitions. [2024-06-21 18:54:31,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 254 transitions, 2941 flow [2024-06-21 18:54:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 254 transitions, 2842 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 18:54:31,359 INFO L231 Difference]: Finished difference. Result has 281 places, 243 transitions, 2390 flow [2024-06-21 18:54:31,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2390, PETRI_PLACES=281, PETRI_TRANSITIONS=243} [2024-06-21 18:54:31,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 18:54:31,360 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 243 transitions, 2390 flow [2024-06-21 18:54:31,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:31,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:31,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:54:31,361 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:31,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash 763519240, now seen corresponding path program 6 times [2024-06-21 18:54:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194554835] [2024-06-21 18:54:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:32,977 INFO 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 18:54:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194554835] [2024-06-21 18:54:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194554835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154474956] [2024-06-21 18:54:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:33,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:33,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 243 transitions, 2390 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:33,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:33,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:33,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:33,450 INFO L124 PetriNetUnfolderBase]: 523/937 cut-off events. [2024-06-21 18:54:33,451 INFO L125 PetriNetUnfolderBase]: For 103825/103825 co-relation queries the response was YES. [2024-06-21 18:54:33,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7089 conditions, 937 events. 523/937 cut-off events. For 103825/103825 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4630 event pairs, 99 based on Foata normal form. 1/936 useless extension candidates. Maximal degree in co-relation 6960. Up to 798 conditions per place. [2024-06-21 18:54:33,459 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 199 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2024-06-21 18:54:33,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 261 transitions, 3372 flow [2024-06-21 18:54:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 18:54:33,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 18:54:33,460 INFO L175 Difference]: Start difference. First operand has 281 places, 243 transitions, 2390 flow. Second operand 11 states and 129 transitions. [2024-06-21 18:54:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 261 transitions, 3372 flow [2024-06-21 18:54:33,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 261 transitions, 3274 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:33,810 INFO L231 Difference]: Finished difference. Result has 284 places, 249 transitions, 2551 flow [2024-06-21 18:54:33,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2551, PETRI_PLACES=284, PETRI_TRANSITIONS=249} [2024-06-21 18:54:33,810 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 18:54:33,810 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 249 transitions, 2551 flow [2024-06-21 18:54:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:33,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:33,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:54:33,811 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:33,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 763524820, now seen corresponding path program 7 times [2024-06-21 18:54:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332120485] [2024-06-21 18:54:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:35,178 INFO 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 18:54:35,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:35,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332120485] [2024-06-21 18:54:35,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332120485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:35,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:35,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448613681] [2024-06-21 18:54:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:35,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:35,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:35,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 249 transitions, 2551 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:35,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:35,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:35,641 INFO L124 PetriNetUnfolderBase]: 526/942 cut-off events. [2024-06-21 18:54:35,641 INFO L125 PetriNetUnfolderBase]: For 106411/106411 co-relation queries the response was YES. [2024-06-21 18:54:35,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 942 events. 526/942 cut-off events. For 106411/106411 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4684 event pairs, 98 based on Foata normal form. 1/941 useless extension candidates. Maximal degree in co-relation 7146. Up to 822 conditions per place. [2024-06-21 18:54:35,651 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 206 selfloop transitions, 53 changer transitions 0/261 dead transitions. [2024-06-21 18:54:35,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 261 transitions, 3133 flow [2024-06-21 18:54:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 18:54:35,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 18:54:35,654 INFO L175 Difference]: Start difference. First operand has 284 places, 249 transitions, 2551 flow. Second operand 10 states and 118 transitions. [2024-06-21 18:54:35,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 261 transitions, 3133 flow [2024-06-21 18:54:35,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 261 transitions, 3032 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:54:35,972 INFO L231 Difference]: Finished difference. Result has 288 places, 251 transitions, 2605 flow [2024-06-21 18:54:35,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2605, PETRI_PLACES=288, PETRI_TRANSITIONS=251} [2024-06-21 18:54:35,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 18:54:35,973 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 251 transitions, 2605 flow [2024-06-21 18:54:35,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:35,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:35,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:35,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:54:35,974 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:35,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash 758008835, now seen corresponding path program 9 times [2024-06-21 18:54:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:35,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256497821] [2024-06-21 18:54:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:35,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:37,543 INFO 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 18:54:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256497821] [2024-06-21 18:54:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256497821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:37,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242879933] [2024-06-21 18:54:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:37,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:37,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 251 transitions, 2605 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:37,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:37,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:37,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:37,994 INFO L124 PetriNetUnfolderBase]: 537/963 cut-off events. [2024-06-21 18:54:37,994 INFO L125 PetriNetUnfolderBase]: For 120913/120913 co-relation queries the response was YES. [2024-06-21 18:54:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7700 conditions, 963 events. 537/963 cut-off events. For 120913/120913 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4797 event pairs, 96 based on Foata normal form. 2/963 useless extension candidates. Maximal degree in co-relation 7568. Up to 844 conditions per place. [2024-06-21 18:54:38,004 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 221 selfloop transitions, 43 changer transitions 0/266 dead transitions. [2024-06-21 18:54:38,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 266 transitions, 3401 flow [2024-06-21 18:54:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 18:54:38,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 18:54:38,005 INFO L175 Difference]: Start difference. First operand has 288 places, 251 transitions, 2605 flow. Second operand 10 states and 118 transitions. [2024-06-21 18:54:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 266 transitions, 3401 flow [2024-06-21 18:54:38,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 266 transitions, 3280 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:54:38,553 INFO L231 Difference]: Finished difference. Result has 290 places, 253 transitions, 2640 flow [2024-06-21 18:54:38,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2640, PETRI_PLACES=290, PETRI_TRANSITIONS=253} [2024-06-21 18:54:38,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-06-21 18:54:38,553 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 253 transitions, 2640 flow [2024-06-21 18:54:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:38,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:38,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:38,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:54:38,554 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:38,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2017072367, now seen corresponding path program 10 times [2024-06-21 18:54:38,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:38,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504682752] [2024-06-21 18:54:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504682752] [2024-06-21 18:54:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504682752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:40,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142779905] [2024-06-21 18:54:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:40,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:40,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:40,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:40,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 253 transitions, 2640 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:40,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:40,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:40,924 INFO L124 PetriNetUnfolderBase]: 534/958 cut-off events. [2024-06-21 18:54:40,924 INFO L125 PetriNetUnfolderBase]: For 115913/115913 co-relation queries the response was YES. [2024-06-21 18:54:40,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7498 conditions, 958 events. 534/958 cut-off events. For 115913/115913 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4772 event pairs, 97 based on Foata normal form. 2/958 useless extension candidates. Maximal degree in co-relation 7365. Up to 868 conditions per place. [2024-06-21 18:54:40,934 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 222 selfloop transitions, 40 changer transitions 0/264 dead transitions. [2024-06-21 18:54:40,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 264 transitions, 3190 flow [2024-06-21 18:54:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 18:54:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 18:54:40,935 INFO L175 Difference]: Start difference. First operand has 290 places, 253 transitions, 2640 flow. Second operand 11 states and 122 transitions. [2024-06-21 18:54:40,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 264 transitions, 3190 flow [2024-06-21 18:54:41,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 264 transitions, 3084 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 18:54:41,271 INFO L231 Difference]: Finished difference. Result has 295 places, 253 transitions, 2618 flow [2024-06-21 18:54:41,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2618, PETRI_PLACES=295, PETRI_TRANSITIONS=253} [2024-06-21 18:54:41,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-21 18:54:41,271 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 253 transitions, 2618 flow [2024-06-21 18:54:41,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:41,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:41,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:54:41,272 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:41,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2017072212, now seen corresponding path program 8 times [2024-06-21 18:54:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:41,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182429542] [2024-06-21 18:54:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:42,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182429542] [2024-06-21 18:54:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182429542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:42,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:42,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:54:42,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787451065] [2024-06-21 18:54:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:54:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:54:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:54:43,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:43,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 253 transitions, 2618 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:43,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:43,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:43,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:43,362 INFO L124 PetriNetUnfolderBase]: 537/963 cut-off events. [2024-06-21 18:54:43,362 INFO L125 PetriNetUnfolderBase]: For 113729/113729 co-relation queries the response was YES. [2024-06-21 18:54:43,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 963 events. 537/963 cut-off events. For 113729/113729 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4812 event pairs, 98 based on Foata normal form. 1/962 useless extension candidates. Maximal degree in co-relation 7387. Up to 814 conditions per place. [2024-06-21 18:54:43,372 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 66 changer transitions 0/266 dead transitions. [2024-06-21 18:54:43,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 266 transitions, 3390 flow [2024-06-21 18:54:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 18:54:43,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 18:54:43,373 INFO L175 Difference]: Start difference. First operand has 295 places, 253 transitions, 2618 flow. Second operand 11 states and 128 transitions. [2024-06-21 18:54:43,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 266 transitions, 3390 flow [2024-06-21 18:54:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 266 transitions, 3300 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:54:43,765 INFO L231 Difference]: Finished difference. Result has 296 places, 255 transitions, 2709 flow [2024-06-21 18:54:43,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2709, PETRI_PLACES=296, PETRI_TRANSITIONS=255} [2024-06-21 18:54:43,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 18:54:43,766 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 255 transitions, 2709 flow [2024-06-21 18:54:43,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:54:43,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:43,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:43,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:54:43,766 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2011358292, now seen corresponding path program 9 times [2024-06-21 18:54:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:43,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352836837] [2024-06-21 18:54:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:45,163 INFO 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 18:54:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352836837] [2024-06-21 18:54:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352836837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:45,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:45,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445264937] [2024-06-21 18:54:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:45,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:45,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 255 transitions, 2709 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:45,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:45,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:45,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:45,544 INFO L124 PetriNetUnfolderBase]: 535/960 cut-off events. [2024-06-21 18:54:45,544 INFO L125 PetriNetUnfolderBase]: For 112307/112307 co-relation queries the response was YES. [2024-06-21 18:54:45,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7507 conditions, 960 events. 535/960 cut-off events. For 112307/112307 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4792 event pairs, 98 based on Foata normal form. 1/959 useless extension candidates. Maximal degree in co-relation 7371. Up to 840 conditions per place. [2024-06-21 18:54:45,554 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 208 selfloop transitions, 55 changer transitions 0/265 dead transitions. [2024-06-21 18:54:45,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 265 transitions, 3259 flow [2024-06-21 18:54:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 18:54:45,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 18:54:45,555 INFO L175 Difference]: Start difference. First operand has 296 places, 255 transitions, 2709 flow. Second operand 10 states and 117 transitions. [2024-06-21 18:54:45,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 265 transitions, 3259 flow [2024-06-21 18:54:45,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 265 transitions, 3080 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:45,903 INFO L231 Difference]: Finished difference. Result has 297 places, 255 transitions, 2645 flow [2024-06-21 18:54:45,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2645, PETRI_PLACES=297, PETRI_TRANSITIONS=255} [2024-06-21 18:54:45,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-21 18:54:45,904 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 255 transitions, 2645 flow [2024-06-21 18:54:45,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:45,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:45,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:45,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:54:45,904 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:45,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2016922265, now seen corresponding path program 1 times [2024-06-21 18:54:45,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:45,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475557046] [2024-06-21 18:54:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:45,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:47,374 INFO 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 18:54:47,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:47,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475557046] [2024-06-21 18:54:47,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475557046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:47,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:47,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652267236] [2024-06-21 18:54:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:47,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:47,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:47,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:47,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 255 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:47,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:47,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:47,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:47,974 INFO L124 PetriNetUnfolderBase]: 561/1002 cut-off events. [2024-06-21 18:54:47,974 INFO L125 PetriNetUnfolderBase]: For 135413/135413 co-relation queries the response was YES. [2024-06-21 18:54:47,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8114 conditions, 1002 events. 561/1002 cut-off events. For 135413/135413 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5022 event pairs, 103 based on Foata normal form. 2/1002 useless extension candidates. Maximal degree in co-relation 7977. Up to 783 conditions per place. [2024-06-21 18:54:47,984 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 222 selfloop transitions, 53 changer transitions 0/277 dead transitions. [2024-06-21 18:54:47,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 277 transitions, 3709 flow [2024-06-21 18:54:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:54:47,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:54:47,985 INFO L175 Difference]: Start difference. First operand has 297 places, 255 transitions, 2645 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:54:47,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 277 transitions, 3709 flow [2024-06-21 18:54:48,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 277 transitions, 3585 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:48,382 INFO L231 Difference]: Finished difference. Result has 299 places, 261 transitions, 2726 flow [2024-06-21 18:54:48,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2521, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2726, PETRI_PLACES=299, PETRI_TRANSITIONS=261} [2024-06-21 18:54:48,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 18:54:48,382 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 261 transitions, 2726 flow [2024-06-21 18:54:48,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:48,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:48,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:48,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:54:48,383 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:48,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2011559885, now seen corresponding path program 2 times [2024-06-21 18:54:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:48,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754811478] [2024-06-21 18:54:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:49,857 INFO 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 18:54:49,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:49,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754811478] [2024-06-21 18:54:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754811478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:49,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:49,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945365893] [2024-06-21 18:54:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:49,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:49,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:49,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:49,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 261 transitions, 2726 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:49,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:49,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:49,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:50,411 INFO L124 PetriNetUnfolderBase]: 567/1012 cut-off events. [2024-06-21 18:54:50,411 INFO L125 PetriNetUnfolderBase]: For 138800/138800 co-relation queries the response was YES. [2024-06-21 18:54:50,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8253 conditions, 1012 events. 567/1012 cut-off events. For 138800/138800 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5092 event pairs, 100 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 8115. Up to 789 conditions per place. [2024-06-21 18:54:50,421 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 221 selfloop transitions, 56 changer transitions 0/279 dead transitions. [2024-06-21 18:54:50,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 279 transitions, 3742 flow [2024-06-21 18:54:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 18:54:50,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 18:54:50,422 INFO L175 Difference]: Start difference. First operand has 299 places, 261 transitions, 2726 flow. Second operand 11 states and 134 transitions. [2024-06-21 18:54:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 279 transitions, 3742 flow [2024-06-21 18:54:50,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 279 transitions, 3686 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:54:50,834 INFO L231 Difference]: Finished difference. Result has 304 places, 263 transitions, 2821 flow [2024-06-21 18:54:50,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2821, PETRI_PLACES=304, PETRI_TRANSITIONS=263} [2024-06-21 18:54:50,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-21 18:54:50,835 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 263 transitions, 2821 flow [2024-06-21 18:54:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:50,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:50,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:54:50,835 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2016922482, now seen corresponding path program 10 times [2024-06-21 18:54:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:50,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276577971] [2024-06-21 18:54:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:54:52,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:52,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276577971] [2024-06-21 18:54:52,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276577971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:52,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:52,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:52,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749290120] [2024-06-21 18:54:52,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:52,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:52,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:52,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:52,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 263 transitions, 2821 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:52,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:52,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:52,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:52,881 INFO L124 PetriNetUnfolderBase]: 565/1009 cut-off events. [2024-06-21 18:54:52,881 INFO L125 PetriNetUnfolderBase]: For 133247/133247 co-relation queries the response was YES. [2024-06-21 18:54:52,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8258 conditions, 1009 events. 565/1009 cut-off events. For 133247/133247 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5074 event pairs, 102 based on Foata normal form. 1/1008 useless extension candidates. Maximal degree in co-relation 8118. Up to 889 conditions per place. [2024-06-21 18:54:52,891 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 219 selfloop transitions, 52 changer transitions 0/273 dead transitions. [2024-06-21 18:54:52,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 273 transitions, 3387 flow [2024-06-21 18:54:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 18:54:52,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 18:54:52,893 INFO L175 Difference]: Start difference. First operand has 304 places, 263 transitions, 2821 flow. Second operand 10 states and 119 transitions. [2024-06-21 18:54:52,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 273 transitions, 3387 flow [2024-06-21 18:54:53,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 273 transitions, 3239 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:53,282 INFO L231 Difference]: Finished difference. Result has 305 places, 263 transitions, 2782 flow [2024-06-21 18:54:53,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2782, PETRI_PLACES=305, PETRI_TRANSITIONS=263} [2024-06-21 18:54:53,282 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 18:54:53,282 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 263 transitions, 2782 flow [2024-06-21 18:54:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:53,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:53,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:53,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:54:53,283 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:53,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2011350635, now seen corresponding path program 3 times [2024-06-21 18:54:53,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468094600] [2024-06-21 18:54:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:54,894 INFO 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 18:54:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:54,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468094600] [2024-06-21 18:54:54,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468094600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:54,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:54,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206334422] [2024-06-21 18:54:54,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:54,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:54,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:54,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:55,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:55,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 263 transitions, 2782 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:55,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:55,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:55,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:55,355 INFO L124 PetriNetUnfolderBase]: 568/1014 cut-off events. [2024-06-21 18:54:55,355 INFO L125 PetriNetUnfolderBase]: For 135832/135832 co-relation queries the response was YES. [2024-06-21 18:54:55,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8250 conditions, 1014 events. 568/1014 cut-off events. For 135832/135832 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5100 event pairs, 99 based on Foata normal form. 1/1013 useless extension candidates. Maximal degree in co-relation 8109. Up to 868 conditions per place. [2024-06-21 18:54:55,365 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 217 selfloop transitions, 64 changer transitions 0/283 dead transitions. [2024-06-21 18:54:55,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 283 transitions, 3840 flow [2024-06-21 18:54:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:54:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:54:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 18:54:55,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 18:54:55,366 INFO L175 Difference]: Start difference. First operand has 305 places, 263 transitions, 2782 flow. Second operand 10 states and 122 transitions. [2024-06-21 18:54:55,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 283 transitions, 3840 flow [2024-06-21 18:54:55,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 283 transitions, 3729 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:54:55,851 INFO L231 Difference]: Finished difference. Result has 307 places, 271 transitions, 2919 flow [2024-06-21 18:54:55,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2919, PETRI_PLACES=307, PETRI_TRANSITIONS=271} [2024-06-21 18:54:55,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 18:54:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 271 transitions, 2919 flow [2024-06-21 18:54:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:54:55,852 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2011358075, now seen corresponding path program 4 times [2024-06-21 18:54:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:55,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074604854] [2024-06-21 18:54:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:57,315 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 18:54:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:57,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074604854] [2024-06-21 18:54:57,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074604854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:57,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:57,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302207356] [2024-06-21 18:54:57,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:57,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:57,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:57,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:57,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 271 transitions, 2919 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:57,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:57,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:57,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:54:57,963 INFO L124 PetriNetUnfolderBase]: 569/1016 cut-off events. [2024-06-21 18:54:57,963 INFO L125 PetriNetUnfolderBase]: For 138745/138745 co-relation queries the response was YES. [2024-06-21 18:54:57,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8293 conditions, 1016 events. 569/1016 cut-off events. For 138745/138745 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5102 event pairs, 100 based on Foata normal form. 2/1016 useless extension candidates. Maximal degree in co-relation 8150. Up to 791 conditions per place. [2024-06-21 18:54:57,972 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 219 selfloop transitions, 66 changer transitions 0/287 dead transitions. [2024-06-21 18:54:57,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 287 transitions, 3952 flow [2024-06-21 18:54:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:54:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:54:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:54:57,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:54:57,976 INFO L175 Difference]: Start difference. First operand has 307 places, 271 transitions, 2919 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:54:57,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 287 transitions, 3952 flow [2024-06-21 18:54:58,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 287 transitions, 3820 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 18:54:58,465 INFO L231 Difference]: Finished difference. Result has 312 places, 273 transitions, 2965 flow [2024-06-21 18:54:58,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2965, PETRI_PLACES=312, PETRI_TRANSITIONS=273} [2024-06-21 18:54:58,465 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 18:54:58,465 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 273 transitions, 2965 flow [2024-06-21 18:54:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:58,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:54:58,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:54:58,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:54:58,466 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:54:58,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:54:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -226493479, now seen corresponding path program 5 times [2024-06-21 18:54:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:54:58,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846997549] [2024-06-21 18:54:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:54:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:54:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:54:59,823 INFO 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 18:54:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:54:59,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846997549] [2024-06-21 18:54:59,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846997549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:54:59,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:54:59,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:54:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186091521] [2024-06-21 18:54:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:54:59,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:54:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:54:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:54:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:54:59,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:54:59,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 273 transitions, 2965 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:54:59,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:54:59,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:54:59,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:00,335 INFO L124 PetriNetUnfolderBase]: 574/1024 cut-off events. [2024-06-21 18:55:00,335 INFO L125 PetriNetUnfolderBase]: For 141847/141847 co-relation queries the response was YES. [2024-06-21 18:55:00,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8344 conditions, 1024 events. 574/1024 cut-off events. For 141847/141847 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5159 event pairs, 100 based on Foata normal form. 3/1025 useless extension candidates. Maximal degree in co-relation 8199. Up to 974 conditions per place. [2024-06-21 18:55:00,346 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 260 selfloop transitions, 25 changer transitions 0/287 dead transitions. [2024-06-21 18:55:00,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 287 transitions, 3821 flow [2024-06-21 18:55:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 18:55:00,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 18:55:00,347 INFO L175 Difference]: Start difference. First operand has 312 places, 273 transitions, 2965 flow. Second operand 11 states and 116 transitions. [2024-06-21 18:55:00,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 287 transitions, 3821 flow [2024-06-21 18:55:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 287 transitions, 3636 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:00,799 INFO L231 Difference]: Finished difference. Result has 314 places, 277 transitions, 2920 flow [2024-06-21 18:55:00,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2920, PETRI_PLACES=314, PETRI_TRANSITIONS=277} [2024-06-21 18:55:00,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 18:55:00,799 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 277 transitions, 2920 flow [2024-06-21 18:55:00,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:00,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:00,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:55:00,800 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:00,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 693922197, now seen corresponding path program 6 times [2024-06-21 18:55:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107839230] [2024-06-21 18:55:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:02,358 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 18:55:02,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:02,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107839230] [2024-06-21 18:55:02,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107839230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:02,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443098861] [2024-06-21 18:55:02,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:02,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:02,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:02,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:02,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 277 transitions, 2920 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:02,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:02,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:02,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:02,952 INFO L124 PetriNetUnfolderBase]: 590/1050 cut-off events. [2024-06-21 18:55:02,953 INFO L125 PetriNetUnfolderBase]: For 149132/149132 co-relation queries the response was YES. [2024-06-21 18:55:02,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8680 conditions, 1050 events. 590/1050 cut-off events. For 149132/149132 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5311 event pairs, 99 based on Foata normal form. 2/1050 useless extension candidates. Maximal degree in co-relation 8534. Up to 944 conditions per place. [2024-06-21 18:55:02,969 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 247 selfloop transitions, 44 changer transitions 0/293 dead transitions. [2024-06-21 18:55:02,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 293 transitions, 3814 flow [2024-06-21 18:55:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 18:55:02,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 18:55:02,971 INFO L175 Difference]: Start difference. First operand has 314 places, 277 transitions, 2920 flow. Second operand 10 states and 119 transitions. [2024-06-21 18:55:02,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 293 transitions, 3814 flow [2024-06-21 18:55:03,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 293 transitions, 3692 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 18:55:03,470 INFO L231 Difference]: Finished difference. Result has 314 places, 281 transitions, 2971 flow [2024-06-21 18:55:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2971, PETRI_PLACES=314, PETRI_TRANSITIONS=281} [2024-06-21 18:55:03,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 18:55:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 281 transitions, 2971 flow [2024-06-21 18:55:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:03,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:03,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:03,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:55:03,471 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:03,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 693914540, now seen corresponding path program 11 times [2024-06-21 18:55:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:03,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065439421] [2024-06-21 18:55:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:04,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065439421] [2024-06-21 18:55:04,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065439421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:04,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:04,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785060756] [2024-06-21 18:55:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:05,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 281 transitions, 2971 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:05,402 INFO L124 PetriNetUnfolderBase]: 593/1055 cut-off events. [2024-06-21 18:55:05,403 INFO L125 PetriNetUnfolderBase]: For 147384/147384 co-relation queries the response was YES. [2024-06-21 18:55:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 1055 events. 593/1055 cut-off events. For 147384/147384 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5328 event pairs, 101 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 8548. Up to 982 conditions per place. [2024-06-21 18:55:05,414 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 253 selfloop transitions, 37 changer transitions 0/292 dead transitions. [2024-06-21 18:55:05,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 292 transitions, 3615 flow [2024-06-21 18:55:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 18:55:05,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 18:55:05,415 INFO L175 Difference]: Start difference. First operand has 314 places, 281 transitions, 2971 flow. Second operand 11 states and 119 transitions. [2024-06-21 18:55:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 292 transitions, 3615 flow [2024-06-21 18:55:05,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 292 transitions, 3530 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:55:05,921 INFO L231 Difference]: Finished difference. Result has 320 places, 283 transitions, 3013 flow [2024-06-21 18:55:05,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3013, PETRI_PLACES=320, PETRI_TRANSITIONS=283} [2024-06-21 18:55:05,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 18:55:05,922 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 283 transitions, 3013 flow [2024-06-21 18:55:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:05,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:05,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:05,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:55:05,922 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:05,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1724906857, now seen corresponding path program 7 times [2024-06-21 18:55:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:05,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121866027] [2024-06-21 18:55:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121866027] [2024-06-21 18:55:07,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121866027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:07,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:07,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584086919] [2024-06-21 18:55:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:07,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:07,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 283 transitions, 3013 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:07,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:07,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:07,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:07,827 INFO L124 PetriNetUnfolderBase]: 609/1081 cut-off events. [2024-06-21 18:55:07,827 INFO L125 PetriNetUnfolderBase]: For 164940/164940 co-relation queries the response was YES. [2024-06-21 18:55:07,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9146 conditions, 1081 events. 609/1081 cut-off events. For 164940/164940 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5474 event pairs, 100 based on Foata normal form. 2/1081 useless extension candidates. Maximal degree in co-relation 8998. Up to 921 conditions per place. [2024-06-21 18:55:07,836 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 256 selfloop transitions, 45 changer transitions 0/303 dead transitions. [2024-06-21 18:55:07,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 303 transitions, 4351 flow [2024-06-21 18:55:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 18:55:07,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 18:55:07,837 INFO L175 Difference]: Start difference. First operand has 320 places, 283 transitions, 3013 flow. Second operand 11 states and 131 transitions. [2024-06-21 18:55:07,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 303 transitions, 4351 flow [2024-06-21 18:55:08,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 303 transitions, 4240 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:08,339 INFO L231 Difference]: Finished difference. Result has 322 places, 287 transitions, 3073 flow [2024-06-21 18:55:08,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3073, PETRI_PLACES=322, PETRI_TRANSITIONS=287} [2024-06-21 18:55:08,339 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 18:55:08,339 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 287 transitions, 3073 flow [2024-06-21 18:55:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:08,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:08,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:08,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:55:08,340 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:08,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -574583675, now seen corresponding path program 8 times [2024-06-21 18:55:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570139043] [2024-06-21 18:55:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:09,767 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 18:55:09,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:09,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570139043] [2024-06-21 18:55:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570139043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:09,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:09,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492044701] [2024-06-21 18:55:09,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:09,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:09,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 287 transitions, 3073 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:09,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:09,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:09,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:10,389 INFO L124 PetriNetUnfolderBase]: 625/1107 cut-off events. [2024-06-21 18:55:10,390 INFO L125 PetriNetUnfolderBase]: For 179018/179018 co-relation queries the response was YES. [2024-06-21 18:55:10,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9628 conditions, 1107 events. 625/1107 cut-off events. For 179018/179018 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 5620 event pairs, 102 based on Foata normal form. 2/1107 useless extension candidates. Maximal degree in co-relation 9479. Up to 1037 conditions per place. [2024-06-21 18:55:10,402 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 275 selfloop transitions, 28 changer transitions 0/305 dead transitions. [2024-06-21 18:55:10,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 305 transitions, 4225 flow [2024-06-21 18:55:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 18:55:10,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 18:55:10,403 INFO L175 Difference]: Start difference. First operand has 322 places, 287 transitions, 3073 flow. Second operand 11 states and 120 transitions. [2024-06-21 18:55:10,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 305 transitions, 4225 flow [2024-06-21 18:55:10,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 305 transitions, 4101 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 18:55:11,000 INFO L231 Difference]: Finished difference. Result has 325 places, 291 transitions, 3106 flow [2024-06-21 18:55:11,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3106, PETRI_PLACES=325, PETRI_TRANSITIONS=291} [2024-06-21 18:55:11,001 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-21 18:55:11,001 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 291 transitions, 3106 flow [2024-06-21 18:55:11,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:11,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:11,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:11,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:55:11,001 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:11,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1101936366, now seen corresponding path program 12 times [2024-06-21 18:55:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:11,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360505937] [2024-06-21 18:55:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:11,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:12,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360505937] [2024-06-21 18:55:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360505937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:12,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:12,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188876791] [2024-06-21 18:55:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:12,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:12,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:12,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 291 transitions, 3106 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:12,868 INFO L124 PetriNetUnfolderBase]: 628/1112 cut-off events. [2024-06-21 18:55:12,868 INFO L125 PetriNetUnfolderBase]: For 177028/177028 co-relation queries the response was YES. [2024-06-21 18:55:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9641 conditions, 1112 events. 628/1112 cut-off events. For 177028/177028 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5658 event pairs, 105 based on Foata normal form. 1/1111 useless extension candidates. Maximal degree in co-relation 9492. Up to 1081 conditions per place. [2024-06-21 18:55:12,881 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 282 selfloop transitions, 18 changer transitions 0/302 dead transitions. [2024-06-21 18:55:12,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 302 transitions, 3774 flow [2024-06-21 18:55:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 18:55:12,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 18:55:12,882 INFO L175 Difference]: Start difference. First operand has 325 places, 291 transitions, 3106 flow. Second operand 10 states and 106 transitions. [2024-06-21 18:55:12,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 302 transitions, 3774 flow [2024-06-21 18:55:13,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 302 transitions, 3690 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 18:55:13,540 INFO L231 Difference]: Finished difference. Result has 328 places, 293 transitions, 3115 flow [2024-06-21 18:55:13,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3115, PETRI_PLACES=328, PETRI_TRANSITIONS=293} [2024-06-21 18:55:13,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2024-06-21 18:55:13,540 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 293 transitions, 3115 flow [2024-06-21 18:55:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:13,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:13,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:55:13,541 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:13,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash 166562283, now seen corresponding path program 9 times [2024-06-21 18:55:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389833245] [2024-06-21 18:55:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:14,980 INFO 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 18:55:14,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389833245] [2024-06-21 18:55:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389833245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:14,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:14,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046145704] [2024-06-21 18:55:14,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 293 transitions, 3115 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:15,610 INFO L124 PetriNetUnfolderBase]: 624/1106 cut-off events. [2024-06-21 18:55:15,611 INFO L125 PetriNetUnfolderBase]: For 174776/174776 co-relation queries the response was YES. [2024-06-21 18:55:15,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1106 events. 624/1106 cut-off events. For 174776/174776 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5624 event pairs, 102 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 9260. Up to 938 conditions per place. [2024-06-21 18:55:15,627 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 256 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-21 18:55:15,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 308 transitions, 4199 flow [2024-06-21 18:55:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 18:55:15,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 18:55:15,628 INFO L175 Difference]: Start difference. First operand has 328 places, 293 transitions, 3115 flow. Second operand 11 states and 129 transitions. [2024-06-21 18:55:15,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 308 transitions, 4199 flow [2024-06-21 18:55:16,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 308 transitions, 4102 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 18:55:16,170 INFO L231 Difference]: Finished difference. Result has 331 places, 293 transitions, 3123 flow [2024-06-21 18:55:16,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3123, PETRI_PLACES=331, PETRI_TRANSITIONS=293} [2024-06-21 18:55:16,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-21 18:55:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 293 transitions, 3123 flow [2024-06-21 18:55:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:16,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:16,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:55:16,171 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:16,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 166360256, now seen corresponding path program 13 times [2024-06-21 18:55:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:16,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092876303] [2024-06-21 18:55:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:17,631 INFO 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 18:55:17,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:17,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092876303] [2024-06-21 18:55:17,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092876303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:17,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:17,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:17,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224184278] [2024-06-21 18:55:17,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:17,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:17,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 293 transitions, 3123 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:17,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:17,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:17,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:18,184 INFO L124 PetriNetUnfolderBase]: 627/1111 cut-off events. [2024-06-21 18:55:18,184 INFO L125 PetriNetUnfolderBase]: For 173271/173271 co-relation queries the response was YES. [2024-06-21 18:55:18,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9523 conditions, 1111 events. 627/1111 cut-off events. For 173271/173271 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5663 event pairs, 104 based on Foata normal form. 1/1110 useless extension candidates. Maximal degree in co-relation 9371. Up to 1038 conditions per place. [2024-06-21 18:55:18,197 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 266 selfloop transitions, 36 changer transitions 0/304 dead transitions. [2024-06-21 18:55:18,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 304 transitions, 3799 flow [2024-06-21 18:55:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 18:55:18,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 18:55:18,199 INFO L175 Difference]: Start difference. First operand has 331 places, 293 transitions, 3123 flow. Second operand 11 states and 120 transitions. [2024-06-21 18:55:18,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 304 transitions, 3799 flow [2024-06-21 18:55:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 304 transitions, 3704 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:18,881 INFO L231 Difference]: Finished difference. Result has 333 places, 295 transitions, 3161 flow [2024-06-21 18:55:18,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3028, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3161, PETRI_PLACES=333, PETRI_TRANSITIONS=295} [2024-06-21 18:55:18,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2024-06-21 18:55:18,881 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 295 transitions, 3161 flow [2024-06-21 18:55:18,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:18,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:18,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:18,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:55:18,882 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:18,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 688344770, now seen corresponding path program 14 times [2024-06-21 18:55:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204296517] [2024-06-21 18:55:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204296517] [2024-06-21 18:55:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204296517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549325290] [2024-06-21 18:55:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:20,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:20,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 295 transitions, 3161 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:20,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:20,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:20,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:20,878 INFO L124 PetriNetUnfolderBase]: 635/1124 cut-off events. [2024-06-21 18:55:20,879 INFO L125 PetriNetUnfolderBase]: For 182294/182294 co-relation queries the response was YES. [2024-06-21 18:55:20,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9787 conditions, 1124 events. 635/1124 cut-off events. For 182294/182294 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5738 event pairs, 104 based on Foata normal form. 1/1123 useless extension candidates. Maximal degree in co-relation 9634. Up to 1044 conditions per place. [2024-06-21 18:55:20,891 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 265 selfloop transitions, 42 changer transitions 0/309 dead transitions. [2024-06-21 18:55:20,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 309 transitions, 4117 flow [2024-06-21 18:55:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 18:55:20,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:55:20,893 INFO L175 Difference]: Start difference. First operand has 333 places, 295 transitions, 3161 flow. Second operand 11 states and 121 transitions. [2024-06-21 18:55:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 309 transitions, 4117 flow [2024-06-21 18:55:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 309 transitions, 4000 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:21,500 INFO L231 Difference]: Finished difference. Result has 335 places, 299 transitions, 3249 flow [2024-06-21 18:55:21,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3249, PETRI_PLACES=335, PETRI_TRANSITIONS=299} [2024-06-21 18:55:21,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2024-06-21 18:55:21,501 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 299 transitions, 3249 flow [2024-06-21 18:55:21,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:21,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:21,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:21,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:55:21,501 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:21,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash -574576235, now seen corresponding path program 10 times [2024-06-21 18:55:21,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:21,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640890970] [2024-06-21 18:55:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:21,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:23,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:23,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640890970] [2024-06-21 18:55:23,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640890970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:23,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229705069] [2024-06-21 18:55:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:23,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:23,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 299 transitions, 3249 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:23,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:23,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:23,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:23,762 INFO L124 PetriNetUnfolderBase]: 631/1118 cut-off events. [2024-06-21 18:55:23,763 INFO L125 PetriNetUnfolderBase]: For 180241/180241 co-relation queries the response was YES. [2024-06-21 18:55:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9559 conditions, 1118 events. 631/1118 cut-off events. For 180241/180241 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5713 event pairs, 101 based on Foata normal form. 2/1118 useless extension candidates. Maximal degree in co-relation 9405. Up to 1051 conditions per place. [2024-06-21 18:55:23,775 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 283 selfloop transitions, 26 changer transitions 0/311 dead transitions. [2024-06-21 18:55:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 311 transitions, 4119 flow [2024-06-21 18:55:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 18:55:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 18:55:23,776 INFO L175 Difference]: Start difference. First operand has 335 places, 299 transitions, 3249 flow. Second operand 11 states and 120 transitions. [2024-06-21 18:55:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 311 transitions, 4119 flow [2024-06-21 18:55:24,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 311 transitions, 3984 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 18:55:24,371 INFO L231 Difference]: Finished difference. Result has 339 places, 299 transitions, 3171 flow [2024-06-21 18:55:24,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3171, PETRI_PLACES=339, PETRI_TRANSITIONS=299} [2024-06-21 18:55:24,371 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2024-06-21 18:55:24,372 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 299 transitions, 3171 flow [2024-06-21 18:55:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:24,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:55:24,372 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:24,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1092731660, now seen corresponding path program 1 times [2024-06-21 18:55:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6200217] [2024-06-21 18:55:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6200217] [2024-06-21 18:55:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6200217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:25,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423472471] [2024-06-21 18:55:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:26,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:26,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 299 transitions, 3171 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:26,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:26,564 INFO L124 PetriNetUnfolderBase]: 628/1113 cut-off events. [2024-06-21 18:55:26,564 INFO L125 PetriNetUnfolderBase]: For 171924/171924 co-relation queries the response was YES. [2024-06-21 18:55:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9382 conditions, 1113 events. 628/1113 cut-off events. For 171924/171924 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5689 event pairs, 103 based on Foata normal form. 1/1112 useless extension candidates. Maximal degree in co-relation 9226. Up to 1076 conditions per place. [2024-06-21 18:55:26,577 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 285 selfloop transitions, 20 changer transitions 0/307 dead transitions. [2024-06-21 18:55:26,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 307 transitions, 3799 flow [2024-06-21 18:55:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 18:55:26,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 18:55:26,578 INFO L175 Difference]: Start difference. First operand has 339 places, 299 transitions, 3171 flow. Second operand 10 states and 105 transitions. [2024-06-21 18:55:26,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 307 transitions, 3799 flow [2024-06-21 18:55:27,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 307 transitions, 3743 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 18:55:27,148 INFO L231 Difference]: Finished difference. Result has 342 places, 299 transitions, 3164 flow [2024-06-21 18:55:27,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3164, PETRI_PLACES=342, PETRI_TRANSITIONS=299} [2024-06-21 18:55:27,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-21 18:55:27,148 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 299 transitions, 3164 flow [2024-06-21 18:55:27,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:27,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:27,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:27,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:55:27,149 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:27,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 688344615, now seen corresponding path program 11 times [2024-06-21 18:55:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:27,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993689233] [2024-06-21 18:55:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:28,663 INFO 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 18:55:28,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:28,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993689233] [2024-06-21 18:55:28,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993689233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:28,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:28,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836921241] [2024-06-21 18:55:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:28,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:28,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:28,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:28,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 299 transitions, 3164 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:28,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:28,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:28,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:29,225 INFO L124 PetriNetUnfolderBase]: 632/1121 cut-off events. [2024-06-21 18:55:29,226 INFO L125 PetriNetUnfolderBase]: For 181168/181168 co-relation queries the response was YES. [2024-06-21 18:55:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9466 conditions, 1121 events. 632/1121 cut-off events. For 181168/181168 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5746 event pairs, 105 based on Foata normal form. 2/1121 useless extension candidates. Maximal degree in co-relation 9309. Up to 1072 conditions per place. [2024-06-21 18:55:29,238 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 283 selfloop transitions, 25 changer transitions 0/310 dead transitions. [2024-06-21 18:55:29,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 310 transitions, 3836 flow [2024-06-21 18:55:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 18:55:29,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-21 18:55:29,239 INFO L175 Difference]: Start difference. First operand has 342 places, 299 transitions, 3164 flow. Second operand 11 states and 115 transitions. [2024-06-21 18:55:29,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 310 transitions, 3836 flow [2024-06-21 18:55:29,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 310 transitions, 3796 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:29,727 INFO L231 Difference]: Finished difference. Result has 344 places, 300 transitions, 3214 flow [2024-06-21 18:55:29,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3214, PETRI_PLACES=344, PETRI_TRANSITIONS=300} [2024-06-21 18:55:29,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2024-06-21 18:55:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 300 transitions, 3214 flow [2024-06-21 18:55:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:29,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:29,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:55:29,728 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:29,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash 688350567, now seen corresponding path program 11 times [2024-06-21 18:55:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131603845] [2024-06-21 18:55:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:31,307 INFO 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 18:55:31,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:31,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131603845] [2024-06-21 18:55:31,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131603845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:31,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:31,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:31,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028888330] [2024-06-21 18:55:31,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:31,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:31,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:31,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 300 transitions, 3214 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:31,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:31,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:31,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:32,002 INFO L124 PetriNetUnfolderBase]: 628/1115 cut-off events. [2024-06-21 18:55:32,003 INFO L125 PetriNetUnfolderBase]: For 172864/172864 co-relation queries the response was YES. [2024-06-21 18:55:32,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9259 conditions, 1115 events. 628/1115 cut-off events. For 172864/172864 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5725 event pairs, 98 based on Foata normal form. 2/1115 useless extension candidates. Maximal degree in co-relation 9101. Up to 955 conditions per place. [2024-06-21 18:55:32,013 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 255 selfloop transitions, 56 changer transitions 0/313 dead transitions. [2024-06-21 18:55:32,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 313 transitions, 4104 flow [2024-06-21 18:55:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 18:55:32,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 18:55:32,014 INFO L175 Difference]: Start difference. First operand has 344 places, 300 transitions, 3214 flow. Second operand 11 states and 125 transitions. [2024-06-21 18:55:32,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 313 transitions, 4104 flow [2024-06-21 18:55:32,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 313 transitions, 4004 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:32,574 INFO L231 Difference]: Finished difference. Result has 346 places, 300 transitions, 3231 flow [2024-06-21 18:55:32,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3231, PETRI_PLACES=346, PETRI_TRANSITIONS=300} [2024-06-21 18:55:32,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-21 18:55:32,574 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 300 transitions, 3231 flow [2024-06-21 18:55:32,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:32,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:32,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:55:32,575 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:32,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -977774834, now seen corresponding path program 15 times [2024-06-21 18:55:32,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:32,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162087245] [2024-06-21 18:55:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:33,872 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 18:55:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162087245] [2024-06-21 18:55:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162087245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:33,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681172777] [2024-06-21 18:55:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:33,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:33,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 300 transitions, 3231 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:33,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:33,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:34,360 INFO L124 PetriNetUnfolderBase]: 631/1120 cut-off events. [2024-06-21 18:55:34,360 INFO L125 PetriNetUnfolderBase]: For 169982/169982 co-relation queries the response was YES. [2024-06-21 18:55:34,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 1120 events. 631/1120 cut-off events. For 169982/169982 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 5756 event pairs, 102 based on Foata normal form. 1/1119 useless extension candidates. Maximal degree in co-relation 9187. Up to 1074 conditions per place. [2024-06-21 18:55:34,373 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 283 selfloop transitions, 26 changer transitions 0/311 dead transitions. [2024-06-21 18:55:34,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 311 transitions, 3929 flow [2024-06-21 18:55:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 18:55:34,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 18:55:34,374 INFO L175 Difference]: Start difference. First operand has 346 places, 300 transitions, 3231 flow. Second operand 10 states and 109 transitions. [2024-06-21 18:55:34,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 311 transitions, 3929 flow [2024-06-21 18:55:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 311 transitions, 3829 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:55:34,886 INFO L231 Difference]: Finished difference. Result has 346 places, 302 transitions, 3252 flow [2024-06-21 18:55:34,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3252, PETRI_PLACES=346, PETRI_TRANSITIONS=302} [2024-06-21 18:55:34,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-21 18:55:34,887 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 302 transitions, 3252 flow [2024-06-21 18:55:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:34,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:34,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:34,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:55:34,887 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:34,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash 693707150, now seen corresponding path program 16 times [2024-06-21 18:55:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:34,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253068116] [2024-06-21 18:55:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:36,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253068116] [2024-06-21 18:55:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253068116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:36,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:36,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034145907] [2024-06-21 18:55:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:36,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:36,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 302 transitions, 3252 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:36,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:36,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:36,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:36,956 INFO L124 PetriNetUnfolderBase]: 634/1125 cut-off events. [2024-06-21 18:55:36,957 INFO L125 PetriNetUnfolderBase]: For 173352/173352 co-relation queries the response was YES. [2024-06-21 18:55:36,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9404 conditions, 1125 events. 634/1125 cut-off events. For 173352/173352 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5781 event pairs, 102 based on Foata normal form. 1/1124 useless extension candidates. Maximal degree in co-relation 9244. Up to 1043 conditions per place. [2024-06-21 18:55:36,971 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 270 selfloop transitions, 41 changer transitions 0/313 dead transitions. [2024-06-21 18:55:36,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 313 transitions, 3958 flow [2024-06-21 18:55:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 18:55:36,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:55:36,973 INFO L175 Difference]: Start difference. First operand has 346 places, 302 transitions, 3252 flow. Second operand 11 states and 121 transitions. [2024-06-21 18:55:36,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 313 transitions, 3958 flow [2024-06-21 18:55:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 313 transitions, 3853 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 18:55:37,510 INFO L231 Difference]: Finished difference. Result has 349 places, 304 transitions, 3302 flow [2024-06-21 18:55:37,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3302, PETRI_PLACES=349, PETRI_TRANSITIONS=304} [2024-06-21 18:55:37,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-21 18:55:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 304 transitions, 3302 flow [2024-06-21 18:55:37,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:37,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:37,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:55:37,511 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:37,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -831285995, now seen corresponding path program 12 times [2024-06-21 18:55:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:37,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350433697] [2024-06-21 18:55:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:37,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:38,908 INFO 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 18:55:38,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350433697] [2024-06-21 18:55:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350433697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:38,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:38,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286528702] [2024-06-21 18:55:38,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:38,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:38,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:38,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 304 transitions, 3302 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:38,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:38,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:38,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:39,543 INFO L124 PetriNetUnfolderBase]: 640/1135 cut-off events. [2024-06-21 18:55:39,543 INFO L125 PetriNetUnfolderBase]: For 182790/182790 co-relation queries the response was YES. [2024-06-21 18:55:39,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 1135 events. 640/1135 cut-off events. For 182790/182790 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 5838 event pairs, 99 based on Foata normal form. 2/1135 useless extension candidates. Maximal degree in co-relation 9369. Up to 1030 conditions per place. [2024-06-21 18:55:39,553 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 278 selfloop transitions, 39 changer transitions 0/319 dead transitions. [2024-06-21 18:55:39,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 319 transitions, 4256 flow [2024-06-21 18:55:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 18:55:39,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 18:55:39,555 INFO L175 Difference]: Start difference. First operand has 349 places, 304 transitions, 3302 flow. Second operand 11 states and 122 transitions. [2024-06-21 18:55:39,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 319 transitions, 4256 flow [2024-06-21 18:55:40,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 319 transitions, 4117 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:40,080 INFO L231 Difference]: Finished difference. Result has 351 places, 306 transitions, 3292 flow [2024-06-21 18:55:40,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3292, PETRI_PLACES=351, PETRI_TRANSITIONS=306} [2024-06-21 18:55:40,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2024-06-21 18:55:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 306 transitions, 3292 flow [2024-06-21 18:55:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:40,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:40,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:40,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:55:40,082 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:40,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 693706995, now seen corresponding path program 12 times [2024-06-21 18:55:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:40,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108458459] [2024-06-21 18:55:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:40,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:41,636 INFO 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 18:55:41,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:41,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108458459] [2024-06-21 18:55:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108458459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:41,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:41,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381005057] [2024-06-21 18:55:41,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:41,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:41,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 306 transitions, 3292 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:41,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:41,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:41,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:42,186 INFO L124 PetriNetUnfolderBase]: 644/1143 cut-off events. [2024-06-21 18:55:42,186 INFO L125 PetriNetUnfolderBase]: For 186245/186245 co-relation queries the response was YES. [2024-06-21 18:55:42,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 1143 events. 644/1143 cut-off events. For 186245/186245 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 5902 event pairs, 104 based on Foata normal form. 2/1143 useless extension candidates. Maximal degree in co-relation 9439. Up to 1094 conditions per place. [2024-06-21 18:55:42,199 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 291 selfloop transitions, 24 changer transitions 0/317 dead transitions. [2024-06-21 18:55:42,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 317 transitions, 3980 flow [2024-06-21 18:55:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 18:55:42,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 18:55:42,200 INFO L175 Difference]: Start difference. First operand has 351 places, 306 transitions, 3292 flow. Second operand 11 states and 116 transitions. [2024-06-21 18:55:42,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 317 transitions, 3980 flow [2024-06-21 18:55:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 317 transitions, 3831 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 18:55:42,733 INFO L231 Difference]: Finished difference. Result has 352 places, 307 transitions, 3233 flow [2024-06-21 18:55:42,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3233, PETRI_PLACES=352, PETRI_TRANSITIONS=307} [2024-06-21 18:55:42,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2024-06-21 18:55:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 307 transitions, 3233 flow [2024-06-21 18:55:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:42,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:42,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:42,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:55:42,734 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:42,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 688196745, now seen corresponding path program 13 times [2024-06-21 18:55:42,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:42,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595311417] [2024-06-21 18:55:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:42,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:44,199 INFO 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 18:55:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595311417] [2024-06-21 18:55:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595311417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:44,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585428266] [2024-06-21 18:55:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:44,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:44,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 307 transitions, 3233 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:44,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:44,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:44,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:44,730 INFO L124 PetriNetUnfolderBase]: 655/1164 cut-off events. [2024-06-21 18:55:44,730 INFO L125 PetriNetUnfolderBase]: For 202547/202547 co-relation queries the response was YES. [2024-06-21 18:55:44,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9974 conditions, 1164 events. 655/1164 cut-off events. For 202547/202547 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 6058 event pairs, 107 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 9811. Up to 1072 conditions per place. [2024-06-21 18:55:44,744 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 284 selfloop transitions, 35 changer transitions 0/321 dead transitions. [2024-06-21 18:55:44,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 321 transitions, 4199 flow [2024-06-21 18:55:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:55:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:55:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 18:55:44,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 18:55:44,745 INFO L175 Difference]: Start difference. First operand has 352 places, 307 transitions, 3233 flow. Second operand 10 states and 112 transitions. [2024-06-21 18:55:44,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 321 transitions, 4199 flow [2024-06-21 18:55:45,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 321 transitions, 4119 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:45,395 INFO L231 Difference]: Finished difference. Result has 353 places, 309 transitions, 3305 flow [2024-06-21 18:55:45,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3305, PETRI_PLACES=353, PETRI_TRANSITIONS=309} [2024-06-21 18:55:45,395 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-06-21 18:55:45,395 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 309 transitions, 3305 flow [2024-06-21 18:55:45,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:45,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:45,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:45,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:55:45,396 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:45,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash -831291947, now seen corresponding path program 14 times [2024-06-21 18:55:45,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:45,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389979427] [2024-06-21 18:55:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:45,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:55:46,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:46,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389979427] [2024-06-21 18:55:46,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389979427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:46,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:46,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625199123] [2024-06-21 18:55:46,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:47,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:47,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 309 transitions, 3305 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:47,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:47,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:47,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:47,580 INFO L124 PetriNetUnfolderBase]: 659/1172 cut-off events. [2024-06-21 18:55:47,580 INFO L125 PetriNetUnfolderBase]: For 206227/206227 co-relation queries the response was YES. [2024-06-21 18:55:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10072 conditions, 1172 events. 659/1172 cut-off events. For 206227/206227 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6125 event pairs, 109 based on Foata normal form. 2/1172 useless extension candidates. Maximal degree in co-relation 9908. Up to 1138 conditions per place. [2024-06-21 18:55:47,594 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 301 selfloop transitions, 17 changer transitions 0/320 dead transitions. [2024-06-21 18:55:47,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 320 transitions, 4003 flow [2024-06-21 18:55:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 18:55:47,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 18:55:47,595 INFO L175 Difference]: Start difference. First operand has 353 places, 309 transitions, 3305 flow. Second operand 11 states and 112 transitions. [2024-06-21 18:55:47,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 320 transitions, 4003 flow [2024-06-21 18:55:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 320 transitions, 3897 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 18:55:48,229 INFO L231 Difference]: Finished difference. Result has 358 places, 310 transitions, 3279 flow [2024-06-21 18:55:48,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3279, PETRI_PLACES=358, PETRI_TRANSITIONS=310} [2024-06-21 18:55:48,230 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2024-06-21 18:55:48,230 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 310 transitions, 3279 flow [2024-06-21 18:55:48,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:48,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:48,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:55:48,230 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:48,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash -831084185, now seen corresponding path program 13 times [2024-06-21 18:55:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89575365] [2024-06-21 18:55:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:49,606 INFO 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 18:55:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89575365] [2024-06-21 18:55:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89575365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:49,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:49,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:55:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725044862] [2024-06-21 18:55:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:55:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:55:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:55:49,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:49,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 310 transitions, 3279 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:49,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:49,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:49,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:50,249 INFO L124 PetriNetUnfolderBase]: 665/1182 cut-off events. [2024-06-21 18:55:50,249 INFO L125 PetriNetUnfolderBase]: For 208708/208708 co-relation queries the response was YES. [2024-06-21 18:55:50,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10076 conditions, 1182 events. 665/1182 cut-off events. For 208708/208708 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6165 event pairs, 108 based on Foata normal form. 2/1182 useless extension candidates. Maximal degree in co-relation 9910. Up to 1073 conditions per place. [2024-06-21 18:55:50,262 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 287 selfloop transitions, 37 changer transitions 0/326 dead transitions. [2024-06-21 18:55:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 326 transitions, 4263 flow [2024-06-21 18:55:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 18:55:50,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 18:55:50,263 INFO L175 Difference]: Start difference. First operand has 358 places, 310 transitions, 3279 flow. Second operand 11 states and 125 transitions. [2024-06-21 18:55:50,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 326 transitions, 4263 flow [2024-06-21 18:55:50,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 326 transitions, 4209 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:55:50,942 INFO L231 Difference]: Finished difference. Result has 360 places, 312 transitions, 3348 flow [2024-06-21 18:55:50,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3348, PETRI_PLACES=360, PETRI_TRANSITIONS=312} [2024-06-21 18:55:50,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 330 predicate places. [2024-06-21 18:55:50,942 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 312 transitions, 3348 flow [2024-06-21 18:55:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:55:50,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:50,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:50,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:55:50,943 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:50,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash 688200465, now seen corresponding path program 15 times [2024-06-21 18:55:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:50,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723639254] [2024-06-21 18:55:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:50,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:52,496 INFO 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 18:55:52,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:52,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723639254] [2024-06-21 18:55:52,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723639254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:52,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:52,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:52,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035782049] [2024-06-21 18:55:52,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:52,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:52,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:52,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:52,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:52,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 312 transitions, 3348 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:52,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:52,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:52,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:53,072 INFO L124 PetriNetUnfolderBase]: 662/1177 cut-off events. [2024-06-21 18:55:53,072 INFO L125 PetriNetUnfolderBase]: For 198768/198768 co-relation queries the response was YES. [2024-06-21 18:55:53,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9855 conditions, 1177 events. 662/1177 cut-off events. For 198768/198768 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6152 event pairs, 110 based on Foata normal form. 2/1177 useless extension candidates. Maximal degree in co-relation 9688. Up to 1116 conditions per place. [2024-06-21 18:55:53,083 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 288 selfloop transitions, 32 changer transitions 0/322 dead transitions. [2024-06-21 18:55:53,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 322 transitions, 4010 flow [2024-06-21 18:55:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 18:55:53,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 18:55:53,084 INFO L175 Difference]: Start difference. First operand has 360 places, 312 transitions, 3348 flow. Second operand 11 states and 116 transitions. [2024-06-21 18:55:53,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 322 transitions, 4010 flow [2024-06-21 18:55:53,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 322 transitions, 3851 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 18:55:53,713 INFO L231 Difference]: Finished difference. Result has 361 places, 312 transitions, 3257 flow [2024-06-21 18:55:53,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3257, PETRI_PLACES=361, PETRI_TRANSITIONS=312} [2024-06-21 18:55:53,713 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 331 predicate places. [2024-06-21 18:55:53,713 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 312 transitions, 3257 flow [2024-06-21 18:55:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:53,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:55:53,714 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 688200620, now seen corresponding path program 17 times [2024-06-21 18:55:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585138949] [2024-06-21 18:55:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:55,199 INFO 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 18:55:55,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585138949] [2024-06-21 18:55:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585138949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:55,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:55,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199206752] [2024-06-21 18:55:55,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:55,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:55,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:55,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 312 transitions, 3257 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:55,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:55,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:55,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:55,839 INFO L124 PetriNetUnfolderBase]: 680/1206 cut-off events. [2024-06-21 18:55:55,839 INFO L125 PetriNetUnfolderBase]: For 216682/216682 co-relation queries the response was YES. [2024-06-21 18:55:55,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10432 conditions, 1206 events. 680/1206 cut-off events. For 216682/216682 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6294 event pairs, 112 based on Foata normal form. 1/1205 useless extension candidates. Maximal degree in co-relation 10265. Up to 1072 conditions per place. [2024-06-21 18:55:55,853 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 260 selfloop transitions, 66 changer transitions 0/328 dead transitions. [2024-06-21 18:55:55,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 4325 flow [2024-06-21 18:55:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 18:55:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 18:55:55,854 INFO L175 Difference]: Start difference. First operand has 361 places, 312 transitions, 3257 flow. Second operand 11 states and 126 transitions. [2024-06-21 18:55:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 4325 flow [2024-06-21 18:55:56,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 328 transitions, 4247 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:55:56,612 INFO L231 Difference]: Finished difference. Result has 363 places, 317 transitions, 3505 flow [2024-06-21 18:55:56,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3505, PETRI_PLACES=363, PETRI_TRANSITIONS=317} [2024-06-21 18:55:56,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 333 predicate places. [2024-06-21 18:55:56,612 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 317 transitions, 3505 flow [2024-06-21 18:55:56,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:56,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:56,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:56,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:55:56,613 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:56,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 688350350, now seen corresponding path program 18 times [2024-06-21 18:55:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:56,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980406730] [2024-06-21 18:55:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:55:58,060 INFO 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 18:55:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:55:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980406730] [2024-06-21 18:55:58,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980406730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:55:58,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:55:58,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:55:58,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483500500] [2024-06-21 18:55:58,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:55:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:55:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:55:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:55:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:55:58,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:55:58,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 317 transitions, 3505 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:58,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:55:58,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:55:58,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:55:58,640 INFO L124 PetriNetUnfolderBase]: 678/1203 cut-off events. [2024-06-21 18:55:58,640 INFO L125 PetriNetUnfolderBase]: For 213817/213817 co-relation queries the response was YES. [2024-06-21 18:55:58,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10469 conditions, 1203 events. 678/1203 cut-off events. For 213817/213817 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6293 event pairs, 112 based on Foata normal form. 1/1202 useless extension candidates. Maximal degree in co-relation 10300. Up to 1130 conditions per place. [2024-06-21 18:55:58,655 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 285 selfloop transitions, 39 changer transitions 0/326 dead transitions. [2024-06-21 18:55:58,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 326 transitions, 4173 flow [2024-06-21 18:55:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:55:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:55:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 18:55:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 18:55:58,656 INFO L175 Difference]: Start difference. First operand has 363 places, 317 transitions, 3505 flow. Second operand 11 states and 118 transitions. [2024-06-21 18:55:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 326 transitions, 4173 flow [2024-06-21 18:55:59,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 326 transitions, 4032 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 18:55:59,380 INFO L231 Difference]: Finished difference. Result has 369 places, 317 transitions, 3447 flow [2024-06-21 18:55:59,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3447, PETRI_PLACES=369, PETRI_TRANSITIONS=317} [2024-06-21 18:55:59,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2024-06-21 18:55:59,381 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 317 transitions, 3447 flow [2024-06-21 18:55:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:55:59,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:55:59,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:55:59,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:55:59,381 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:55:59,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:55:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash -831291792, now seen corresponding path program 19 times [2024-06-21 18:55:59,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:55:59,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215363004] [2024-06-21 18:55:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:55:59,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:55:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:56:00,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:00,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215363004] [2024-06-21 18:56:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215363004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:00,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124891118] [2024-06-21 18:56:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:00,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:56:00,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 317 transitions, 3447 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:00,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:00,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:56:00,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:01,287 INFO L124 PetriNetUnfolderBase]: 681/1208 cut-off events. [2024-06-21 18:56:01,288 INFO L125 PetriNetUnfolderBase]: For 215897/215897 co-relation queries the response was YES. [2024-06-21 18:56:01,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 1208 events. 681/1208 cut-off events. For 215897/215897 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 6337 event pairs, 112 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 10281. Up to 1149 conditions per place. [2024-06-21 18:56:01,303 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 295 selfloop transitions, 33 changer transitions 0/330 dead transitions. [2024-06-21 18:56:01,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 330 transitions, 4454 flow [2024-06-21 18:56:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 18:56:01,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 18:56:01,304 INFO L175 Difference]: Start difference. First operand has 369 places, 317 transitions, 3447 flow. Second operand 10 states and 111 transitions. [2024-06-21 18:56:01,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 330 transitions, 4454 flow [2024-06-21 18:56:02,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 330 transitions, 4367 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:56:02,086 INFO L231 Difference]: Finished difference. Result has 369 places, 320 transitions, 3524 flow [2024-06-21 18:56:02,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3524, PETRI_PLACES=369, PETRI_TRANSITIONS=320} [2024-06-21 18:56:02,087 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2024-06-21 18:56:02,087 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 320 transitions, 3524 flow [2024-06-21 18:56:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:02,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:56:02,088 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:02,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -831076745, now seen corresponding path program 14 times [2024-06-21 18:56:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142685006] [2024-06-21 18:56:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:03,609 INFO 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 18:56:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142685006] [2024-06-21 18:56:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142685006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:03,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:03,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108014458] [2024-06-21 18:56:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:03,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:56:03,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 320 transitions, 3524 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:03,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:03,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:56:03,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:04,294 INFO L124 PetriNetUnfolderBase]: 677/1202 cut-off events. [2024-06-21 18:56:04,295 INFO L125 PetriNetUnfolderBase]: For 212314/212314 co-relation queries the response was YES. [2024-06-21 18:56:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 1202 events. 677/1202 cut-off events. For 212314/212314 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 6318 event pairs, 109 based on Foata normal form. 2/1202 useless extension candidates. Maximal degree in co-relation 10018. Up to 1096 conditions per place. [2024-06-21 18:56:04,317 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 292 selfloop transitions, 38 changer transitions 0/332 dead transitions. [2024-06-21 18:56:04,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 332 transitions, 4234 flow [2024-06-21 18:56:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 18:56:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 18:56:04,318 INFO L175 Difference]: Start difference. First operand has 369 places, 320 transitions, 3524 flow. Second operand 10 states and 116 transitions. [2024-06-21 18:56:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 332 transitions, 4234 flow [2024-06-21 18:56:05,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 332 transitions, 4132 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 18:56:05,200 INFO L231 Difference]: Finished difference. Result has 373 places, 320 transitions, 3503 flow [2024-06-21 18:56:05,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3503, PETRI_PLACES=373, PETRI_TRANSITIONS=320} [2024-06-21 18:56:05,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 343 predicate places. [2024-06-21 18:56:05,201 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 320 transitions, 3503 flow [2024-06-21 18:56:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:05,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:05,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:56:05,201 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:05,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash -831084402, now seen corresponding path program 20 times [2024-06-21 18:56:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276854538] [2024-06-21 18:56:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:06,454 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 18:56:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276854538] [2024-06-21 18:56:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276854538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471184737] [2024-06-21 18:56:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:06,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:56:06,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 320 transitions, 3503 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:06,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:06,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:56:06,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:06,988 INFO L124 PetriNetUnfolderBase]: 675/1199 cut-off events. [2024-06-21 18:56:06,988 INFO L125 PetriNetUnfolderBase]: For 200813/200813 co-relation queries the response was YES. [2024-06-21 18:56:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10054 conditions, 1199 events. 675/1199 cut-off events. For 200813/200813 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 6281 event pairs, 111 based on Foata normal form. 1/1198 useless extension candidates. Maximal degree in co-relation 9880. Up to 1153 conditions per place. [2024-06-21 18:56:07,002 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 302 selfloop transitions, 25 changer transitions 0/329 dead transitions. [2024-06-21 18:56:07,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 329 transitions, 4177 flow [2024-06-21 18:56:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 18:56:07,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:56:07,004 INFO L175 Difference]: Start difference. First operand has 373 places, 320 transitions, 3503 flow. Second operand 10 states and 110 transitions. [2024-06-21 18:56:07,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 329 transitions, 4177 flow [2024-06-21 18:56:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 329 transitions, 4036 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:07,775 INFO L231 Difference]: Finished difference. Result has 374 places, 320 transitions, 3417 flow [2024-06-21 18:56:07,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3417, PETRI_PLACES=374, PETRI_TRANSITIONS=320} [2024-06-21 18:56:07,776 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2024-06-21 18:56:07,776 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 320 transitions, 3417 flow [2024-06-21 18:56:07,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:56:07,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:07,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:56:07,776 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:07,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1815698687, now seen corresponding path program 16 times [2024-06-21 18:56:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:07,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698214821] [2024-06-21 18:56:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:09,204 INFO 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 18:56:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:09,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698214821] [2024-06-21 18:56:09,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698214821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:09,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:09,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:56:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669152478] [2024-06-21 18:56:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:56:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:56:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:56:09,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 18:56:09,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 320 transitions, 3417 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 18:56:09,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:09,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 18:56:09,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:09,820 INFO L124 PetriNetUnfolderBase]: 640/1174 cut-off events. [2024-06-21 18:56:09,820 INFO L125 PetriNetUnfolderBase]: For 230889/230892 co-relation queries the response was YES. [2024-06-21 18:56:09,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 1174 events. 640/1174 cut-off events. For 230889/230892 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 6384 event pairs, 34 based on Foata normal form. 3/1175 useless extension candidates. Maximal degree in co-relation 9736. Up to 759 conditions per place. [2024-06-21 18:56:09,835 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 215 selfloop transitions, 47 changer transitions 0/340 dead transitions. [2024-06-21 18:56:09,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 340 transitions, 4307 flow [2024-06-21 18:56:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 18:56:09,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 18:56:09,836 INFO L175 Difference]: Start difference. First operand has 374 places, 320 transitions, 3417 flow. Second operand 10 states and 133 transitions. [2024-06-21 18:56:09,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 340 transitions, 4307 flow [2024-06-21 18:56:10,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 340 transitions, 4238 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:10,669 INFO L231 Difference]: Finished difference. Result has 375 places, 322 transitions, 3534 flow [2024-06-21 18:56:10,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3534, PETRI_PLACES=375, PETRI_TRANSITIONS=322} [2024-06-21 18:56:10,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2024-06-21 18:56:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 322 transitions, 3534 flow [2024-06-21 18:56:10,670 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 18:56:10,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:10,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:10,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:56:10,670 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1046581800, now seen corresponding path program 21 times [2024-06-21 18:56:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:10,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386817944] [2024-06-21 18:56:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:12,365 INFO 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 18:56:12,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386817944] [2024-06-21 18:56:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386817944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:12,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:12,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:56:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501864164] [2024-06-21 18:56:12,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:12,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:56:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:56:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:56:12,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:56:12,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 322 transitions, 3534 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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 18:56:12,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:12,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:56:12,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:13,201 INFO L124 PetriNetUnfolderBase]: 694/1234 cut-off events. [2024-06-21 18:56:13,201 INFO L125 PetriNetUnfolderBase]: For 232640/232640 co-relation queries the response was YES. [2024-06-21 18:56:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10824 conditions, 1234 events. 694/1234 cut-off events. For 232640/232640 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 6538 event pairs, 74 based on Foata normal form. 1/1233 useless extension candidates. Maximal degree in co-relation 10649. Up to 1080 conditions per place. [2024-06-21 18:56:13,215 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 284 selfloop transitions, 56 changer transitions 0/342 dead transitions. [2024-06-21 18:56:13,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 342 transitions, 4636 flow [2024-06-21 18:56:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 18:56:13,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 18:56:13,216 INFO L175 Difference]: Start difference. First operand has 375 places, 322 transitions, 3534 flow. Second operand 11 states and 130 transitions. [2024-06-21 18:56:13,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 342 transitions, 4636 flow [2024-06-21 18:56:14,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 342 transitions, 4543 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 18:56:14,007 INFO L231 Difference]: Finished difference. Result has 379 places, 326 transitions, 3703 flow [2024-06-21 18:56:14,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3703, PETRI_PLACES=379, PETRI_TRANSITIONS=326} [2024-06-21 18:56:14,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 349 predicate places. [2024-06-21 18:56:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 326 transitions, 3703 flow [2024-06-21 18:56:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 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 18:56:14,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:14,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:14,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:56:14,008 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1774928351, now seen corresponding path program 17 times [2024-06-21 18:56:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708481680] [2024-06-21 18:56:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:15,583 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 18:56:15,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708481680] [2024-06-21 18:56:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708481680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:15,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:15,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942720198] [2024-06-21 18:56:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:15,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:15,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 326 transitions, 3703 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:15,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:15,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:15,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:16,209 INFO L124 PetriNetUnfolderBase]: 702/1249 cut-off events. [2024-06-21 18:56:16,209 INFO L125 PetriNetUnfolderBase]: For 240210/240210 co-relation queries the response was YES. [2024-06-21 18:56:16,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10961 conditions, 1249 events. 702/1249 cut-off events. For 240210/240210 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6646 event pairs, 42 based on Foata normal form. 2/1249 useless extension candidates. Maximal degree in co-relation 10785. Up to 951 conditions per place. [2024-06-21 18:56:16,221 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 282 selfloop transitions, 64 changer transitions 0/348 dead transitions. [2024-06-21 18:56:16,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 348 transitions, 4734 flow [2024-06-21 18:56:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 18:56:16,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 18:56:16,223 INFO L175 Difference]: Start difference. First operand has 379 places, 326 transitions, 3703 flow. Second operand 11 states and 139 transitions. [2024-06-21 18:56:16,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 348 transitions, 4734 flow [2024-06-21 18:56:17,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 348 transitions, 4612 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:17,103 INFO L231 Difference]: Finished difference. Result has 382 places, 328 transitions, 3764 flow [2024-06-21 18:56:17,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3764, PETRI_PLACES=382, PETRI_TRANSITIONS=328} [2024-06-21 18:56:17,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2024-06-21 18:56:17,104 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 328 transitions, 3764 flow [2024-06-21 18:56:17,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:17,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:17,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 18:56:17,104 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -850329042, now seen corresponding path program 22 times [2024-06-21 18:56:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567047722] [2024-06-21 18:56:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:18,607 INFO 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 18:56:18,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567047722] [2024-06-21 18:56:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567047722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439137187] [2024-06-21 18:56:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:18,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:18,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:18,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 328 transitions, 3764 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:18,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:18,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:18,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:19,166 INFO L124 PetriNetUnfolderBase]: 725/1286 cut-off events. [2024-06-21 18:56:19,166 INFO L125 PetriNetUnfolderBase]: For 263419/263419 co-relation queries the response was YES. [2024-06-21 18:56:19,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 1286 events. 725/1286 cut-off events. For 263419/263419 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 6852 event pairs, 82 based on Foata normal form. 1/1285 useless extension candidates. Maximal degree in co-relation 11721. Up to 1098 conditions per place. [2024-06-21 18:56:19,182 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 282 selfloop transitions, 71 changer transitions 0/355 dead transitions. [2024-06-21 18:56:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 355 transitions, 5195 flow [2024-06-21 18:56:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 18:56:19,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 18:56:19,183 INFO L175 Difference]: Start difference. First operand has 382 places, 328 transitions, 3764 flow. Second operand 11 states and 145 transitions. [2024-06-21 18:56:19,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 355 transitions, 5195 flow [2024-06-21 18:56:20,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 355 transitions, 5044 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:20,122 INFO L231 Difference]: Finished difference. Result has 386 places, 334 transitions, 3995 flow [2024-06-21 18:56:20,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3995, PETRI_PLACES=386, PETRI_TRANSITIONS=334} [2024-06-21 18:56:20,122 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-06-21 18:56:20,122 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 334 transitions, 3995 flow [2024-06-21 18:56:20,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:20,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:20,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:20,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 18:56:20,123 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:20,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash 867865709, now seen corresponding path program 18 times [2024-06-21 18:56:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:20,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212508678] [2024-06-21 18:56:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:20,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:21,648 INFO 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 18:56:21,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212508678] [2024-06-21 18:56:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212508678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:21,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:21,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:21,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801463522] [2024-06-21 18:56:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:21,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:21,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:21,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:21,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 334 transitions, 3995 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:21,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:21,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:21,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:22,255 INFO L124 PetriNetUnfolderBase]: 740/1315 cut-off events. [2024-06-21 18:56:22,255 INFO L125 PetriNetUnfolderBase]: For 286973/286973 co-relation queries the response was YES. [2024-06-21 18:56:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12417 conditions, 1315 events. 740/1315 cut-off events. For 286973/286973 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7053 event pairs, 75 based on Foata normal form. 2/1315 useless extension candidates. Maximal degree in co-relation 12238. Up to 1135 conditions per place. [2024-06-21 18:56:22,271 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 294 selfloop transitions, 60 changer transitions 0/356 dead transitions. [2024-06-21 18:56:22,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 356 transitions, 5059 flow [2024-06-21 18:56:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 18:56:22,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 18:56:22,272 INFO L175 Difference]: Start difference. First operand has 386 places, 334 transitions, 3995 flow. Second operand 11 states and 140 transitions. [2024-06-21 18:56:22,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 356 transitions, 5059 flow [2024-06-21 18:56:23,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 356 transitions, 4923 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 18:56:23,350 INFO L231 Difference]: Finished difference. Result has 390 places, 337 transitions, 4055 flow [2024-06-21 18:56:23,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4055, PETRI_PLACES=390, PETRI_TRANSITIONS=337} [2024-06-21 18:56:23,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 360 predicate places. [2024-06-21 18:56:23,350 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 337 transitions, 4055 flow [2024-06-21 18:56:23,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:23,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:23,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 18:56:23,351 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:23,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -819085451, now seen corresponding path program 19 times [2024-06-21 18:56:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759793290] [2024-06-21 18:56:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:24,894 INFO 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 18:56:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759793290] [2024-06-21 18:56:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759793290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:24,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805951888] [2024-06-21 18:56:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:24,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:24,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:25,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:25,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 337 transitions, 4055 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:25,470 INFO L124 PetriNetUnfolderBase]: 737/1310 cut-off events. [2024-06-21 18:56:25,470 INFO L125 PetriNetUnfolderBase]: For 271232/271232 co-relation queries the response was YES. [2024-06-21 18:56:25,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 1310 events. 737/1310 cut-off events. For 271232/271232 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7019 event pairs, 86 based on Foata normal form. 2/1310 useless extension candidates. Maximal degree in co-relation 11971. Up to 1175 conditions per place. [2024-06-21 18:56:25,487 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 295 selfloop transitions, 57 changer transitions 0/354 dead transitions. [2024-06-21 18:56:25,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 354 transitions, 4801 flow [2024-06-21 18:56:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 18:56:25,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 18:56:25,488 INFO L175 Difference]: Start difference. First operand has 390 places, 337 transitions, 4055 flow. Second operand 11 states and 137 transitions. [2024-06-21 18:56:25,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 354 transitions, 4801 flow [2024-06-21 18:56:26,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 354 transitions, 4680 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:26,495 INFO L231 Difference]: Finished difference. Result has 393 places, 337 transitions, 4056 flow [2024-06-21 18:56:26,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4056, PETRI_PLACES=393, PETRI_TRANSITIONS=337} [2024-06-21 18:56:26,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2024-06-21 18:56:26,496 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 337 transitions, 4056 flow [2024-06-21 18:56:26,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:26,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:26,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:26,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 18:56:26,497 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:26,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash -734889072, now seen corresponding path program 23 times [2024-06-21 18:56:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:26,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103572711] [2024-06-21 18:56:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:28,067 INFO 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 18:56:28,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103572711] [2024-06-21 18:56:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103572711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:28,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:28,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:28,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226194601] [2024-06-21 18:56:28,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:28,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:28,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 337 transitions, 4056 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:28,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:28,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:28,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:28,796 INFO L124 PetriNetUnfolderBase]: 732/1303 cut-off events. [2024-06-21 18:56:28,796 INFO L125 PetriNetUnfolderBase]: For 263284/263284 co-relation queries the response was YES. [2024-06-21 18:56:28,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11622 conditions, 1303 events. 732/1303 cut-off events. For 263284/263284 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7005 event pairs, 99 based on Foata normal form. 5/1306 useless extension candidates. Maximal degree in co-relation 11441. Up to 1202 conditions per place. [2024-06-21 18:56:28,813 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 310 selfloop transitions, 43 changer transitions 0/355 dead transitions. [2024-06-21 18:56:28,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 355 transitions, 4879 flow [2024-06-21 18:56:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 18:56:28,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 18:56:28,814 INFO L175 Difference]: Start difference. First operand has 393 places, 337 transitions, 4056 flow. Second operand 10 states and 126 transitions. [2024-06-21 18:56:28,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 355 transitions, 4879 flow [2024-06-21 18:56:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 355 transitions, 4745 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 18:56:29,665 INFO L231 Difference]: Finished difference. Result has 393 places, 339 transitions, 4099 flow [2024-06-21 18:56:29,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4099, PETRI_PLACES=393, PETRI_TRANSITIONS=339} [2024-06-21 18:56:29,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2024-06-21 18:56:29,665 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 339 transitions, 4099 flow [2024-06-21 18:56:29,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:29,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:29,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:29,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 18:56:29,665 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:29,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash -735067787, now seen corresponding path program 20 times [2024-06-21 18:56:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674508450] [2024-06-21 18:56:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:31,234 INFO 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 18:56:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674508450] [2024-06-21 18:56:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674508450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:31,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075918599] [2024-06-21 18:56:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:31,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:31,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 339 transitions, 4099 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:31,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:31,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:31,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:31,908 INFO L124 PetriNetUnfolderBase]: 736/1311 cut-off events. [2024-06-21 18:56:31,908 INFO L125 PetriNetUnfolderBase]: For 244709/244709 co-relation queries the response was YES. [2024-06-21 18:56:31,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11701 conditions, 1311 events. 736/1311 cut-off events. For 244709/244709 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7057 event pairs, 103 based on Foata normal form. 2/1311 useless extension candidates. Maximal degree in co-relation 11519. Up to 1233 conditions per place. [2024-06-21 18:56:31,924 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 317 selfloop transitions, 35 changer transitions 0/354 dead transitions. [2024-06-21 18:56:31,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 354 transitions, 4868 flow [2024-06-21 18:56:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 18:56:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 18:56:31,928 INFO L175 Difference]: Start difference. First operand has 393 places, 339 transitions, 4099 flow. Second operand 10 states and 121 transitions. [2024-06-21 18:56:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 354 transitions, 4868 flow [2024-06-21 18:56:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 354 transitions, 4701 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:32,827 INFO L231 Difference]: Finished difference. Result has 394 places, 340 transitions, 4041 flow [2024-06-21 18:56:32,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4041, PETRI_PLACES=394, PETRI_TRANSITIONS=340} [2024-06-21 18:56:32,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 364 predicate places. [2024-06-21 18:56:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 340 transitions, 4041 flow [2024-06-21 18:56:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:32,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:32,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 18:56:32,828 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:32,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash -735037872, now seen corresponding path program 24 times [2024-06-21 18:56:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59322001] [2024-06-21 18:56:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:34,185 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 18:56:34,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59322001] [2024-06-21 18:56:34,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59322001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:34,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:34,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:34,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400199853] [2024-06-21 18:56:34,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:34,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:34,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:34,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:34,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 340 transitions, 4041 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 18:56:34,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:34,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:34,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:34,792 INFO L124 PetriNetUnfolderBase]: 739/1316 cut-off events. [2024-06-21 18:56:34,792 INFO L125 PetriNetUnfolderBase]: For 236545/236545 co-relation queries the response was YES. [2024-06-21 18:56:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11665 conditions, 1316 events. 739/1316 cut-off events. For 236545/236545 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7103 event pairs, 103 based on Foata normal form. 1/1315 useless extension candidates. Maximal degree in co-relation 11483. Up to 1227 conditions per place. [2024-06-21 18:56:34,808 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 309 selfloop transitions, 44 changer transitions 0/355 dead transitions. [2024-06-21 18:56:34,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 355 transitions, 4843 flow [2024-06-21 18:56:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:56:34,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:56:34,809 INFO L175 Difference]: Start difference. First operand has 394 places, 340 transitions, 4041 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:56:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 355 transitions, 4843 flow [2024-06-21 18:56:35,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 355 transitions, 4749 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:35,733 INFO L231 Difference]: Finished difference. Result has 395 places, 342 transitions, 4111 flow [2024-06-21 18:56:35,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4111, PETRI_PLACES=395, PETRI_TRANSITIONS=342} [2024-06-21 18:56:35,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2024-06-21 18:56:35,733 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 342 transitions, 4111 flow [2024-06-21 18:56:35,733 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 18:56:35,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:35,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:35,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 18:56:35,733 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:35,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -740433887, now seen corresponding path program 21 times [2024-06-21 18:56:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:35,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053581554] [2024-06-21 18:56:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:35,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:37,133 INFO 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 18:56:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:37,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053581554] [2024-06-21 18:56:37,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053581554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:37,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:37,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:37,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160760903] [2024-06-21 18:56:37,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:37,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:37,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 342 transitions, 4111 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 18:56:37,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:37,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:37,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:37,733 INFO L124 PetriNetUnfolderBase]: 743/1324 cut-off events. [2024-06-21 18:56:37,733 INFO L125 PetriNetUnfolderBase]: For 244464/244464 co-relation queries the response was YES. [2024-06-21 18:56:37,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11721 conditions, 1324 events. 743/1324 cut-off events. For 244464/244464 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7159 event pairs, 94 based on Foata normal form. 2/1324 useless extension candidates. Maximal degree in co-relation 11539. Up to 1189 conditions per place. [2024-06-21 18:56:37,750 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 313 selfloop transitions, 44 changer transitions 0/359 dead transitions. [2024-06-21 18:56:37,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 359 transitions, 5144 flow [2024-06-21 18:56:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:56:37,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:56:37,751 INFO L175 Difference]: Start difference. First operand has 395 places, 342 transitions, 4111 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:56:37,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 359 transitions, 5144 flow [2024-06-21 18:56:38,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 359 transitions, 5023 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:38,700 INFO L231 Difference]: Finished difference. Result has 397 places, 343 transitions, 4119 flow [2024-06-21 18:56:38,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4119, PETRI_PLACES=397, PETRI_TRANSITIONS=343} [2024-06-21 18:56:38,700 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 18:56:38,700 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 343 transitions, 4119 flow [2024-06-21 18:56:38,700 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 18:56:38,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:38,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:38,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 18:56:38,701 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:38,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -739506522, now seen corresponding path program 25 times [2024-06-21 18:56:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312365619] [2024-06-21 18:56:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:40,239 INFO 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 18:56:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312365619] [2024-06-21 18:56:40,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312365619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:40,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:40,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:40,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122938887] [2024-06-21 18:56:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:40,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:40,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:40,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 343 transitions, 4119 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:40,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:40,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:40,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:40,911 INFO L124 PetriNetUnfolderBase]: 741/1321 cut-off events. [2024-06-21 18:56:40,911 INFO L125 PetriNetUnfolderBase]: For 228913/228913 co-relation queries the response was YES. [2024-06-21 18:56:40,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 1321 events. 741/1321 cut-off events. For 228913/228913 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7176 event pairs, 100 based on Foata normal form. 1/1320 useless extension candidates. Maximal degree in co-relation 11368. Up to 1186 conditions per place. [2024-06-21 18:56:40,925 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 302 selfloop transitions, 55 changer transitions 0/359 dead transitions. [2024-06-21 18:56:40,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 359 transitions, 4890 flow [2024-06-21 18:56:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 18:56:40,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 18:56:40,926 INFO L175 Difference]: Start difference. First operand has 397 places, 343 transitions, 4119 flow. Second operand 10 states and 129 transitions. [2024-06-21 18:56:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 359 transitions, 4890 flow [2024-06-21 18:56:41,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 359 transitions, 4687 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-21 18:56:41,827 INFO L231 Difference]: Finished difference. Result has 397 places, 343 transitions, 4034 flow [2024-06-21 18:56:41,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4034, PETRI_PLACES=397, PETRI_TRANSITIONS=343} [2024-06-21 18:56:41,827 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 18:56:41,827 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 343 transitions, 4034 flow [2024-06-21 18:56:41,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:41,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:41,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:41,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 18:56:41,828 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:41,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -739511327, now seen corresponding path program 22 times [2024-06-21 18:56:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667280787] [2024-06-21 18:56:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:43,249 INFO 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 18:56:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667280787] [2024-06-21 18:56:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667280787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:43,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529783007] [2024-06-21 18:56:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:43,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:43,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 343 transitions, 4034 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 18:56:43,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:43,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:43,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:43,841 INFO L124 PetriNetUnfolderBase]: 738/1316 cut-off events. [2024-06-21 18:56:43,841 INFO L125 PetriNetUnfolderBase]: For 220225/220225 co-relation queries the response was YES. [2024-06-21 18:56:43,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 1316 events. 738/1316 cut-off events. For 220225/220225 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7156 event pairs, 101 based on Foata normal form. 2/1316 useless extension candidates. Maximal degree in co-relation 10908. Up to 1224 conditions per place. [2024-06-21 18:56:43,861 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 315 selfloop transitions, 40 changer transitions 0/357 dead transitions. [2024-06-21 18:56:43,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 357 transitions, 4778 flow [2024-06-21 18:56:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 18:56:43,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 18:56:43,862 INFO L175 Difference]: Start difference. First operand has 397 places, 343 transitions, 4034 flow. Second operand 10 states and 123 transitions. [2024-06-21 18:56:43,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 357 transitions, 4778 flow [2024-06-21 18:56:44,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 357 transitions, 4595 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 18:56:44,597 INFO L231 Difference]: Finished difference. Result has 397 places, 343 transitions, 3937 flow [2024-06-21 18:56:44,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3937, PETRI_PLACES=397, PETRI_TRANSITIONS=343} [2024-06-21 18:56:44,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 18:56:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 343 transitions, 3937 flow [2024-06-21 18:56:44,597 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 18:56:44,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:44,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 18:56:44,598 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1467069468, now seen corresponding path program 26 times [2024-06-21 18:56:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802623208] [2024-06-21 18:56:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:46,298 INFO 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 18:56:46,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:46,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802623208] [2024-06-21 18:56:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802623208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:46,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:46,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:46,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366773640] [2024-06-21 18:56:46,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:46,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:46,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:46,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:46,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:46,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:46,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 343 transitions, 3937 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:46,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:46,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:46,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:47,092 INFO L124 PetriNetUnfolderBase]: 753/1341 cut-off events. [2024-06-21 18:56:47,092 INFO L125 PetriNetUnfolderBase]: For 244102/244102 co-relation queries the response was YES. [2024-06-21 18:56:47,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11272 conditions, 1341 events. 753/1341 cut-off events. For 244102/244102 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 7301 event pairs, 85 based on Foata normal form. 5/1344 useless extension candidates. Maximal degree in co-relation 11091. Up to 965 conditions per place. [2024-06-21 18:56:47,105 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 247 selfloop transitions, 121 changer transitions 0/370 dead transitions. [2024-06-21 18:56:47,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 370 transitions, 5187 flow [2024-06-21 18:56:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:56:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:56:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-06-21 18:56:47,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44868035190615835 [2024-06-21 18:56:47,107 INFO L175 Difference]: Start difference. First operand has 397 places, 343 transitions, 3937 flow. Second operand 11 states and 153 transitions. [2024-06-21 18:56:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 370 transitions, 5187 flow [2024-06-21 18:56:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 370 transitions, 5091 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:56:47,862 INFO L231 Difference]: Finished difference. Result has 399 places, 350 transitions, 4296 flow [2024-06-21 18:56:47,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3843, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4296, PETRI_PLACES=399, PETRI_TRANSITIONS=350} [2024-06-21 18:56:47,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2024-06-21 18:56:47,862 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 350 transitions, 4296 flow [2024-06-21 18:56:47,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:47,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:47,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:47,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 18:56:47,863 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:47,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1467069623, now seen corresponding path program 23 times [2024-06-21 18:56:47,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:47,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332585138] [2024-06-21 18:56:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:47,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:49,440 INFO 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 18:56:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332585138] [2024-06-21 18:56:49,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332585138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:49,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:49,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:49,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699602230] [2024-06-21 18:56:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:49,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:49,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:49,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 350 transitions, 4296 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:49,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:49,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:50,046 INFO L124 PetriNetUnfolderBase]: 757/1349 cut-off events. [2024-06-21 18:56:50,046 INFO L125 PetriNetUnfolderBase]: For 225937/225937 co-relation queries the response was YES. [2024-06-21 18:56:50,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 1349 events. 757/1349 cut-off events. For 225937/225937 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 7367 event pairs, 85 based on Foata normal form. 2/1349 useless extension candidates. Maximal degree in co-relation 11457. Up to 1216 conditions per place. [2024-06-21 18:56:50,064 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 303 selfloop transitions, 58 changer transitions 0/363 dead transitions. [2024-06-21 18:56:50,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 363 transitions, 5086 flow [2024-06-21 18:56:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 18:56:50,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 18:56:50,065 INFO L175 Difference]: Start difference. First operand has 399 places, 350 transitions, 4296 flow. Second operand 10 states and 126 transitions. [2024-06-21 18:56:50,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 363 transitions, 5086 flow [2024-06-21 18:56:50,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 363 transitions, 4825 flow, removed 63 selfloop flow, removed 12 redundant places. [2024-06-21 18:56:50,947 INFO L231 Difference]: Finished difference. Result has 397 places, 351 transitions, 4199 flow [2024-06-21 18:56:50,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4199, PETRI_PLACES=397, PETRI_TRANSITIONS=351} [2024-06-21 18:56:50,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 18:56:50,948 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 351 transitions, 4199 flow [2024-06-21 18:56:50,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:50,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:50,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 18:56:50,948 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:50,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1467213773, now seen corresponding path program 24 times [2024-06-21 18:56:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541644968] [2024-06-21 18:56:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:52,448 INFO 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 18:56:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541644968] [2024-06-21 18:56:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541644968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:56:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770937456] [2024-06-21 18:56:52,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:52,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:56:52,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:56:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:56:52,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:52,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 351 transitions, 4199 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 18:56:52,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:52,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:52,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:52,970 INFO L124 PetriNetUnfolderBase]: 761/1357 cut-off events. [2024-06-21 18:56:52,970 INFO L125 PetriNetUnfolderBase]: For 211084/211084 co-relation queries the response was YES. [2024-06-21 18:56:52,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11453 conditions, 1357 events. 761/1357 cut-off events. For 211084/211084 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7408 event pairs, 85 based on Foata normal form. 2/1357 useless extension candidates. Maximal degree in co-relation 11275. Up to 1206 conditions per place. [2024-06-21 18:56:52,988 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 295 selfloop transitions, 67 changer transitions 0/364 dead transitions. [2024-06-21 18:56:52,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 364 transitions, 4993 flow [2024-06-21 18:56:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:56:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:56:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 18:56:52,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 18:56:52,989 INFO L175 Difference]: Start difference. First operand has 397 places, 351 transitions, 4199 flow. Second operand 9 states and 120 transitions. [2024-06-21 18:56:52,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 364 transitions, 4993 flow [2024-06-21 18:56:53,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 364 transitions, 4841 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:56:53,799 INFO L231 Difference]: Finished difference. Result has 398 places, 352 transitions, 4231 flow [2024-06-21 18:56:53,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4231, PETRI_PLACES=398, PETRI_TRANSITIONS=352} [2024-06-21 18:56:53,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2024-06-21 18:56:53,799 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 352 transitions, 4231 flow [2024-06-21 18:56:53,799 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 18:56:53,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:53,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:53,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:56:53,800 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:53,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1467213618, now seen corresponding path program 27 times [2024-06-21 18:56:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165611465] [2024-06-21 18:56:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:55,240 INFO 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 18:56:55,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:55,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165611465] [2024-06-21 18:56:55,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165611465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:55,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:55,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:55,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151834922] [2024-06-21 18:56:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:55,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:55,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:55,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:55,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 352 transitions, 4231 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:55,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:55,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:55,759 INFO L124 PetriNetUnfolderBase]: 764/1362 cut-off events. [2024-06-21 18:56:55,759 INFO L125 PetriNetUnfolderBase]: For 203317/203317 co-relation queries the response was YES. [2024-06-21 18:56:55,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 1362 events. 764/1362 cut-off events. For 203317/203317 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 7453 event pairs, 88 based on Foata normal form. 1/1361 useless extension candidates. Maximal degree in co-relation 11315. Up to 1126 conditions per place. [2024-06-21 18:56:55,775 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 263 selfloop transitions, 104 changer transitions 0/369 dead transitions. [2024-06-21 18:56:55,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 369 transitions, 5390 flow [2024-06-21 18:56:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 18:56:55,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 18:56:55,776 INFO L175 Difference]: Start difference. First operand has 398 places, 352 transitions, 4231 flow. Second operand 10 states and 133 transitions. [2024-06-21 18:56:55,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 369 transitions, 5390 flow [2024-06-21 18:56:56,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 369 transitions, 5214 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 18:56:56,551 INFO L231 Difference]: Finished difference. Result has 400 places, 357 transitions, 4468 flow [2024-06-21 18:56:56,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4468, PETRI_PLACES=400, PETRI_TRANSITIONS=357} [2024-06-21 18:56:56,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2024-06-21 18:56:56,552 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 357 transitions, 4468 flow [2024-06-21 18:56:56,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:56,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:56,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:56:56,553 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:56,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1467217493, now seen corresponding path program 25 times [2024-06-21 18:56:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:56,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504379099] [2024-06-21 18:56:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:56:58,087 INFO 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 18:56:58,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:56:58,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504379099] [2024-06-21 18:56:58,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504379099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:56:58,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:56:58,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:56:58,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689717062] [2024-06-21 18:56:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:56:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:56:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:56:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:56:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:56:58,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:56:58,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 357 transitions, 4468 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:56:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:56:58,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:56:58,707 INFO L124 PetriNetUnfolderBase]: 768/1370 cut-off events. [2024-06-21 18:56:58,707 INFO L125 PetriNetUnfolderBase]: For 211277/211277 co-relation queries the response was YES. [2024-06-21 18:56:58,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11656 conditions, 1370 events. 768/1370 cut-off events. For 211277/211277 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 7521 event pairs, 83 based on Foata normal form. 2/1370 useless extension candidates. Maximal degree in co-relation 11477. Up to 1164 conditions per place. [2024-06-21 18:56:58,725 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 296 selfloop transitions, 74 changer transitions 0/372 dead transitions. [2024-06-21 18:56:58,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 372 transitions, 5524 flow [2024-06-21 18:56:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:56:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:56:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 18:56:58,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 18:56:58,727 INFO L175 Difference]: Start difference. First operand has 400 places, 357 transitions, 4468 flow. Second operand 10 states and 129 transitions. [2024-06-21 18:56:58,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 372 transitions, 5524 flow [2024-06-21 18:56:59,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 372 transitions, 5345 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 18:56:59,537 INFO L231 Difference]: Finished difference. Result has 404 places, 358 transitions, 4485 flow [2024-06-21 18:56:59,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4485, PETRI_PLACES=404, PETRI_TRANSITIONS=358} [2024-06-21 18:56:59,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 374 predicate places. [2024-06-21 18:56:59,537 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 358 transitions, 4485 flow [2024-06-21 18:56:59,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:56:59,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:56:59,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:56:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:56:59,538 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:56:59,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:56:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1461492041, now seen corresponding path program 15 times [2024-06-21 18:56:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:56:59,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252590701] [2024-06-21 18:56:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:56:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:56:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:01,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252590701] [2024-06-21 18:57:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252590701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:01,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:01,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955754941] [2024-06-21 18:57:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:01,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:01,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 358 transitions, 4485 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:01,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:01,988 INFO L124 PetriNetUnfolderBase]: 774/1381 cut-off events. [2024-06-21 18:57:01,988 INFO L125 PetriNetUnfolderBase]: For 214075/214075 co-relation queries the response was YES. [2024-06-21 18:57:02,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 1381 events. 774/1381 cut-off events. For 214075/214075 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7602 event pairs, 87 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 11643. Up to 1029 conditions per place. [2024-06-21 18:57:02,013 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 261 selfloop transitions, 115 changer transitions 0/378 dead transitions. [2024-06-21 18:57:02,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 378 transitions, 5831 flow [2024-06-21 18:57:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 18:57:02,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 18:57:02,015 INFO L175 Difference]: Start difference. First operand has 404 places, 358 transitions, 4485 flow. Second operand 11 states and 137 transitions. [2024-06-21 18:57:02,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 378 transitions, 5831 flow [2024-06-21 18:57:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 378 transitions, 5596 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:02,811 INFO L231 Difference]: Finished difference. Result has 405 places, 360 transitions, 4529 flow [2024-06-21 18:57:02,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4529, PETRI_PLACES=405, PETRI_TRANSITIONS=360} [2024-06-21 18:57:02,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2024-06-21 18:57:02,812 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 360 transitions, 4529 flow [2024-06-21 18:57:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:02,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:02,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:57:02,813 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:02,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1867349243, now seen corresponding path program 26 times [2024-06-21 18:57:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925898845] [2024-06-21 18:57:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:04,373 INFO 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 18:57:04,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925898845] [2024-06-21 18:57:04,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925898845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:04,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:04,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:04,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344498214] [2024-06-21 18:57:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:04,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:04,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:57:04,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 360 transitions, 4529 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:04,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:04,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:57:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:05,012 INFO L124 PetriNetUnfolderBase]: 771/1375 cut-off events. [2024-06-21 18:57:05,013 INFO L125 PetriNetUnfolderBase]: For 198607/198607 co-relation queries the response was YES. [2024-06-21 18:57:05,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11409 conditions, 1375 events. 771/1375 cut-off events. For 198607/198607 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 7540 event pairs, 86 based on Foata normal form. 2/1375 useless extension candidates. Maximal degree in co-relation 11230. Up to 1242 conditions per place. [2024-06-21 18:57:05,031 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 309 selfloop transitions, 61 changer transitions 0/372 dead transitions. [2024-06-21 18:57:05,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 372 transitions, 5297 flow [2024-06-21 18:57:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:57:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:57:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 18:57:05,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 18:57:05,031 INFO L175 Difference]: Start difference. First operand has 405 places, 360 transitions, 4529 flow. Second operand 10 states and 125 transitions. [2024-06-21 18:57:05,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 372 transitions, 5297 flow [2024-06-21 18:57:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 372 transitions, 4931 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-06-21 18:57:05,754 INFO L231 Difference]: Finished difference. Result has 404 places, 360 transitions, 4291 flow [2024-06-21 18:57:05,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4291, PETRI_PLACES=404, PETRI_TRANSITIONS=360} [2024-06-21 18:57:05,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 374 predicate places. [2024-06-21 18:57:05,754 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 360 transitions, 4291 flow [2024-06-21 18:57:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:05,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:05,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:57:05,755 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1461701508, now seen corresponding path program 28 times [2024-06-21 18:57:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:05,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416203374] [2024-06-21 18:57:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:07,076 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 18:57:07,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:07,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416203374] [2024-06-21 18:57:07,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416203374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:07,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:07,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:07,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467405576] [2024-06-21 18:57:07,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:07,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:07,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:57:07,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 360 transitions, 4291 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 18:57:07,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:07,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:57:07,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:07,674 INFO L124 PetriNetUnfolderBase]: 774/1380 cut-off events. [2024-06-21 18:57:07,674 INFO L125 PetriNetUnfolderBase]: For 192623/192623 co-relation queries the response was YES. [2024-06-21 18:57:07,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11062 conditions, 1380 events. 774/1380 cut-off events. For 192623/192623 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 7581 event pairs, 87 based on Foata normal form. 1/1379 useless extension candidates. Maximal degree in co-relation 10885. Up to 1196 conditions per place. [2024-06-21 18:57:07,692 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 287 selfloop transitions, 84 changer transitions 0/373 dead transitions. [2024-06-21 18:57:07,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 373 transitions, 5123 flow [2024-06-21 18:57:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:57:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:57:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 18:57:07,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 18:57:07,693 INFO L175 Difference]: Start difference. First operand has 404 places, 360 transitions, 4291 flow. Second operand 9 states and 122 transitions. [2024-06-21 18:57:07,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 373 transitions, 5123 flow [2024-06-21 18:57:08,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 373 transitions, 4894 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:08,444 INFO L231 Difference]: Finished difference. Result has 403 places, 362 transitions, 4306 flow [2024-06-21 18:57:08,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4306, PETRI_PLACES=403, PETRI_TRANSITIONS=362} [2024-06-21 18:57:08,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 373 predicate places. [2024-06-21 18:57:08,445 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 362 transitions, 4306 flow [2024-06-21 18:57:08,445 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 18:57:08,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:08,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 18:57:08,445 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:08,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1461499481, now seen corresponding path program 16 times [2024-06-21 18:57:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:08,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928364184] [2024-06-21 18:57:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:10,104 INFO 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 18:57:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928364184] [2024-06-21 18:57:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928364184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:10,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511480000] [2024-06-21 18:57:10,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:10,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 362 transitions, 4306 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:10,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:10,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:10,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:10,939 INFO L124 PetriNetUnfolderBase]: 780/1391 cut-off events. [2024-06-21 18:57:10,939 INFO L125 PetriNetUnfolderBase]: For 200382/200382 co-relation queries the response was YES. [2024-06-21 18:57:10,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11095 conditions, 1391 events. 780/1391 cut-off events. For 200382/200382 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 7681 event pairs, 86 based on Foata normal form. 2/1391 useless extension candidates. Maximal degree in co-relation 10918. Up to 1035 conditions per place. [2024-06-21 18:57:10,957 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 268 selfloop transitions, 113 changer transitions 0/383 dead transitions. [2024-06-21 18:57:10,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 383 transitions, 5670 flow [2024-06-21 18:57:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 18:57:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 18:57:10,958 INFO L175 Difference]: Start difference. First operand has 403 places, 362 transitions, 4306 flow. Second operand 11 states and 139 transitions. [2024-06-21 18:57:10,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 383 transitions, 5670 flow [2024-06-21 18:57:11,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 383 transitions, 5445 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 18:57:11,741 INFO L231 Difference]: Finished difference. Result has 405 places, 364 transitions, 4350 flow [2024-06-21 18:57:11,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4350, PETRI_PLACES=405, PETRI_TRANSITIONS=364} [2024-06-21 18:57:11,741 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2024-06-21 18:57:11,741 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 364 transitions, 4350 flow [2024-06-21 18:57:11,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:11,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:11,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 18:57:11,742 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:11,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1461499698, now seen corresponding path program 29 times [2024-06-21 18:57:11,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:11,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711984655] [2024-06-21 18:57:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:11,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711984655] [2024-06-21 18:57:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711984655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119655147] [2024-06-21 18:57:13,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:13,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:57:13,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 364 transitions, 4350 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 18:57:13,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:13,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:57:13,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:13,676 INFO L124 PetriNetUnfolderBase]: 783/1395 cut-off events. [2024-06-21 18:57:13,676 INFO L125 PetriNetUnfolderBase]: For 193237/193237 co-relation queries the response was YES. [2024-06-21 18:57:13,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11207 conditions, 1395 events. 783/1395 cut-off events. For 193237/193237 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 7699 event pairs, 87 based on Foata normal form. 1/1394 useless extension candidates. Maximal degree in co-relation 11030. Up to 1211 conditions per place. [2024-06-21 18:57:13,693 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 286 selfloop transitions, 89 changer transitions 0/377 dead transitions. [2024-06-21 18:57:13,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 377 transitions, 5194 flow [2024-06-21 18:57:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:57:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:57:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 18:57:13,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 18:57:13,695 INFO L175 Difference]: Start difference. First operand has 405 places, 364 transitions, 4350 flow. Second operand 9 states and 121 transitions. [2024-06-21 18:57:13,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 377 transitions, 5194 flow [2024-06-21 18:57:14,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 377 transitions, 4969 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:14,412 INFO L231 Difference]: Finished difference. Result has 406 places, 366 transitions, 4383 flow [2024-06-21 18:57:14,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4383, PETRI_PLACES=406, PETRI_TRANSITIONS=366} [2024-06-21 18:57:14,412 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2024-06-21 18:57:14,412 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 366 transitions, 4383 flow [2024-06-21 18:57:14,413 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 18:57:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 18:57:14,413 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:14,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1461701291, now seen corresponding path program 17 times [2024-06-21 18:57:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:14,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164722842] [2024-06-21 18:57:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:16,031 INFO 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 18:57:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164722842] [2024-06-21 18:57:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164722842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:16,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:16,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:57:16,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139163827] [2024-06-21 18:57:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:16,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:57:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:57:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:57:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 366 transitions, 4383 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:16,867 INFO L124 PetriNetUnfolderBase]: 779/1390 cut-off events. [2024-06-21 18:57:16,867 INFO L125 PetriNetUnfolderBase]: For 188288/188288 co-relation queries the response was YES. [2024-06-21 18:57:16,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10858 conditions, 1390 events. 779/1390 cut-off events. For 188288/188288 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 7679 event pairs, 85 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 10681. Up to 1037 conditions per place. [2024-06-21 18:57:16,886 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 272 selfloop transitions, 110 changer transitions 0/384 dead transitions. [2024-06-21 18:57:16,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 384 transitions, 5469 flow [2024-06-21 18:57:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 18:57:16,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 18:57:16,887 INFO L175 Difference]: Start difference. First operand has 406 places, 366 transitions, 4383 flow. Second operand 11 states and 139 transitions. [2024-06-21 18:57:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 384 transitions, 5469 flow [2024-06-21 18:57:17,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 384 transitions, 5210 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:17,657 INFO L231 Difference]: Finished difference. Result has 409 places, 366 transitions, 4351 flow [2024-06-21 18:57:17,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4351, PETRI_PLACES=409, PETRI_TRANSITIONS=366} [2024-06-21 18:57:17,658 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-06-21 18:57:17,658 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 366 transitions, 4351 flow [2024-06-21 18:57:17,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 18:57:17,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:17,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:17,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 18:57:17,658 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:17,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1461707088, now seen corresponding path program 30 times [2024-06-21 18:57:17,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:17,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393581256] [2024-06-21 18:57:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:17,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:19,346 INFO 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 18:57:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393581256] [2024-06-21 18:57:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393581256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:19,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:19,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282333193] [2024-06-21 18:57:19,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:19,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:19,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 18:57:19,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 366 transitions, 4351 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:19,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:19,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 18:57:19,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:20,133 INFO L124 PetriNetUnfolderBase]: 793/1412 cut-off events. [2024-06-21 18:57:20,133 INFO L125 PetriNetUnfolderBase]: For 204912/204912 co-relation queries the response was YES. [2024-06-21 18:57:20,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11236 conditions, 1412 events. 793/1412 cut-off events. For 204912/204912 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 7808 event pairs, 85 based on Foata normal form. 3/1413 useless extension candidates. Maximal degree in co-relation 11058. Up to 1000 conditions per place. [2024-06-21 18:57:20,150 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 253 selfloop transitions, 137 changer transitions 0/392 dead transitions. [2024-06-21 18:57:20,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 392 transitions, 5853 flow [2024-06-21 18:57:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-21 18:57:20,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 18:57:20,151 INFO L175 Difference]: Start difference. First operand has 409 places, 366 transitions, 4351 flow. Second operand 11 states and 155 transitions. [2024-06-21 18:57:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 392 transitions, 5853 flow [2024-06-21 18:57:20,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 392 transitions, 5586 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 18:57:20,941 INFO L231 Difference]: Finished difference. Result has 411 places, 370 transitions, 4505 flow [2024-06-21 18:57:20,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4084, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4505, PETRI_PLACES=411, PETRI_TRANSITIONS=370} [2024-06-21 18:57:20,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 18:57:20,942 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 370 transitions, 4505 flow [2024-06-21 18:57:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:20,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 18:57:20,942 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:20,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 23948350, now seen corresponding path program 1 times [2024-06-21 18:57:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:20,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486309215] [2024-06-21 18:57:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:22,465 INFO 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 18:57:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486309215] [2024-06-21 18:57:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486309215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338310005] [2024-06-21 18:57:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:22,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:22,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 370 transitions, 4505 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:22,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:22,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:23,142 INFO L124 PetriNetUnfolderBase]: 804/1434 cut-off events. [2024-06-21 18:57:23,142 INFO L125 PetriNetUnfolderBase]: For 217680/217680 co-relation queries the response was YES. [2024-06-21 18:57:23,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11755 conditions, 1434 events. 804/1434 cut-off events. For 217680/217680 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 7978 event pairs, 158 based on Foata normal form. 2/1434 useless extension candidates. Maximal degree in co-relation 11576. Up to 1254 conditions per place. [2024-06-21 18:57:23,160 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 357 selfloop transitions, 33 changer transitions 0/392 dead transitions. [2024-06-21 18:57:23,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 392 transitions, 5645 flow [2024-06-21 18:57:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 18:57:23,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 18:57:23,161 INFO L175 Difference]: Start difference. First operand has 411 places, 370 transitions, 4505 flow. Second operand 12 states and 137 transitions. [2024-06-21 18:57:23,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 392 transitions, 5645 flow [2024-06-21 18:57:23,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 392 transitions, 5399 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:23,980 INFO L231 Difference]: Finished difference. Result has 415 places, 372 transitions, 4395 flow [2024-06-21 18:57:23,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4395, PETRI_PLACES=415, PETRI_TRANSITIONS=372} [2024-06-21 18:57:23,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-21 18:57:23,980 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 372 transitions, 4395 flow [2024-06-21 18:57:23,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:23,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:23,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 18:57:23,981 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:23,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1636302906, now seen corresponding path program 2 times [2024-06-21 18:57:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:23,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214896224] [2024-06-21 18:57:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:25,664 INFO 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 18:57:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:25,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214896224] [2024-06-21 18:57:25,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214896224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:25,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:25,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531902163] [2024-06-21 18:57:25,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:25,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:25,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 372 transitions, 4395 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:25,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:25,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:25,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:26,393 INFO L124 PetriNetUnfolderBase]: 815/1455 cut-off events. [2024-06-21 18:57:26,394 INFO L125 PetriNetUnfolderBase]: For 227721/227721 co-relation queries the response was YES. [2024-06-21 18:57:26,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12050 conditions, 1455 events. 815/1455 cut-off events. For 227721/227721 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 8133 event pairs, 162 based on Foata normal form. 2/1455 useless extension candidates. Maximal degree in co-relation 11870. Up to 1349 conditions per place. [2024-06-21 18:57:26,412 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 357 selfloop transitions, 33 changer transitions 0/392 dead transitions. [2024-06-21 18:57:26,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 392 transitions, 5531 flow [2024-06-21 18:57:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:57:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:57:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2024-06-21 18:57:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:57:26,413 INFO L175 Difference]: Start difference. First operand has 415 places, 372 transitions, 4395 flow. Second operand 13 states and 143 transitions. [2024-06-21 18:57:26,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 392 transitions, 5531 flow [2024-06-21 18:57:27,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 392 transitions, 5426 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 18:57:27,358 INFO L231 Difference]: Finished difference. Result has 420 places, 374 transitions, 4426 flow [2024-06-21 18:57:27,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4426, PETRI_PLACES=420, PETRI_TRANSITIONS=374} [2024-06-21 18:57:27,359 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 390 predicate places. [2024-06-21 18:57:27,359 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 374 transitions, 4426 flow [2024-06-21 18:57:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:27,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:27,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 18:57:27,360 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 82160770, now seen corresponding path program 3 times [2024-06-21 18:57:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315479525] [2024-06-21 18:57:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315479525] [2024-06-21 18:57:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315479525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:29,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:29,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028103079] [2024-06-21 18:57:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:29,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:29,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:29,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 374 transitions, 4426 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:29,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:29,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:29,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:29,753 INFO L124 PetriNetUnfolderBase]: 819/1463 cut-off events. [2024-06-21 18:57:29,753 INFO L125 PetriNetUnfolderBase]: For 232194/232194 co-relation queries the response was YES. [2024-06-21 18:57:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12042 conditions, 1463 events. 819/1463 cut-off events. For 232194/232194 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 8196 event pairs, 168 based on Foata normal form. 2/1463 useless extension candidates. Maximal degree in co-relation 11860. Up to 1392 conditions per place. [2024-06-21 18:57:29,771 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 356 selfloop transitions, 32 changer transitions 0/390 dead transitions. [2024-06-21 18:57:29,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 390 transitions, 5262 flow [2024-06-21 18:57:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:57:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:57:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 138 transitions. [2024-06-21 18:57:29,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424317617866005 [2024-06-21 18:57:29,772 INFO L175 Difference]: Start difference. First operand has 420 places, 374 transitions, 4426 flow. Second operand 13 states and 138 transitions. [2024-06-21 18:57:29,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 390 transitions, 5262 flow [2024-06-21 18:57:30,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 390 transitions, 5205 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:57:30,771 INFO L231 Difference]: Finished difference. Result has 424 places, 375 transitions, 4461 flow [2024-06-21 18:57:30,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4461, PETRI_PLACES=424, PETRI_TRANSITIONS=375} [2024-06-21 18:57:30,771 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 394 predicate places. [2024-06-21 18:57:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 375 transitions, 4461 flow [2024-06-21 18:57:30,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:30,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:30,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 18:57:30,772 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:30,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash 82160956, now seen corresponding path program 1 times [2024-06-21 18:57:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:30,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677710144] [2024-06-21 18:57:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:32,856 INFO 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 18:57:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677710144] [2024-06-21 18:57:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677710144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:32,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:32,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:32,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842881594] [2024-06-21 18:57:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:32,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:32,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 375 transitions, 4461 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:32,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:32,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:32,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:33,685 INFO L124 PetriNetUnfolderBase]: 841/1499 cut-off events. [2024-06-21 18:57:33,686 INFO L125 PetriNetUnfolderBase]: For 252878/252878 co-relation queries the response was YES. [2024-06-21 18:57:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12726 conditions, 1499 events. 841/1499 cut-off events. For 252878/252878 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 8429 event pairs, 172 based on Foata normal form. 2/1499 useless extension candidates. Maximal degree in co-relation 12542. Up to 1401 conditions per place. [2024-06-21 18:57:33,705 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 361 selfloop transitions, 36 changer transitions 0/399 dead transitions. [2024-06-21 18:57:33,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 399 transitions, 5718 flow [2024-06-21 18:57:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 18:57:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 18:57:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-21 18:57:33,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-21 18:57:33,706 INFO L175 Difference]: Start difference. First operand has 424 places, 375 transitions, 4461 flow. Second operand 13 states and 144 transitions. [2024-06-21 18:57:33,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 399 transitions, 5718 flow [2024-06-21 18:57:34,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 399 transitions, 5640 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 18:57:34,723 INFO L231 Difference]: Finished difference. Result has 427 places, 381 transitions, 4634 flow [2024-06-21 18:57:34,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4634, PETRI_PLACES=427, PETRI_TRANSITIONS=381} [2024-06-21 18:57:34,723 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2024-06-21 18:57:34,723 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 381 transitions, 4634 flow [2024-06-21 18:57:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:34,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:34,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 18:57:34,723 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:34,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash 210442782, now seen corresponding path program 4 times [2024-06-21 18:57:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:34,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687200070] [2024-06-21 18:57:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:36,315 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 18:57:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687200070] [2024-06-21 18:57:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687200070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:36,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:36,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:36,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670086570] [2024-06-21 18:57:36,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:36,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:36,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:36,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:36,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 381 transitions, 4634 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:36,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:36,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:36,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:37,112 INFO L124 PetriNetUnfolderBase]: 838/1494 cut-off events. [2024-06-21 18:57:37,112 INFO L125 PetriNetUnfolderBase]: For 240965/240965 co-relation queries the response was YES. [2024-06-21 18:57:37,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 1494 events. 838/1494 cut-off events. For 240965/240965 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 8392 event pairs, 169 based on Foata normal form. 2/1494 useless extension candidates. Maximal degree in co-relation 12335. Up to 1409 conditions per place. [2024-06-21 18:57:37,132 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 362 selfloop transitions, 33 changer transitions 0/397 dead transitions. [2024-06-21 18:57:37,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 397 transitions, 5464 flow [2024-06-21 18:57:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 18:57:37,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 18:57:37,133 INFO L175 Difference]: Start difference. First operand has 427 places, 381 transitions, 4634 flow. Second operand 12 states and 134 transitions. [2024-06-21 18:57:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 397 transitions, 5464 flow [2024-06-21 18:57:38,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 397 transitions, 5338 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 18:57:38,263 INFO L231 Difference]: Finished difference. Result has 430 places, 381 transitions, 4578 flow [2024-06-21 18:57:38,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4578, PETRI_PLACES=430, PETRI_TRANSITIONS=381} [2024-06-21 18:57:38,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 400 predicate places. [2024-06-21 18:57:38,264 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 381 transitions, 4578 flow [2024-06-21 18:57:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:38,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:38,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 18:57:38,264 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:38,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1058260626, now seen corresponding path program 5 times [2024-06-21 18:57:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941374807] [2024-06-21 18:57:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:39,938 INFO 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 18:57:39,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:39,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941374807] [2024-06-21 18:57:39,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941374807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:39,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:39,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632605969] [2024-06-21 18:57:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:40,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:40,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 381 transitions, 4578 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:40,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:40,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:40,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:40,712 INFO L124 PetriNetUnfolderBase]: 842/1502 cut-off events. [2024-06-21 18:57:40,712 INFO L125 PetriNetUnfolderBase]: For 243651/243651 co-relation queries the response was YES. [2024-06-21 18:57:40,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12487 conditions, 1502 events. 842/1502 cut-off events. For 243651/243651 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 8474 event pairs, 171 based on Foata normal form. 2/1502 useless extension candidates. Maximal degree in co-relation 12299. Up to 1460 conditions per place. [2024-06-21 18:57:40,732 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 374 selfloop transitions, 19 changer transitions 0/395 dead transitions. [2024-06-21 18:57:40,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 395 transitions, 5418 flow [2024-06-21 18:57:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 123 transitions. [2024-06-21 18:57:40,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2024-06-21 18:57:40,733 INFO L175 Difference]: Start difference. First operand has 430 places, 381 transitions, 4578 flow. Second operand 12 states and 123 transitions. [2024-06-21 18:57:40,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 395 transitions, 5418 flow [2024-06-21 18:57:41,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 395 transitions, 5346 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 18:57:41,831 INFO L231 Difference]: Finished difference. Result has 431 places, 382 transitions, 4572 flow [2024-06-21 18:57:41,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4572, PETRI_PLACES=431, PETRI_TRANSITIONS=382} [2024-06-21 18:57:41,831 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 401 predicate places. [2024-06-21 18:57:41,832 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 382 transitions, 4572 flow [2024-06-21 18:57:41,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:41,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:41,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:41,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 18:57:41,832 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:41,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1520718600, now seen corresponding path program 2 times [2024-06-21 18:57:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186864930] [2024-06-21 18:57:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:43,709 INFO 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 18:57:43,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186864930] [2024-06-21 18:57:43,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186864930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:43,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:43,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:43,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644602935] [2024-06-21 18:57:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:43,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:43,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 382 transitions, 4572 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:43,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:43,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:43,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:44,521 INFO L124 PetriNetUnfolderBase]: 848/1512 cut-off events. [2024-06-21 18:57:44,522 INFO L125 PetriNetUnfolderBase]: For 247765/247765 co-relation queries the response was YES. [2024-06-21 18:57:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12600 conditions, 1512 events. 848/1512 cut-off events. For 247765/247765 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 8530 event pairs, 171 based on Foata normal form. 2/1512 useless extension candidates. Maximal degree in co-relation 12411. Up to 1470 conditions per place. [2024-06-21 18:57:44,542 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 375 selfloop transitions, 20 changer transitions 0/397 dead transitions. [2024-06-21 18:57:44,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 397 transitions, 5454 flow [2024-06-21 18:57:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-21 18:57:44,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 18:57:44,543 INFO L175 Difference]: Start difference. First operand has 431 places, 382 transitions, 4572 flow. Second operand 12 states and 124 transitions. [2024-06-21 18:57:44,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 397 transitions, 5454 flow [2024-06-21 18:57:45,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 397 transitions, 5400 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:45,633 INFO L231 Difference]: Finished difference. Result has 433 places, 384 transitions, 4619 flow [2024-06-21 18:57:45,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4619, PETRI_PLACES=433, PETRI_TRANSITIONS=384} [2024-06-21 18:57:45,634 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2024-06-21 18:57:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 384 transitions, 4619 flow [2024-06-21 18:57:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:45,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:45,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:45,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 18:57:45,634 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:45,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1520891766, now seen corresponding path program 6 times [2024-06-21 18:57:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053825304] [2024-06-21 18:57:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:47,397 INFO 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 18:57:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053825304] [2024-06-21 18:57:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053825304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469114315] [2024-06-21 18:57:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:47,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:47,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 384 transitions, 4619 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:47,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:47,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:47,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:48,241 INFO L124 PetriNetUnfolderBase]: 852/1520 cut-off events. [2024-06-21 18:57:48,242 INFO L125 PetriNetUnfolderBase]: For 251654/251654 co-relation queries the response was YES. [2024-06-21 18:57:48,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12671 conditions, 1520 events. 852/1520 cut-off events. For 251654/251654 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 8594 event pairs, 173 based on Foata normal form. 2/1520 useless extension candidates. Maximal degree in co-relation 12481. Up to 1472 conditions per place. [2024-06-21 18:57:48,263 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 374 selfloop transitions, 22 changer transitions 0/398 dead transitions. [2024-06-21 18:57:48,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 398 transitions, 5467 flow [2024-06-21 18:57:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 18:57:48,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 18:57:48,264 INFO L175 Difference]: Start difference. First operand has 433 places, 384 transitions, 4619 flow. Second operand 12 states and 125 transitions. [2024-06-21 18:57:48,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 398 transitions, 5467 flow [2024-06-21 18:57:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 398 transitions, 5390 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:49,393 INFO L231 Difference]: Finished difference. Result has 435 places, 385 transitions, 4616 flow [2024-06-21 18:57:49,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4616, PETRI_PLACES=435, PETRI_TRANSITIONS=385} [2024-06-21 18:57:49,393 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 405 predicate places. [2024-06-21 18:57:49,393 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 385 transitions, 4616 flow [2024-06-21 18:57:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:49,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:49,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 18:57:49,394 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1520891580, now seen corresponding path program 3 times [2024-06-21 18:57:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291601749] [2024-06-21 18:57:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291601749] [2024-06-21 18:57:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291601749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:51,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:51,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24543273] [2024-06-21 18:57:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:51,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:51,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:51,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:51,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 385 transitions, 4616 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:51,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:51,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:51,854 INFO L124 PetriNetUnfolderBase]: 858/1530 cut-off events. [2024-06-21 18:57:51,854 INFO L125 PetriNetUnfolderBase]: For 255439/255439 co-relation queries the response was YES. [2024-06-21 18:57:51,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12763 conditions, 1530 events. 858/1530 cut-off events. For 255439/255439 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 8641 event pairs, 173 based on Foata normal form. 2/1530 useless extension candidates. Maximal degree in co-relation 12572. Up to 1476 conditions per place. [2024-06-21 18:57:51,873 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 375 selfloop transitions, 24 changer transitions 0/401 dead transitions. [2024-06-21 18:57:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 401 transitions, 5520 flow [2024-06-21 18:57:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 18:57:51,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 18:57:51,873 INFO L175 Difference]: Start difference. First operand has 435 places, 385 transitions, 4616 flow. Second operand 12 states and 128 transitions. [2024-06-21 18:57:51,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 401 transitions, 5520 flow [2024-06-21 18:57:52,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 401 transitions, 5458 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:52,995 INFO L231 Difference]: Finished difference. Result has 437 places, 387 transitions, 4667 flow [2024-06-21 18:57:52,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4554, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4667, PETRI_PLACES=437, PETRI_TRANSITIONS=387} [2024-06-21 18:57:52,995 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 407 predicate places. [2024-06-21 18:57:52,995 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 387 transitions, 4667 flow [2024-06-21 18:57:52,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:52,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:52,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:52,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 18:57:52,995 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:52,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1397078404, now seen corresponding path program 7 times [2024-06-21 18:57:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373519469] [2024-06-21 18:57:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:54,662 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 18:57:54,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:54,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373519469] [2024-06-21 18:57:54,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373519469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:54,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:54,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:57:54,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265326285] [2024-06-21 18:57:54,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:54,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:57:54,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:57:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:57:54,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:54,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 387 transitions, 4667 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:54,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:54,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:54,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:55,501 INFO L124 PetriNetUnfolderBase]: 869/1551 cut-off events. [2024-06-21 18:57:55,502 INFO L125 PetriNetUnfolderBase]: For 277105/277105 co-relation queries the response was YES. [2024-06-21 18:57:55,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13200 conditions, 1551 events. 869/1551 cut-off events. For 277105/277105 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8799 event pairs, 174 based on Foata normal form. 2/1551 useless extension candidates. Maximal degree in co-relation 13008. Up to 1477 conditions per place. [2024-06-21 18:57:55,523 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 375 selfloop transitions, 27 changer transitions 0/404 dead transitions. [2024-06-21 18:57:55,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 404 transitions, 5823 flow [2024-06-21 18:57:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:57:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:57:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 18:57:55,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 18:57:55,525 INFO L175 Difference]: Start difference. First operand has 437 places, 387 transitions, 4667 flow. Second operand 11 states and 124 transitions. [2024-06-21 18:57:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 404 transitions, 5823 flow [2024-06-21 18:57:56,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 404 transitions, 5734 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-21 18:57:56,825 INFO L231 Difference]: Finished difference. Result has 438 places, 389 transitions, 4690 flow [2024-06-21 18:57:56,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4690, PETRI_PLACES=438, PETRI_TRANSITIONS=389} [2024-06-21 18:57:56,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2024-06-21 18:57:56,826 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 389 transitions, 4690 flow [2024-06-21 18:57:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:57:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:56,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 18:57:56,826 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:57:56,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1392609754, now seen corresponding path program 8 times [2024-06-21 18:57:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:56,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381543274] [2024-06-21 18:57:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:58,552 INFO 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 18:57:58,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:58,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381543274] [2024-06-21 18:57:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381543274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:58,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:58,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:57:58,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78420855] [2024-06-21 18:57:58,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:57:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:57:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:57:58,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:57:58,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 389 transitions, 4690 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:57:58,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:58,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:57:58,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:59,376 INFO L124 PetriNetUnfolderBase]: 873/1559 cut-off events. [2024-06-21 18:57:59,376 INFO L125 PetriNetUnfolderBase]: For 280941/280941 co-relation queries the response was YES. [2024-06-21 18:57:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13242 conditions, 1559 events. 873/1559 cut-off events. For 280941/280941 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8878 event pairs, 176 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 13049. Up to 1491 conditions per place. [2024-06-21 18:57:59,397 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 378 selfloop transitions, 24 changer transitions 0/404 dead transitions. [2024-06-21 18:57:59,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 404 transitions, 5556 flow [2024-06-21 18:57:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:57:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:57:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-21 18:57:59,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 18:57:59,398 INFO L175 Difference]: Start difference. First operand has 438 places, 389 transitions, 4690 flow. Second operand 12 states and 126 transitions. [2024-06-21 18:57:59,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 404 transitions, 5556 flow [2024-06-21 18:58:00,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 404 transitions, 5499 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:58:00,630 INFO L231 Difference]: Finished difference. Result has 443 places, 390 transitions, 4715 flow [2024-06-21 18:58:00,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4633, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4715, PETRI_PLACES=443, PETRI_TRANSITIONS=390} [2024-06-21 18:58:00,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2024-06-21 18:58:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 390 transitions, 4715 flow [2024-06-21 18:58:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:00,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:00,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 18:58:00,631 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:00,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1397193724, now seen corresponding path program 9 times [2024-06-21 18:58:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:00,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660987912] [2024-06-21 18:58:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:00,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:02,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660987912] [2024-06-21 18:58:02,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660987912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:02,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001535178] [2024-06-21 18:58:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:02,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:02,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:02,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 390 transitions, 4715 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:02,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:02,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:02,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:02,945 INFO L124 PetriNetUnfolderBase]: 870/1554 cut-off events. [2024-06-21 18:58:02,946 INFO L125 PetriNetUnfolderBase]: For 266994/266994 co-relation queries the response was YES. [2024-06-21 18:58:02,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12964 conditions, 1554 events. 870/1554 cut-off events. For 266994/266994 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8858 event pairs, 173 based on Foata normal form. 2/1554 useless extension candidates. Maximal degree in co-relation 12769. Up to 1432 conditions per place. [2024-06-21 18:58:02,967 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 373 selfloop transitions, 31 changer transitions 0/406 dead transitions. [2024-06-21 18:58:02,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 406 transitions, 5829 flow [2024-06-21 18:58:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 18:58:02,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 18:58:02,968 INFO L175 Difference]: Start difference. First operand has 443 places, 390 transitions, 4715 flow. Second operand 11 states and 124 transitions. [2024-06-21 18:58:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 406 transitions, 5829 flow [2024-06-21 18:58:04,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 406 transitions, 5759 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:04,145 INFO L231 Difference]: Finished difference. Result has 444 places, 390 transitions, 4711 flow [2024-06-21 18:58:04,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4711, PETRI_PLACES=444, PETRI_TRANSITIONS=390} [2024-06-21 18:58:04,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2024-06-21 18:58:04,146 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 390 transitions, 4711 flow [2024-06-21 18:58:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:04,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:04,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 18:58:04,147 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:04,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1397073754, now seen corresponding path program 10 times [2024-06-21 18:58:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820097598] [2024-06-21 18:58:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:05,820 INFO 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 18:58:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:05,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820097598] [2024-06-21 18:58:05,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820097598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:05,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:05,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:05,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327552074] [2024-06-21 18:58:05,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:05,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:06,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:06,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 390 transitions, 4711 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:06,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:06,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:06,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:06,682 INFO L124 PetriNetUnfolderBase]: 867/1549 cut-off events. [2024-06-21 18:58:06,682 INFO L125 PetriNetUnfolderBase]: For 252538/252538 co-relation queries the response was YES. [2024-06-21 18:58:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12670 conditions, 1549 events. 867/1549 cut-off events. For 252538/252538 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8830 event pairs, 176 based on Foata normal form. 2/1549 useless extension candidates. Maximal degree in co-relation 12474. Up to 1492 conditions per place. [2024-06-21 18:58:06,699 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 375 selfloop transitions, 26 changer transitions 0/403 dead transitions. [2024-06-21 18:58:06,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 403 transitions, 5545 flow [2024-06-21 18:58:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 18:58:06,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 18:58:06,700 INFO L175 Difference]: Start difference. First operand has 444 places, 390 transitions, 4711 flow. Second operand 12 states and 127 transitions. [2024-06-21 18:58:06,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 403 transitions, 5545 flow [2024-06-21 18:58:07,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 403 transitions, 5385 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-21 18:58:07,829 INFO L231 Difference]: Finished difference. Result has 444 places, 390 transitions, 4607 flow [2024-06-21 18:58:07,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4607, PETRI_PLACES=444, PETRI_TRANSITIONS=390} [2024-06-21 18:58:07,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2024-06-21 18:58:07,830 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 390 transitions, 4607 flow [2024-06-21 18:58:07,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:07,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:07,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:07,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 18:58:07,831 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:07,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1397073568, now seen corresponding path program 4 times [2024-06-21 18:58:07,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:07,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286766203] [2024-06-21 18:58:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:07,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:09,578 INFO 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 18:58:09,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:09,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286766203] [2024-06-21 18:58:09,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286766203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:09,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:09,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:09,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008004222] [2024-06-21 18:58:09,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:09,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:09,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:09,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:09,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 390 transitions, 4607 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:09,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:09,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:09,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:10,371 INFO L124 PetriNetUnfolderBase]: 863/1543 cut-off events. [2024-06-21 18:58:10,371 INFO L125 PetriNetUnfolderBase]: For 236950/236950 co-relation queries the response was YES. [2024-06-21 18:58:10,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12152 conditions, 1543 events. 863/1543 cut-off events. For 236950/236950 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8806 event pairs, 175 based on Foata normal form. 2/1543 useless extension candidates. Maximal degree in co-relation 11957. Up to 1474 conditions per place. [2024-06-21 18:58:10,392 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 373 selfloop transitions, 29 changer transitions 0/404 dead transitions. [2024-06-21 18:58:10,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 404 transitions, 5461 flow [2024-06-21 18:58:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 18:58:10,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 18:58:10,393 INFO L175 Difference]: Start difference. First operand has 444 places, 390 transitions, 4607 flow. Second operand 12 states and 130 transitions. [2024-06-21 18:58:10,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 404 transitions, 5461 flow [2024-06-21 18:58:11,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 404 transitions, 5375 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 18:58:11,571 INFO L231 Difference]: Finished difference. Result has 445 places, 390 transitions, 4584 flow [2024-06-21 18:58:11,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4584, PETRI_PLACES=445, PETRI_TRANSITIONS=390} [2024-06-21 18:58:11,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2024-06-21 18:58:11,571 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 390 transitions, 4584 flow [2024-06-21 18:58:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:11,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:11,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 18:58:11,572 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:11,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2100711300, now seen corresponding path program 11 times [2024-06-21 18:58:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914404563] [2024-06-21 18:58:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:13,261 INFO 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 18:58:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914404563] [2024-06-21 18:58:13,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914404563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:13,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:13,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761660173] [2024-06-21 18:58:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:13,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:13,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 390 transitions, 4584 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:13,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:13,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:13,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:13,978 INFO L124 PetriNetUnfolderBase]: 874/1564 cut-off events. [2024-06-21 18:58:13,978 INFO L125 PetriNetUnfolderBase]: For 259403/259403 co-relation queries the response was YES. [2024-06-21 18:58:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12598 conditions, 1564 events. 874/1564 cut-off events. For 259403/259403 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 8966 event pairs, 180 based on Foata normal form. 2/1564 useless extension candidates. Maximal degree in co-relation 12402. Up to 1391 conditions per place. [2024-06-21 18:58:13,999 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 339 selfloop transitions, 65 changer transitions 0/406 dead transitions. [2024-06-21 18:58:13,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 406 transitions, 5762 flow [2024-06-21 18:58:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 18:58:14,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 18:58:14,001 INFO L175 Difference]: Start difference. First operand has 445 places, 390 transitions, 4584 flow. Second operand 12 states and 139 transitions. [2024-06-21 18:58:14,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 406 transitions, 5762 flow [2024-06-21 18:58:15,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 406 transitions, 5691 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:15,153 INFO L231 Difference]: Finished difference. Result has 447 places, 392 transitions, 4713 flow [2024-06-21 18:58:15,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4713, PETRI_PLACES=447, PETRI_TRANSITIONS=392} [2024-06-21 18:58:15,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 417 predicate places. [2024-06-21 18:58:15,154 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 392 transitions, 4713 flow [2024-06-21 18:58:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:15,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:15,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 18:58:15,154 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2100706650, now seen corresponding path program 12 times [2024-06-21 18:58:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272942416] [2024-06-21 18:58:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:16,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:16,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272942416] [2024-06-21 18:58:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272942416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:16,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:16,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441513754] [2024-06-21 18:58:16,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:16,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:16,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 392 transitions, 4713 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:16,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:16,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:16,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:17,248 INFO L124 PetriNetUnfolderBase]: 878/1572 cut-off events. [2024-06-21 18:58:17,248 INFO L125 PetriNetUnfolderBase]: For 264062/264062 co-relation queries the response was YES. [2024-06-21 18:58:17,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12763 conditions, 1572 events. 878/1572 cut-off events. For 264062/264062 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9030 event pairs, 179 based on Foata normal form. 2/1572 useless extension candidates. Maximal degree in co-relation 12566. Up to 1437 conditions per place. [2024-06-21 18:58:17,269 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 344 selfloop transitions, 59 changer transitions 0/405 dead transitions. [2024-06-21 18:58:17,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 405 transitions, 5581 flow [2024-06-21 18:58:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 18:58:17,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 18:58:17,270 INFO L175 Difference]: Start difference. First operand has 447 places, 392 transitions, 4713 flow. Second operand 11 states and 128 transitions. [2024-06-21 18:58:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 405 transitions, 5581 flow [2024-06-21 18:58:18,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 405 transitions, 5444 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 18:58:18,537 INFO L231 Difference]: Finished difference. Result has 450 places, 393 transitions, 4734 flow [2024-06-21 18:58:18,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4734, PETRI_PLACES=450, PETRI_TRANSITIONS=393} [2024-06-21 18:58:18,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 420 predicate places. [2024-06-21 18:58:18,537 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 393 transitions, 4734 flow [2024-06-21 18:58:18,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:18,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:18,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:18,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 18:58:18,538 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:18,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2072409770, now seen corresponding path program 5 times [2024-06-21 18:58:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:18,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940455099] [2024-06-21 18:58:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:20,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940455099] [2024-06-21 18:58:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940455099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:20,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368444486] [2024-06-21 18:58:20,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:20,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:20,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 393 transitions, 4734 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:20,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:20,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:20,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:21,503 INFO L124 PetriNetUnfolderBase]: 884/1582 cut-off events. [2024-06-21 18:58:21,503 INFO L125 PetriNetUnfolderBase]: For 267112/267112 co-relation queries the response was YES. [2024-06-21 18:58:21,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12861 conditions, 1582 events. 884/1582 cut-off events. For 267112/267112 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 9074 event pairs, 183 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 12662. Up to 1323 conditions per place. [2024-06-21 18:58:21,526 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 322 selfloop transitions, 86 changer transitions 0/410 dead transitions. [2024-06-21 18:58:21,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 410 transitions, 5929 flow [2024-06-21 18:58:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 18:58:21,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 18:58:21,527 INFO L175 Difference]: Start difference. First operand has 450 places, 393 transitions, 4734 flow. Second operand 12 states and 142 transitions. [2024-06-21 18:58:21,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 410 transitions, 5929 flow [2024-06-21 18:58:22,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 410 transitions, 5797 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:58:22,789 INFO L231 Difference]: Finished difference. Result has 453 places, 395 transitions, 4832 flow [2024-06-21 18:58:22,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4832, PETRI_PLACES=453, PETRI_TRANSITIONS=395} [2024-06-21 18:58:22,789 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2024-06-21 18:58:22,789 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 395 transitions, 4832 flow [2024-06-21 18:58:22,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:22,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:22,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 18:58:22,790 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:22,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2066147150, now seen corresponding path program 6 times [2024-06-21 18:58:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:22,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805112677] [2024-06-21 18:58:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:22,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:24,664 INFO 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 18:58:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805112677] [2024-06-21 18:58:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805112677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:24,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831726509] [2024-06-21 18:58:24,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:24,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 395 transitions, 4832 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:25,491 INFO L124 PetriNetUnfolderBase]: 890/1592 cut-off events. [2024-06-21 18:58:25,491 INFO L125 PetriNetUnfolderBase]: For 271166/271166 co-relation queries the response was YES. [2024-06-21 18:58:25,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 1592 events. 890/1592 cut-off events. For 271166/271166 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 9140 event pairs, 181 based on Foata normal form. 2/1592 useless extension candidates. Maximal degree in co-relation 12884. Up to 1457 conditions per place. [2024-06-21 18:58:25,513 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 348 selfloop transitions, 59 changer transitions 0/409 dead transitions. [2024-06-21 18:58:25,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 409 transitions, 5752 flow [2024-06-21 18:58:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 18:58:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:58:25,514 INFO L175 Difference]: Start difference. First operand has 453 places, 395 transitions, 4832 flow. Second operand 12 states and 136 transitions. [2024-06-21 18:58:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 409 transitions, 5752 flow [2024-06-21 18:58:26,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 409 transitions, 5546 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:26,760 INFO L231 Difference]: Finished difference. Result has 455 places, 397 transitions, 4823 flow [2024-06-21 18:58:26,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4823, PETRI_PLACES=455, PETRI_TRANSITIONS=397} [2024-06-21 18:58:26,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2024-06-21 18:58:26,760 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 397 transitions, 4823 flow [2024-06-21 18:58:26,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:26,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:26,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:26,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 18:58:26,761 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:26,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2072403260, now seen corresponding path program 7 times [2024-06-21 18:58:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26871575] [2024-06-21 18:58:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:28,627 INFO 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 18:58:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26871575] [2024-06-21 18:58:28,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26871575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:28,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544613605] [2024-06-21 18:58:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:28,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:28,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 397 transitions, 4823 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:28,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:28,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:28,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:29,367 INFO L124 PetriNetUnfolderBase]: 896/1602 cut-off events. [2024-06-21 18:58:29,367 INFO L125 PetriNetUnfolderBase]: For 276244/276244 co-relation queries the response was YES. [2024-06-21 18:58:29,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13141 conditions, 1602 events. 896/1602 cut-off events. For 276244/276244 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9200 event pairs, 181 based on Foata normal form. 2/1602 useless extension candidates. Maximal degree in co-relation 12940. Up to 1467 conditions per place. [2024-06-21 18:58:29,389 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 348 selfloop transitions, 61 changer transitions 0/411 dead transitions. [2024-06-21 18:58:29,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 411 transitions, 5751 flow [2024-06-21 18:58:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 18:58:29,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 18:58:29,390 INFO L175 Difference]: Start difference. First operand has 455 places, 397 transitions, 4823 flow. Second operand 12 states and 135 transitions. [2024-06-21 18:58:29,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 411 transitions, 5751 flow [2024-06-21 18:58:30,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 411 transitions, 5572 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:30,659 INFO L231 Difference]: Finished difference. Result has 457 places, 399 transitions, 4849 flow [2024-06-21 18:58:30,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4849, PETRI_PLACES=457, PETRI_TRANSITIONS=399} [2024-06-21 18:58:30,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2024-06-21 18:58:30,659 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 399 transitions, 4849 flow [2024-06-21 18:58:30,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:30,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:30,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:30,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 18:58:30,660 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:30,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2066146964, now seen corresponding path program 13 times [2024-06-21 18:58:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:30,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763811318] [2024-06-21 18:58:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:32,305 INFO 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 18:58:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763811318] [2024-06-21 18:58:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763811318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616526663] [2024-06-21 18:58:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:32,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:32,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 399 transitions, 4849 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:32,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:33,033 INFO L124 PetriNetUnfolderBase]: 900/1610 cut-off events. [2024-06-21 18:58:33,034 INFO L125 PetriNetUnfolderBase]: For 279238/279238 co-relation queries the response was YES. [2024-06-21 18:58:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13148 conditions, 1610 events. 900/1610 cut-off events. For 279238/279238 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9263 event pairs, 182 based on Foata normal form. 2/1610 useless extension candidates. Maximal degree in co-relation 12946. Up to 1484 conditions per place. [2024-06-21 18:58:33,057 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 356 selfloop transitions, 54 changer transitions 0/412 dead transitions. [2024-06-21 18:58:33,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 412 transitions, 5719 flow [2024-06-21 18:58:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 18:58:33,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 18:58:33,058 INFO L175 Difference]: Start difference. First operand has 457 places, 399 transitions, 4849 flow. Second operand 12 states and 133 transitions. [2024-06-21 18:58:33,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 412 transitions, 5719 flow [2024-06-21 18:58:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 412 transitions, 5532 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:34,437 INFO L231 Difference]: Finished difference. Result has 459 places, 400 transitions, 4798 flow [2024-06-21 18:58:34,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4798, PETRI_PLACES=459, PETRI_TRANSITIONS=400} [2024-06-21 18:58:34,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 429 predicate places. [2024-06-21 18:58:34,438 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 400 transitions, 4798 flow [2024-06-21 18:58:34,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:34,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:34,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:34,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 18:58:34,438 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:34,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:34,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2072403074, now seen corresponding path program 14 times [2024-06-21 18:58:34,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:34,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130149575] [2024-06-21 18:58:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:36,052 INFO 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 18:58:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:36,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130149575] [2024-06-21 18:58:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130149575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730247242] [2024-06-21 18:58:36,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:36,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:36,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:36,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:36,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 400 transitions, 4798 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:36,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:36,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:36,745 INFO L124 PetriNetUnfolderBase]: 897/1605 cut-off events. [2024-06-21 18:58:36,746 INFO L125 PetriNetUnfolderBase]: For 261438/261438 co-relation queries the response was YES. [2024-06-21 18:58:36,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12740 conditions, 1605 events. 897/1605 cut-off events. For 261438/261438 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9254 event pairs, 181 based on Foata normal form. 2/1605 useless extension candidates. Maximal degree in co-relation 12537. Up to 1479 conditions per place. [2024-06-21 18:58:36,769 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 354 selfloop transitions, 56 changer transitions 0/412 dead transitions. [2024-06-21 18:58:36,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 412 transitions, 5646 flow [2024-06-21 18:58:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 18:58:36,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:58:36,771 INFO L175 Difference]: Start difference. First operand has 459 places, 400 transitions, 4798 flow. Second operand 12 states and 132 transitions. [2024-06-21 18:58:36,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 412 transitions, 5646 flow [2024-06-21 18:58:38,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 412 transitions, 5506 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 18:58:38,023 INFO L231 Difference]: Finished difference. Result has 461 places, 400 transitions, 4774 flow [2024-06-21 18:58:38,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4774, PETRI_PLACES=461, PETRI_TRANSITIONS=400} [2024-06-21 18:58:38,023 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-06-21 18:58:38,023 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 400 transitions, 4774 flow [2024-06-21 18:58:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:38,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:38,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 18:58:38,024 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:38,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1895266904, now seen corresponding path program 15 times [2024-06-21 18:58:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609159119] [2024-06-21 18:58:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:39,680 INFO 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 18:58:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609159119] [2024-06-21 18:58:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609159119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:39,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704133380] [2024-06-21 18:58:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:39,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:39,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 400 transitions, 4774 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:39,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:39,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:39,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:40,387 INFO L124 PetriNetUnfolderBase]: 908/1626 cut-off events. [2024-06-21 18:58:40,388 INFO L125 PetriNetUnfolderBase]: For 286230/286230 co-relation queries the response was YES. [2024-06-21 18:58:40,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13196 conditions, 1626 events. 908/1626 cut-off events. For 286230/286230 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 9397 event pairs, 181 based on Foata normal form. 2/1626 useless extension candidates. Maximal degree in co-relation 12992. Up to 1447 conditions per place. [2024-06-21 18:58:40,410 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 342 selfloop transitions, 72 changer transitions 0/416 dead transitions. [2024-06-21 18:58:40,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 416 transitions, 5990 flow [2024-06-21 18:58:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 18:58:40,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 18:58:40,412 INFO L175 Difference]: Start difference. First operand has 461 places, 400 transitions, 4774 flow. Second operand 11 states and 135 transitions. [2024-06-21 18:58:40,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 416 transitions, 5990 flow [2024-06-21 18:58:41,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 416 transitions, 5868 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:58:41,708 INFO L231 Difference]: Finished difference. Result has 461 places, 402 transitions, 4870 flow [2024-06-21 18:58:41,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4870, PETRI_PLACES=461, PETRI_TRANSITIONS=402} [2024-06-21 18:58:41,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-06-21 18:58:41,709 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 402 transitions, 4870 flow [2024-06-21 18:58:41,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:41,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:41,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:41,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 18:58:41,709 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:41,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2065974170, now seen corresponding path program 8 times [2024-06-21 18:58:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:41,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72060038] [2024-06-21 18:58:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:41,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:43,436 INFO 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 18:58:43,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:43,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72060038] [2024-06-21 18:58:43,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72060038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:43,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:43,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980148799] [2024-06-21 18:58:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:43,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:43,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:43,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 402 transitions, 4870 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:43,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:43,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:43,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:44,226 INFO L124 PetriNetUnfolderBase]: 914/1636 cut-off events. [2024-06-21 18:58:44,226 INFO L125 PetriNetUnfolderBase]: For 291520/291520 co-relation queries the response was YES. [2024-06-21 18:58:44,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13406 conditions, 1636 events. 914/1636 cut-off events. For 291520/291520 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9471 event pairs, 184 based on Foata normal form. 2/1636 useless extension candidates. Maximal degree in co-relation 13201. Up to 1471 conditions per place. [2024-06-21 18:58:44,250 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 345 selfloop transitions, 70 changer transitions 0/417 dead transitions. [2024-06-21 18:58:44,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 417 transitions, 5824 flow [2024-06-21 18:58:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 18:58:44,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 18:58:44,251 INFO L175 Difference]: Start difference. First operand has 461 places, 402 transitions, 4870 flow. Second operand 12 states and 141 transitions. [2024-06-21 18:58:44,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 417 transitions, 5824 flow [2024-06-21 18:58:45,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 417 transitions, 5688 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:58:45,612 INFO L231 Difference]: Finished difference. Result has 466 places, 404 transitions, 4961 flow [2024-06-21 18:58:45,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4961, PETRI_PLACES=466, PETRI_TRANSITIONS=404} [2024-06-21 18:58:45,612 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 436 predicate places. [2024-06-21 18:58:45,612 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 404 transitions, 4961 flow [2024-06-21 18:58:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:45,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:45,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:45,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 18:58:45,613 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:45,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2072640658, now seen corresponding path program 1 times [2024-06-21 18:58:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292724528] [2024-06-21 18:58:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:47,597 INFO 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 18:58:47,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:47,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292724528] [2024-06-21 18:58:47,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292724528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:47,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:47,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5571353] [2024-06-21 18:58:47,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:47,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:47,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:47,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 404 transitions, 4961 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:47,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:47,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:47,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:48,432 INFO L124 PetriNetUnfolderBase]: 912/1633 cut-off events. [2024-06-21 18:58:48,432 INFO L125 PetriNetUnfolderBase]: For 273173/273173 co-relation queries the response was YES. [2024-06-21 18:58:48,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13286 conditions, 1633 events. 912/1633 cut-off events. For 273173/273173 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 9477 event pairs, 185 based on Foata normal form. 1/1632 useless extension candidates. Maximal degree in co-relation 13079. Up to 1383 conditions per place. [2024-06-21 18:58:48,456 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 326 selfloop transitions, 87 changer transitions 0/415 dead transitions. [2024-06-21 18:58:48,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 415 transitions, 5821 flow [2024-06-21 18:58:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:58:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:58:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 18:58:48,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 18:58:48,457 INFO L175 Difference]: Start difference. First operand has 466 places, 404 transitions, 4961 flow. Second operand 11 states and 129 transitions. [2024-06-21 18:58:48,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 415 transitions, 5821 flow [2024-06-21 18:58:49,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 415 transitions, 5628 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-21 18:58:49,793 INFO L231 Difference]: Finished difference. Result has 468 places, 404 transitions, 4949 flow [2024-06-21 18:58:49,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4768, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4949, PETRI_PLACES=468, PETRI_TRANSITIONS=404} [2024-06-21 18:58:49,794 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 438 predicate places. [2024-06-21 18:58:49,794 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 404 transitions, 4949 flow [2024-06-21 18:58:49,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:49,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:49,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:49,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 18:58:49,795 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:49,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2023558402, now seen corresponding path program 9 times [2024-06-21 18:58:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:49,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337454898] [2024-06-21 18:58:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:49,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:51,544 INFO 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 18:58:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337454898] [2024-06-21 18:58:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337454898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:51,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:51,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:58:51,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026389352] [2024-06-21 18:58:51,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:51,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:58:51,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:58:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:58:51,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:51,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 404 transitions, 4949 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:51,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:51,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:51,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:52,368 INFO L124 PetriNetUnfolderBase]: 928/1659 cut-off events. [2024-06-21 18:58:52,368 INFO L125 PetriNetUnfolderBase]: For 310458/310458 co-relation queries the response was YES. [2024-06-21 18:58:52,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13926 conditions, 1659 events. 928/1659 cut-off events. For 310458/310458 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 9659 event pairs, 189 based on Foata normal form. 2/1659 useless extension candidates. Maximal degree in co-relation 13718. Up to 1459 conditions per place. [2024-06-21 18:58:52,393 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 341 selfloop transitions, 79 changer transitions 0/422 dead transitions. [2024-06-21 18:58:52,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 422 transitions, 6295 flow [2024-06-21 18:58:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 18:58:52,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 18:58:52,394 INFO L175 Difference]: Start difference. First operand has 468 places, 404 transitions, 4949 flow. Second operand 12 states and 144 transitions. [2024-06-21 18:58:52,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 422 transitions, 6295 flow [2024-06-21 18:58:53,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 422 transitions, 6094 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 18:58:53,836 INFO L231 Difference]: Finished difference. Result has 468 places, 408 transitions, 5081 flow [2024-06-21 18:58:53,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5081, PETRI_PLACES=468, PETRI_TRANSITIONS=408} [2024-06-21 18:58:53,837 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 438 predicate places. [2024-06-21 18:58:53,837 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 408 transitions, 5081 flow [2024-06-21 18:58:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:53,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:53,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 18:58:53,837 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2094040224, now seen corresponding path program 10 times [2024-06-21 18:58:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778451305] [2024-06-21 18:58:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:55,840 INFO 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 18:58:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778451305] [2024-06-21 18:58:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778451305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:58:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658077629] [2024-06-21 18:58:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:58:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:58:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:58:55,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:58:55,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 408 transitions, 5081 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:55,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:55,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:58:55,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:56,771 INFO L124 PetriNetUnfolderBase]: 934/1669 cut-off events. [2024-06-21 18:58:56,771 INFO L125 PetriNetUnfolderBase]: For 312109/312109 co-relation queries the response was YES. [2024-06-21 18:58:56,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13992 conditions, 1669 events. 934/1669 cut-off events. For 312109/312109 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 9664 event pairs, 188 based on Foata normal form. 2/1669 useless extension candidates. Maximal degree in co-relation 13786. Up to 1411 conditions per place. [2024-06-21 18:58:56,790 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 332 selfloop transitions, 89 changer transitions 0/423 dead transitions. [2024-06-21 18:58:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 423 transitions, 6021 flow [2024-06-21 18:58:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:58:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:58:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 18:58:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 18:58:56,791 INFO L175 Difference]: Start difference. First operand has 468 places, 408 transitions, 5081 flow. Second operand 12 states and 139 transitions. [2024-06-21 18:58:56,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 423 transitions, 6021 flow [2024-06-21 18:58:58,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 423 transitions, 5852 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 18:58:58,188 INFO L231 Difference]: Finished difference. Result has 472 places, 410 transitions, 5152 flow [2024-06-21 18:58:58,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4912, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5152, PETRI_PLACES=472, PETRI_TRANSITIONS=410} [2024-06-21 18:58:58,188 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2024-06-21 18:58:58,188 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 410 transitions, 5152 flow [2024-06-21 18:58:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:58:58,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:58,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 18:58:58,189 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:58:58,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1899913370, now seen corresponding path program 11 times [2024-06-21 18:58:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:58,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567054085] [2024-06-21 18:58:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:00,005 INFO 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 18:59:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567054085] [2024-06-21 18:59:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567054085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:00,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:00,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204270960] [2024-06-21 18:59:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:00,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:00,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 410 transitions, 5152 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:00,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:00,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:00,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:00,864 INFO L124 PetriNetUnfolderBase]: 940/1679 cut-off events. [2024-06-21 18:59:00,865 INFO L125 PetriNetUnfolderBase]: For 315065/315065 co-relation queries the response was YES. [2024-06-21 18:59:00,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14173 conditions, 1679 events. 940/1679 cut-off events. For 315065/315065 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 9759 event pairs, 190 based on Foata normal form. 2/1679 useless extension candidates. Maximal degree in co-relation 13965. Up to 1544 conditions per place. [2024-06-21 18:59:00,887 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 364 selfloop transitions, 58 changer transitions 0/424 dead transitions. [2024-06-21 18:59:00,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 424 transitions, 6100 flow [2024-06-21 18:59:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 18:59:00,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 18:59:00,888 INFO L175 Difference]: Start difference. First operand has 472 places, 410 transitions, 5152 flow. Second operand 12 states and 137 transitions. [2024-06-21 18:59:00,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 424 transitions, 6100 flow [2024-06-21 18:59:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 424 transitions, 5884 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 18:59:02,432 INFO L231 Difference]: Finished difference. Result has 474 places, 412 transitions, 5129 flow [2024-06-21 18:59:02,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5129, PETRI_PLACES=474, PETRI_TRANSITIONS=412} [2024-06-21 18:59:02,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 444 predicate places. [2024-06-21 18:59:02,433 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 412 transitions, 5129 flow [2024-06-21 18:59:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:02,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:02,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 18:59:02,433 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2072649338, now seen corresponding path program 1 times [2024-06-21 18:59:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:02,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029924016] [2024-06-21 18:59:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:04,385 INFO 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 18:59:04,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029924016] [2024-06-21 18:59:04,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029924016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:04,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:04,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:04,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291666129] [2024-06-21 18:59:04,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:04,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 412 transitions, 5129 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:05,191 INFO L124 PetriNetUnfolderBase]: 944/1687 cut-off events. [2024-06-21 18:59:05,191 INFO L125 PetriNetUnfolderBase]: For 319092/319092 co-relation queries the response was YES. [2024-06-21 18:59:05,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14099 conditions, 1687 events. 944/1687 cut-off events. For 319092/319092 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 9850 event pairs, 182 based on Foata normal form. 2/1687 useless extension candidates. Maximal degree in co-relation 13890. Up to 1593 conditions per place. [2024-06-21 18:59:05,215 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 387 selfloop transitions, 37 changer transitions 0/426 dead transitions. [2024-06-21 18:59:05,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 426 transitions, 6030 flow [2024-06-21 18:59:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 18:59:05,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 18:59:05,216 INFO L175 Difference]: Start difference. First operand has 474 places, 412 transitions, 5129 flow. Second operand 11 states and 123 transitions. [2024-06-21 18:59:05,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 426 transitions, 6030 flow [2024-06-21 18:59:06,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 426 transitions, 5859 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 18:59:06,687 INFO L231 Difference]: Finished difference. Result has 475 places, 413 transitions, 5050 flow [2024-06-21 18:59:06,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5050, PETRI_PLACES=475, PETRI_TRANSITIONS=413} [2024-06-21 18:59:06,687 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 445 predicate places. [2024-06-21 18:59:06,688 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 413 transitions, 5050 flow [2024-06-21 18:59:06,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:06,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:06,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:06,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 18:59:06,688 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:06,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2028199846, now seen corresponding path program 16 times [2024-06-21 18:59:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:06,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480312276] [2024-06-21 18:59:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:06,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:08,350 INFO 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 18:59:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480312276] [2024-06-21 18:59:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480312276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:08,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:08,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20366134] [2024-06-21 18:59:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:08,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:08,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 413 transitions, 5050 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:08,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:08,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:08,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:09,124 INFO L124 PetriNetUnfolderBase]: 948/1695 cut-off events. [2024-06-21 18:59:09,124 INFO L125 PetriNetUnfolderBase]: For 322391/322391 co-relation queries the response was YES. [2024-06-21 18:59:09,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14086 conditions, 1695 events. 948/1695 cut-off events. For 322391/322391 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 9878 event pairs, 191 based on Foata normal form. 2/1695 useless extension candidates. Maximal degree in co-relation 13876. Up to 1569 conditions per place. [2024-06-21 18:59:09,144 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 371 selfloop transitions, 53 changer transitions 0/426 dead transitions. [2024-06-21 18:59:09,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 426 transitions, 5962 flow [2024-06-21 18:59:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 18:59:09,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 18:59:09,145 INFO L175 Difference]: Start difference. First operand has 475 places, 413 transitions, 5050 flow. Second operand 12 states and 134 transitions. [2024-06-21 18:59:09,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 426 transitions, 5962 flow [2024-06-21 18:59:10,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 426 transitions, 5827 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 18:59:10,559 INFO L231 Difference]: Finished difference. Result has 475 places, 414 transitions, 5063 flow [2024-06-21 18:59:10,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5063, PETRI_PLACES=475, PETRI_TRANSITIONS=414} [2024-06-21 18:59:10,559 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 445 predicate places. [2024-06-21 18:59:10,559 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 414 transitions, 5063 flow [2024-06-21 18:59:10,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:10,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:10,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 18:59:10,560 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:10,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2028022216, now seen corresponding path program 17 times [2024-06-21 18:59:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:10,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306885152] [2024-06-21 18:59:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:12,247 INFO 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 18:59:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306885152] [2024-06-21 18:59:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306885152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:12,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:12,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20800397] [2024-06-21 18:59:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:12,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:12,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:12,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 414 transitions, 5063 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:12,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:12,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:12,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:13,008 INFO L124 PetriNetUnfolderBase]: 959/1716 cut-off events. [2024-06-21 18:59:13,008 INFO L125 PetriNetUnfolderBase]: For 350457/350457 co-relation queries the response was YES. [2024-06-21 18:59:13,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14628 conditions, 1716 events. 959/1716 cut-off events. For 350457/350457 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 10046 event pairs, 193 based on Foata normal form. 2/1716 useless extension candidates. Maximal degree in co-relation 14417. Up to 1544 conditions per place. [2024-06-21 18:59:13,034 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 365 selfloop transitions, 63 changer transitions 0/430 dead transitions. [2024-06-21 18:59:13,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 430 transitions, 6329 flow [2024-06-21 18:59:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 18:59:13,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 18:59:13,035 INFO L175 Difference]: Start difference. First operand has 475 places, 414 transitions, 5063 flow. Second operand 12 states and 141 transitions. [2024-06-21 18:59:13,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 430 transitions, 6329 flow [2024-06-21 18:59:14,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 430 transitions, 6191 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 18:59:14,849 INFO L231 Difference]: Finished difference. Result has 477 places, 416 transitions, 5133 flow [2024-06-21 18:59:14,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5133, PETRI_PLACES=477, PETRI_TRANSITIONS=416} [2024-06-21 18:59:14,850 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 447 predicate places. [2024-06-21 18:59:14,850 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 416 transitions, 5133 flow [2024-06-21 18:59:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:14,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:14,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 18:59:14,851 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:14,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2023438246, now seen corresponding path program 18 times [2024-06-21 18:59:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186412763] [2024-06-21 18:59:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:16,390 INFO 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 18:59:16,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:16,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186412763] [2024-06-21 18:59:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186412763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:16,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:16,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273666201] [2024-06-21 18:59:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:16,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:16,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:16,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:16,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 416 transitions, 5133 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:16,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:16,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:16,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:17,194 INFO L124 PetriNetUnfolderBase]: 963/1724 cut-off events. [2024-06-21 18:59:17,195 INFO L125 PetriNetUnfolderBase]: For 355547/355547 co-relation queries the response was YES. [2024-06-21 18:59:17,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14721 conditions, 1724 events. 963/1724 cut-off events. For 355547/355547 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 10109 event pairs, 190 based on Foata normal form. 2/1724 useless extension candidates. Maximal degree in co-relation 14509. Up to 1471 conditions per place. [2024-06-21 18:59:17,219 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 354 selfloop transitions, 76 changer transitions 0/432 dead transitions. [2024-06-21 18:59:17,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 432 transitions, 6371 flow [2024-06-21 18:59:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 18:59:17,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 18:59:17,220 INFO L175 Difference]: Start difference. First operand has 477 places, 416 transitions, 5133 flow. Second operand 11 states and 133 transitions. [2024-06-21 18:59:17,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 432 transitions, 6371 flow [2024-06-21 18:59:18,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 432 transitions, 6243 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 18:59:18,732 INFO L231 Difference]: Finished difference. Result has 480 places, 417 transitions, 5203 flow [2024-06-21 18:59:18,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5203, PETRI_PLACES=480, PETRI_TRANSITIONS=417} [2024-06-21 18:59:18,732 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2024-06-21 18:59:18,732 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 417 transitions, 5203 flow [2024-06-21 18:59:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 18:59:18,733 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:18,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2023558216, now seen corresponding path program 19 times [2024-06-21 18:59:18,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:18,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944020865] [2024-06-21 18:59:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:18,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:20,346 INFO 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 18:59:20,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944020865] [2024-06-21 18:59:20,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944020865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:20,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:20,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287043997] [2024-06-21 18:59:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:20,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:20,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:20,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:20,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 417 transitions, 5203 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:20,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:20,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:20,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:21,067 INFO L124 PetriNetUnfolderBase]: 960/1719 cut-off events. [2024-06-21 18:59:21,067 INFO L125 PetriNetUnfolderBase]: For 335837/335837 co-relation queries the response was YES. [2024-06-21 18:59:21,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14448 conditions, 1719 events. 960/1719 cut-off events. For 335837/335837 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 10065 event pairs, 193 based on Foata normal form. 2/1719 useless extension candidates. Maximal degree in co-relation 14234. Up to 1566 conditions per place. [2024-06-21 18:59:21,091 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 360 selfloop transitions, 67 changer transitions 0/429 dead transitions. [2024-06-21 18:59:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 429 transitions, 6085 flow [2024-06-21 18:59:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 18:59:21,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 18:59:21,093 INFO L175 Difference]: Start difference. First operand has 480 places, 417 transitions, 5203 flow. Second operand 12 states and 136 transitions. [2024-06-21 18:59:21,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 429 transitions, 6085 flow [2024-06-21 18:59:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 429 transitions, 5881 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 18:59:22,508 INFO L231 Difference]: Finished difference. Result has 483 places, 417 transitions, 5137 flow [2024-06-21 18:59:22,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5137, PETRI_PLACES=483, PETRI_TRANSITIONS=417} [2024-06-21 18:59:22,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 453 predicate places. [2024-06-21 18:59:22,508 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 417 transitions, 5137 flow [2024-06-21 18:59:22,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:22,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:22,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 18:59:22,509 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:22,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1899740390, now seen corresponding path program 12 times [2024-06-21 18:59:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:22,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850442245] [2024-06-21 18:59:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:24,192 INFO 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 18:59:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850442245] [2024-06-21 18:59:24,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850442245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:24,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494140537] [2024-06-21 18:59:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:24,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:24,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:24,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 417 transitions, 5137 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:24,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:25,021 INFO L124 PetriNetUnfolderBase]: 956/1713 cut-off events. [2024-06-21 18:59:25,021 INFO L125 PetriNetUnfolderBase]: For 315592/315592 co-relation queries the response was YES. [2024-06-21 18:59:25,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13952 conditions, 1713 events. 956/1713 cut-off events. For 315592/315592 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 10044 event pairs, 194 based on Foata normal form. 2/1713 useless extension candidates. Maximal degree in co-relation 13737. Up to 1557 conditions per place. [2024-06-21 18:59:25,047 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 362 selfloop transitions, 66 changer transitions 0/430 dead transitions. [2024-06-21 18:59:25,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 430 transitions, 6039 flow [2024-06-21 18:59:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 18:59:25,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 18:59:25,048 INFO L175 Difference]: Start difference. First operand has 483 places, 417 transitions, 5137 flow. Second operand 12 states and 143 transitions. [2024-06-21 18:59:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 430 transitions, 6039 flow [2024-06-21 18:59:26,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 430 transitions, 5877 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 18:59:26,470 INFO L231 Difference]: Finished difference. Result has 484 places, 417 transitions, 5112 flow [2024-06-21 18:59:26,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5112, PETRI_PLACES=484, PETRI_TRANSITIONS=417} [2024-06-21 18:59:26,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 454 predicate places. [2024-06-21 18:59:26,470 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 417 transitions, 5112 flow [2024-06-21 18:59:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:26,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 18:59:26,471 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:26,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:26,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1899740204, now seen corresponding path program 20 times [2024-06-21 18:59:26,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:26,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57395165] [2024-06-21 18:59:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:26,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:28,207 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 18:59:28,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:28,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57395165] [2024-06-21 18:59:28,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57395165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:28,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:28,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:28,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856727740] [2024-06-21 18:59:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:28,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:28,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:28,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:28,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 417 transitions, 5112 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:28,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:28,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:28,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:28,996 INFO L124 PetriNetUnfolderBase]: 953/1708 cut-off events. [2024-06-21 18:59:28,996 INFO L125 PetriNetUnfolderBase]: For 295076/295076 co-relation queries the response was YES. [2024-06-21 18:59:29,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13595 conditions, 1708 events. 953/1708 cut-off events. For 295076/295076 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 10035 event pairs, 192 based on Foata normal form. 2/1708 useless extension candidates. Maximal degree in co-relation 13379. Up to 1567 conditions per place. [2024-06-21 18:59:29,020 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 367 selfloop transitions, 60 changer transitions 0/429 dead transitions. [2024-06-21 18:59:29,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 429 transitions, 5994 flow [2024-06-21 18:59:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 18:59:29,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 18:59:29,021 INFO L175 Difference]: Start difference. First operand has 484 places, 417 transitions, 5112 flow. Second operand 12 states and 138 transitions. [2024-06-21 18:59:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 429 transitions, 5994 flow [2024-06-21 18:59:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 429 transitions, 5788 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-21 18:59:30,389 INFO L231 Difference]: Finished difference. Result has 485 places, 417 transitions, 5030 flow [2024-06-21 18:59:30,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5030, PETRI_PLACES=485, PETRI_TRANSITIONS=417} [2024-06-21 18:59:30,390 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 455 predicate places. [2024-06-21 18:59:30,390 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 417 transitions, 5030 flow [2024-06-21 18:59:30,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:30,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:30,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:30,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 18:59:30,390 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:30,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1774794430, now seen corresponding path program 21 times [2024-06-21 18:59:30,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:30,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629534845] [2024-06-21 18:59:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:30,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:31,916 INFO 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 18:59:31,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:31,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629534845] [2024-06-21 18:59:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629534845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:31,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:31,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906794378] [2024-06-21 18:59:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:31,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:32,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:32,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 417 transitions, 5030 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:32,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:32,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:32,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:32,655 INFO L124 PetriNetUnfolderBase]: 964/1728 cut-off events. [2024-06-21 18:59:32,655 INFO L125 PetriNetUnfolderBase]: For 323662/323662 co-relation queries the response was YES. [2024-06-21 18:59:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14059 conditions, 1728 events. 964/1728 cut-off events. For 323662/323662 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 10186 event pairs, 189 based on Foata normal form. 2/1728 useless extension candidates. Maximal degree in co-relation 13842. Up to 1524 conditions per place. [2024-06-21 18:59:32,682 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 367 selfloop transitions, 64 changer transitions 0/433 dead transitions. [2024-06-21 18:59:32,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 433 transitions, 6318 flow [2024-06-21 18:59:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 18:59:32,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 18:59:32,683 INFO L175 Difference]: Start difference. First operand has 485 places, 417 transitions, 5030 flow. Second operand 11 states and 126 transitions. [2024-06-21 18:59:32,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 433 transitions, 6318 flow [2024-06-21 18:59:34,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 433 transitions, 6192 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 18:59:34,198 INFO L231 Difference]: Finished difference. Result has 485 places, 419 transitions, 5122 flow [2024-06-21 18:59:34,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5122, PETRI_PLACES=485, PETRI_TRANSITIONS=419} [2024-06-21 18:59:34,198 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 455 predicate places. [2024-06-21 18:59:34,198 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 419 transitions, 5122 flow [2024-06-21 18:59:34,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:34,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:34,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 18:59:34,199 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:34,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash -140616388, now seen corresponding path program 13 times [2024-06-21 18:59:34,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:34,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239614201] [2024-06-21 18:59:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239614201] [2024-06-21 18:59:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239614201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629654814] [2024-06-21 18:59:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:36,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:36,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:36,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 419 transitions, 5122 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:36,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:36,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:36,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:37,073 INFO L124 PetriNetUnfolderBase]: 980/1754 cut-off events. [2024-06-21 18:59:37,074 INFO L125 PetriNetUnfolderBase]: For 355276/355276 co-relation queries the response was YES. [2024-06-21 18:59:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 1754 events. 980/1754 cut-off events. For 355276/355276 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 10324 event pairs, 190 based on Foata normal form. 2/1754 useless extension candidates. Maximal degree in co-relation 14604. Up to 1455 conditions per place. [2024-06-21 18:59:37,108 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 350 selfloop transitions, 86 changer transitions 0/438 dead transitions. [2024-06-21 18:59:37,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 438 transitions, 6544 flow [2024-06-21 18:59:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 18:59:37,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 18:59:37,110 INFO L175 Difference]: Start difference. First operand has 485 places, 419 transitions, 5122 flow. Second operand 12 states and 139 transitions. [2024-06-21 18:59:37,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 438 transitions, 6544 flow [2024-06-21 18:59:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 438 transitions, 6400 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 18:59:38,742 INFO L231 Difference]: Finished difference. Result has 490 places, 423 transitions, 5331 flow [2024-06-21 18:59:38,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4978, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5331, PETRI_PLACES=490, PETRI_TRANSITIONS=423} [2024-06-21 18:59:38,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 460 predicate places. [2024-06-21 18:59:38,743 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 423 transitions, 5331 flow [2024-06-21 18:59:38,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:38,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:38,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:38,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 18:59:38,743 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:38,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash -135974944, now seen corresponding path program 22 times [2024-06-21 18:59:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492181298] [2024-06-21 18:59:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492181298] [2024-06-21 18:59:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492181298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:40,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:40,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:40,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250557224] [2024-06-21 18:59:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:40,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:40,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 423 transitions, 5331 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:40,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:40,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:40,911 INFO L124 PetriNetUnfolderBase]: 984/1762 cut-off events. [2024-06-21 18:59:40,911 INFO L125 PetriNetUnfolderBase]: For 359281/359281 co-relation queries the response was YES. [2024-06-21 18:59:40,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14956 conditions, 1762 events. 984/1762 cut-off events. For 359281/359281 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 10420 event pairs, 196 based on Foata normal form. 2/1762 useless extension candidates. Maximal degree in co-relation 14736. Up to 1683 conditions per place. [2024-06-21 18:59:40,941 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 393 selfloop transitions, 40 changer transitions 0/435 dead transitions. [2024-06-21 18:59:40,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 435 transitions, 6245 flow [2024-06-21 18:59:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 18:59:40,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 18:59:40,943 INFO L175 Difference]: Start difference. First operand has 490 places, 423 transitions, 5331 flow. Second operand 11 states and 121 transitions. [2024-06-21 18:59:40,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 435 transitions, 6245 flow [2024-06-21 18:59:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 435 transitions, 6045 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 18:59:42,646 INFO L231 Difference]: Finished difference. Result has 493 places, 424 transitions, 5241 flow [2024-06-21 18:59:42,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5241, PETRI_PLACES=493, PETRI_TRANSITIONS=424} [2024-06-21 18:59:42,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 463 predicate places. [2024-06-21 18:59:42,647 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 424 transitions, 5241 flow [2024-06-21 18:59:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:42,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:42,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:42,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 18:59:42,647 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:42,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash 199711894, now seen corresponding path program 14 times [2024-06-21 18:59:42,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:42,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566364149] [2024-06-21 18:59:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:42,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:44,407 INFO 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 18:59:44,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566364149] [2024-06-21 18:59:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566364149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:44,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84703919] [2024-06-21 18:59:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:44,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:44,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:44,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 424 transitions, 5241 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:44,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:44,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:44,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:45,325 INFO L124 PetriNetUnfolderBase]: 990/1772 cut-off events. [2024-06-21 18:59:45,325 INFO L125 PetriNetUnfolderBase]: For 361511/361511 co-relation queries the response was YES. [2024-06-21 18:59:45,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14937 conditions, 1772 events. 990/1772 cut-off events. For 361511/361511 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 10473 event pairs, 196 based on Foata normal form. 2/1772 useless extension candidates. Maximal degree in co-relation 14715. Up to 1717 conditions per place. [2024-06-21 18:59:45,352 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 410 selfloop transitions, 27 changer transitions 0/439 dead transitions. [2024-06-21 18:59:45,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 439 transitions, 6537 flow [2024-06-21 18:59:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 18:59:45,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 18:59:45,353 INFO L175 Difference]: Start difference. First operand has 493 places, 424 transitions, 5241 flow. Second operand 12 states and 128 transitions. [2024-06-21 18:59:45,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 439 transitions, 6537 flow [2024-06-21 18:59:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 439 transitions, 6439 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 18:59:47,070 INFO L231 Difference]: Finished difference. Result has 496 places, 426 transitions, 5266 flow [2024-06-21 18:59:47,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5143, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5266, PETRI_PLACES=496, PETRI_TRANSITIONS=426} [2024-06-21 18:59:47,070 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 466 predicate places. [2024-06-21 18:59:47,070 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 426 transitions, 5266 flow [2024-06-21 18:59:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:47,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:47,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:47,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 18:59:47,070 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:47,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2005991258, now seen corresponding path program 23 times [2024-06-21 18:59:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:47,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663786625] [2024-06-21 18:59:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:47,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:48,848 INFO 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 18:59:48,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:48,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663786625] [2024-06-21 18:59:48,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663786625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:48,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:48,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698648629] [2024-06-21 18:59:48,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:48,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:48,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:49,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:49,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 426 transitions, 5266 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:49,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:49,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:49,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:49,731 INFO L124 PetriNetUnfolderBase]: 994/1780 cut-off events. [2024-06-21 18:59:49,732 INFO L125 PetriNetUnfolderBase]: For 365970/365970 co-relation queries the response was YES. [2024-06-21 18:59:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14984 conditions, 1780 events. 994/1780 cut-off events. For 365970/365970 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 10539 event pairs, 195 based on Foata normal form. 2/1780 useless extension candidates. Maximal degree in co-relation 14761. Up to 1641 conditions per place. [2024-06-21 18:59:49,759 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 368 selfloop transitions, 70 changer transitions 0/440 dead transitions. [2024-06-21 18:59:49,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 440 transitions, 6524 flow [2024-06-21 18:59:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 18:59:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 18:59:49,760 INFO L175 Difference]: Start difference. First operand has 496 places, 426 transitions, 5266 flow. Second operand 12 states and 135 transitions. [2024-06-21 18:59:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 440 transitions, 6524 flow [2024-06-21 18:59:51,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 440 transitions, 6298 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-06-21 18:59:51,522 INFO L231 Difference]: Finished difference. Result has 495 places, 427 transitions, 5212 flow [2024-06-21 18:59:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5212, PETRI_PLACES=495, PETRI_TRANSITIONS=427} [2024-06-21 18:59:51,522 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 465 predicate places. [2024-06-21 18:59:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 427 transitions, 5212 flow [2024-06-21 18:59:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:51,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:51,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 18:59:51,523 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -409122924, now seen corresponding path program 2 times [2024-06-21 18:59:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420029908] [2024-06-21 18:59:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:53,308 INFO 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 18:59:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:53,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420029908] [2024-06-21 18:59:53,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420029908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:53,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:53,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:59:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494018999] [2024-06-21 18:59:53,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:53,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:59:53,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:59:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:59:53,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:53,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 427 transitions, 5212 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:53,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:53,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:53,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:54,122 INFO L124 PetriNetUnfolderBase]: 998/1788 cut-off events. [2024-06-21 18:59:54,122 INFO L125 PetriNetUnfolderBase]: For 369611/369611 co-relation queries the response was YES. [2024-06-21 18:59:54,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14923 conditions, 1788 events. 998/1788 cut-off events. For 369611/369611 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 10609 event pairs, 198 based on Foata normal form. 2/1788 useless extension candidates. Maximal degree in co-relation 14701. Up to 1743 conditions per place. [2024-06-21 18:59:54,150 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 415 selfloop transitions, 22 changer transitions 0/439 dead transitions. [2024-06-21 18:59:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 439 transitions, 6124 flow [2024-06-21 18:59:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:59:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:59:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 18:59:54,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 18:59:54,151 INFO L175 Difference]: Start difference. First operand has 495 places, 427 transitions, 5212 flow. Second operand 11 states and 117 transitions. [2024-06-21 18:59:54,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 439 transitions, 6124 flow [2024-06-21 18:59:55,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 439 transitions, 5964 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 18:59:55,793 INFO L231 Difference]: Finished difference. Result has 496 places, 428 transitions, 5117 flow [2024-06-21 18:59:55,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5117, PETRI_PLACES=496, PETRI_TRANSITIONS=428} [2024-06-21 18:59:55,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 466 predicate places. [2024-06-21 18:59:55,793 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 428 transitions, 5117 flow [2024-06-21 18:59:55,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:55,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:55,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:55,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 18:59:55,794 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 18:59:55,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1828622402, now seen corresponding path program 15 times [2024-06-21 18:59:55,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:55,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223320788] [2024-06-21 18:59:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223320788] [2024-06-21 18:59:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223320788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 18:59:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135601960] [2024-06-21 18:59:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 18:59:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 18:59:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 18:59:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 18:59:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 428 transitions, 5117 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 18:59:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 18:59:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:58,599 INFO L124 PetriNetUnfolderBase]: 1004/1798 cut-off events. [2024-06-21 18:59:58,599 INFO L125 PetriNetUnfolderBase]: For 374490/374490 co-relation queries the response was YES. [2024-06-21 18:59:58,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14945 conditions, 1798 events. 1004/1798 cut-off events. For 374490/374490 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 10695 event pairs, 196 based on Foata normal form. 2/1798 useless extension candidates. Maximal degree in co-relation 14722. Up to 1679 conditions per place. [2024-06-21 18:59:58,623 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 391 selfloop transitions, 50 changer transitions 0/443 dead transitions. [2024-06-21 18:59:58,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 443 transitions, 6115 flow [2024-06-21 18:59:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:59:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:59:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 18:59:58,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 18:59:58,624 INFO L175 Difference]: Start difference. First operand has 496 places, 428 transitions, 5117 flow. Second operand 12 states and 134 transitions. [2024-06-21 18:59:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 443 transitions, 6115 flow [2024-06-21 19:00:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 443 transitions, 6046 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:00,296 INFO L231 Difference]: Finished difference. Result has 498 places, 430 transitions, 5221 flow [2024-06-21 19:00:00,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5221, PETRI_PLACES=498, PETRI_TRANSITIONS=430} [2024-06-21 19:00:00,297 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 468 predicate places. [2024-06-21 19:00:00,297 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 430 transitions, 5221 flow [2024-06-21 19:00:00,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:00,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:00,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:00,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 19:00:00,298 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:00,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash 838137186, now seen corresponding path program 16 times [2024-06-21 19:00:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:00,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261474771] [2024-06-21 19:00:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:00,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:02,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:02,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261474771] [2024-06-21 19:00:02,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261474771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:02,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:02,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481295835] [2024-06-21 19:00:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:02,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:02,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:02,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:02,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 430 transitions, 5221 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:02,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:02,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:02,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:03,361 INFO L124 PetriNetUnfolderBase]: 1010/1808 cut-off events. [2024-06-21 19:00:03,361 INFO L125 PetriNetUnfolderBase]: For 379964/379964 co-relation queries the response was YES. [2024-06-21 19:00:03,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15157 conditions, 1808 events. 1010/1808 cut-off events. For 379964/379964 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 10754 event pairs, 198 based on Foata normal form. 2/1808 useless extension candidates. Maximal degree in co-relation 14933. Up to 1694 conditions per place. [2024-06-21 19:00:03,387 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 406 selfloop transitions, 39 changer transitions 0/447 dead transitions. [2024-06-21 19:00:03,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 447 transitions, 6251 flow [2024-06-21 19:00:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 19:00:03,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 19:00:03,388 INFO L175 Difference]: Start difference. First operand has 498 places, 430 transitions, 5221 flow. Second operand 12 states and 134 transitions. [2024-06-21 19:00:03,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 447 transitions, 6251 flow [2024-06-21 19:00:05,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 447 transitions, 6100 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:05,155 INFO L231 Difference]: Finished difference. Result has 500 places, 432 transitions, 5225 flow [2024-06-21 19:00:05,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5225, PETRI_PLACES=500, PETRI_TRANSITIONS=432} [2024-06-21 19:00:05,156 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 470 predicate places. [2024-06-21 19:00:05,156 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 432 transitions, 5225 flow [2024-06-21 19:00:05,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:05,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:05,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:05,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 19:00:05,156 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:05,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash -140621224, now seen corresponding path program 24 times [2024-06-21 19:00:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:05,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357463191] [2024-06-21 19:00:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:06,821 INFO 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 19:00:06,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357463191] [2024-06-21 19:00:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357463191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:06,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:06,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:06,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74247901] [2024-06-21 19:00:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:06,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:06,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:06,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:06,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:06,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 432 transitions, 5225 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:06,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:06,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:06,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:07,629 INFO L124 PetriNetUnfolderBase]: 1014/1816 cut-off events. [2024-06-21 19:00:07,629 INFO L125 PetriNetUnfolderBase]: For 383970/383970 co-relation queries the response was YES. [2024-06-21 19:00:07,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 1816 events. 1014/1816 cut-off events. For 383970/383970 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 10834 event pairs, 201 based on Foata normal form. 2/1816 useless extension candidates. Maximal degree in co-relation 14934. Up to 1681 conditions per place. [2024-06-21 19:00:07,658 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 379 selfloop transitions, 64 changer transitions 0/445 dead transitions. [2024-06-21 19:00:07,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 445 transitions, 6165 flow [2024-06-21 19:00:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:00:07,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:00:07,659 INFO L175 Difference]: Start difference. First operand has 500 places, 432 transitions, 5225 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:00:07,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 445 transitions, 6165 flow [2024-06-21 19:00:09,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 445 transitions, 6032 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:09,371 INFO L231 Difference]: Finished difference. Result has 502 places, 433 transitions, 5254 flow [2024-06-21 19:00:09,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5092, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5254, PETRI_PLACES=502, PETRI_TRANSITIONS=433} [2024-06-21 19:00:09,371 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 472 predicate places. [2024-06-21 19:00:09,371 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 433 transitions, 5254 flow [2024-06-21 19:00:09,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:09,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:09,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 19:00:09,372 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:09,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash 118220622, now seen corresponding path program 17 times [2024-06-21 19:00:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:09,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322091545] [2024-06-21 19:00:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:10,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:10,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322091545] [2024-06-21 19:00:10,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322091545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:10,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:10,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574843288] [2024-06-21 19:00:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:11,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:11,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 433 transitions, 5254 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:11,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:11,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:11,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:11,888 INFO L124 PetriNetUnfolderBase]: 1013/1815 cut-off events. [2024-06-21 19:00:11,888 INFO L125 PetriNetUnfolderBase]: For 375044/375044 co-relation queries the response was YES. [2024-06-21 19:00:11,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14835 conditions, 1815 events. 1013/1815 cut-off events. For 375044/375044 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 10819 event pairs, 201 based on Foata normal form. 3/1816 useless extension candidates. Maximal degree in co-relation 14609. Up to 1766 conditions per place. [2024-06-21 19:00:11,916 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 417 selfloop transitions, 28 changer transitions 0/447 dead transitions. [2024-06-21 19:00:11,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 447 transitions, 6250 flow [2024-06-21 19:00:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 19:00:11,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 19:00:11,917 INFO L175 Difference]: Start difference. First operand has 502 places, 433 transitions, 5254 flow. Second operand 12 states and 127 transitions. [2024-06-21 19:00:11,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 447 transitions, 6250 flow [2024-06-21 19:00:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 447 transitions, 6070 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:13,609 INFO L231 Difference]: Finished difference. Result has 504 places, 435 transitions, 5214 flow [2024-06-21 19:00:13,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5214, PETRI_PLACES=504, PETRI_TRANSITIONS=435} [2024-06-21 19:00:13,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 474 predicate places. [2024-06-21 19:00:13,610 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 435 transitions, 5214 flow [2024-06-21 19:00:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 19:00:13,610 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:13,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2001349442, now seen corresponding path program 18 times [2024-06-21 19:00:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739899774] [2024-06-21 19:00:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:15,172 INFO 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 19:00:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739899774] [2024-06-21 19:00:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739899774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:15,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103314144] [2024-06-21 19:00:15,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:15,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:15,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:15,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:15,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 435 transitions, 5214 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:15,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:15,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:15,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:15,984 INFO L124 PetriNetUnfolderBase]: 1019/1825 cut-off events. [2024-06-21 19:00:15,984 INFO L125 PetriNetUnfolderBase]: For 366127/366127 co-relation queries the response was YES. [2024-06-21 19:00:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14851 conditions, 1825 events. 1019/1825 cut-off events. For 366127/366127 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 10930 event pairs, 203 based on Foata normal form. 2/1825 useless extension candidates. Maximal degree in co-relation 14624. Up to 1728 conditions per place. [2024-06-21 19:00:16,012 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 395 selfloop transitions, 53 changer transitions 0/450 dead transitions. [2024-06-21 19:00:16,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 450 transitions, 6268 flow [2024-06-21 19:00:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:00:16,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:00:16,013 INFO L175 Difference]: Start difference. First operand has 504 places, 435 transitions, 5214 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:00:16,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 450 transitions, 6268 flow [2024-06-21 19:00:17,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 450 transitions, 6115 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 19:00:17,555 INFO L231 Difference]: Finished difference. Result has 508 places, 439 transitions, 5317 flow [2024-06-21 19:00:17,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5317, PETRI_PLACES=508, PETRI_TRANSITIONS=439} [2024-06-21 19:00:17,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 478 predicate places. [2024-06-21 19:00:17,555 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 439 transitions, 5317 flow [2024-06-21 19:00:17,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:17,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 19:00:17,556 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:17,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -417175422, now seen corresponding path program 19 times [2024-06-21 19:00:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418784617] [2024-06-21 19:00:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:19,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:19,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418784617] [2024-06-21 19:00:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418784617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:19,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:19,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542409125] [2024-06-21 19:00:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:19,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:19,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 439 transitions, 5317 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:19,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:19,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:19,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:20,158 INFO L124 PetriNetUnfolderBase]: 1025/1835 cut-off events. [2024-06-21 19:00:20,158 INFO L125 PetriNetUnfolderBase]: For 375230/375230 co-relation queries the response was YES. [2024-06-21 19:00:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15107 conditions, 1835 events. 1025/1835 cut-off events. For 375230/375230 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 10970 event pairs, 199 based on Foata normal form. 2/1835 useless extension candidates. Maximal degree in co-relation 14878. Up to 1770 conditions per place. [2024-06-21 19:00:20,187 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 425 selfloop transitions, 27 changer transitions 0/454 dead transitions. [2024-06-21 19:00:20,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 454 transitions, 6359 flow [2024-06-21 19:00:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:00:20,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:00:20,188 INFO L175 Difference]: Start difference. First operand has 508 places, 439 transitions, 5317 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:00:20,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 454 transitions, 6359 flow [2024-06-21 19:00:22,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 454 transitions, 6155 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-21 19:00:22,104 INFO L231 Difference]: Finished difference. Result has 511 places, 441 transitions, 5262 flow [2024-06-21 19:00:22,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5262, PETRI_PLACES=511, PETRI_TRANSITIONS=441} [2024-06-21 19:00:22,105 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 481 predicate places. [2024-06-21 19:00:22,105 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 441 transitions, 5262 flow [2024-06-21 19:00:22,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:22,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:22,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:22,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 19:00:22,106 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:22,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash 868703700, now seen corresponding path program 3 times [2024-06-21 19:00:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936444301] [2024-06-21 19:00:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:24,075 INFO 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 19:00:24,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936444301] [2024-06-21 19:00:24,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936444301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:24,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:24,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:24,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530210047] [2024-06-21 19:00:24,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:24,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:24,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:24,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 441 transitions, 5262 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:24,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:24,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:24,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:24,955 INFO L124 PetriNetUnfolderBase]: 1029/1843 cut-off events. [2024-06-21 19:00:24,956 INFO L125 PetriNetUnfolderBase]: For 378483/378483 co-relation queries the response was YES. [2024-06-21 19:00:24,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14984 conditions, 1843 events. 1029/1843 cut-off events. For 378483/378483 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 11029 event pairs, 193 based on Foata normal form. 2/1843 useless extension candidates. Maximal degree in co-relation 14754. Up to 1770 conditions per place. [2024-06-21 19:00:24,984 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 422 selfloop transitions, 30 changer transitions 0/454 dead transitions. [2024-06-21 19:00:24,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 454 transitions, 6224 flow [2024-06-21 19:00:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:00:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:00:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:00:24,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:00:24,985 INFO L175 Difference]: Start difference. First operand has 511 places, 441 transitions, 5262 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:00:24,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 454 transitions, 6224 flow [2024-06-21 19:00:26,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 454 transitions, 6103 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:26,861 INFO L231 Difference]: Finished difference. Result has 512 places, 442 transitions, 5223 flow [2024-06-21 19:00:26,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5223, PETRI_PLACES=512, PETRI_TRANSITIONS=442} [2024-06-21 19:00:26,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 482 predicate places. [2024-06-21 19:00:26,862 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 442 transitions, 5223 flow [2024-06-21 19:00:26,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:26,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:26,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:26,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 19:00:26,862 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:26,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash -639057798, now seen corresponding path program 25 times [2024-06-21 19:00:26,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:26,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774237954] [2024-06-21 19:00:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:26,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:28,459 INFO 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 19:00:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774237954] [2024-06-21 19:00:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774237954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:28,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:28,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764206549] [2024-06-21 19:00:28,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:28,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:28,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:28,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 442 transitions, 5223 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:28,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:28,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:28,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:29,333 INFO L124 PetriNetUnfolderBase]: 1033/1851 cut-off events. [2024-06-21 19:00:29,333 INFO L125 PetriNetUnfolderBase]: For 382081/382081 co-relation queries the response was YES. [2024-06-21 19:00:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14985 conditions, 1851 events. 1033/1851 cut-off events. For 382081/382081 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 11095 event pairs, 203 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 14754. Up to 1799 conditions per place. [2024-06-21 19:00:29,362 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 426 selfloop transitions, 26 changer transitions 0/454 dead transitions. [2024-06-21 19:00:29,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 454 transitions, 6181 flow [2024-06-21 19:00:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 19:00:29,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 19:00:29,363 INFO L175 Difference]: Start difference. First operand has 512 places, 442 transitions, 5223 flow. Second operand 12 states and 125 transitions. [2024-06-21 19:00:29,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 454 transitions, 6181 flow [2024-06-21 19:00:31,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 454 transitions, 6070 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 19:00:31,458 INFO L231 Difference]: Finished difference. Result has 512 places, 443 transitions, 5200 flow [2024-06-21 19:00:31,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5112, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5200, PETRI_PLACES=512, PETRI_TRANSITIONS=443} [2024-06-21 19:00:31,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 482 predicate places. [2024-06-21 19:00:31,458 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 443 transitions, 5200 flow [2024-06-21 19:00:31,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:31,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:31,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 19:00:31,459 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:31,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash 36515132, now seen corresponding path program 20 times [2024-06-21 19:00:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:31,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668993919] [2024-06-21 19:00:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:31,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:33,314 INFO 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 19:00:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668993919] [2024-06-21 19:00:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668993919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:33,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:33,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010734430] [2024-06-21 19:00:33,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:33,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:33,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:33,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 443 transitions, 5200 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:33,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:33,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:33,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:34,263 INFO L124 PetriNetUnfolderBase]: 1039/1861 cut-off events. [2024-06-21 19:00:34,263 INFO L125 PetriNetUnfolderBase]: For 387380/387380 co-relation queries the response was YES. [2024-06-21 19:00:34,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15116 conditions, 1861 events. 1039/1861 cut-off events. For 387380/387380 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 11139 event pairs, 203 based on Foata normal form. 2/1861 useless extension candidates. Maximal degree in co-relation 14884. Up to 1773 conditions per place. [2024-06-21 19:00:34,294 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 411 selfloop transitions, 43 changer transitions 0/456 dead transitions. [2024-06-21 19:00:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 456 transitions, 6224 flow [2024-06-21 19:00:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:00:34,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:00:34,295 INFO L175 Difference]: Start difference. First operand has 512 places, 443 transitions, 5200 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:00:34,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 456 transitions, 6224 flow [2024-06-21 19:00:36,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 456 transitions, 6148 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:36,193 INFO L231 Difference]: Finished difference. Result has 514 places, 445 transitions, 5303 flow [2024-06-21 19:00:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5303, PETRI_PLACES=514, PETRI_TRANSITIONS=445} [2024-06-21 19:00:36,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 484 predicate places. [2024-06-21 19:00:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 445 transitions, 5303 flow [2024-06-21 19:00:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:36,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:36,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 19:00:36,194 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:36,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash 862201326, now seen corresponding path program 26 times [2024-06-21 19:00:36,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:36,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415950950] [2024-06-21 19:00:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:37,677 INFO 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 19:00:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415950950] [2024-06-21 19:00:37,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415950950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:37,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:37,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:37,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453176198] [2024-06-21 19:00:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:37,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:37,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 445 transitions, 5303 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:37,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:37,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:37,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:38,487 INFO L124 PetriNetUnfolderBase]: 1043/1869 cut-off events. [2024-06-21 19:00:38,487 INFO L125 PetriNetUnfolderBase]: For 392477/392477 co-relation queries the response was YES. [2024-06-21 19:00:38,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 1869 events. 1043/1869 cut-off events. For 392477/392477 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 11227 event pairs, 203 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 14983. Up to 1790 conditions per place. [2024-06-21 19:00:38,512 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 418 selfloop transitions, 37 changer transitions 0/457 dead transitions. [2024-06-21 19:00:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 457 transitions, 6269 flow [2024-06-21 19:00:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:00:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:00:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:00:38,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:00:38,513 INFO L175 Difference]: Start difference. First operand has 514 places, 445 transitions, 5303 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:00:38,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 457 transitions, 6269 flow [2024-06-21 19:00:40,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 457 transitions, 6112 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:40,513 INFO L231 Difference]: Finished difference. Result has 515 places, 446 transitions, 5258 flow [2024-06-21 19:00:40,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5258, PETRI_PLACES=515, PETRI_TRANSITIONS=446} [2024-06-21 19:00:40,514 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 485 predicate places. [2024-06-21 19:00:40,514 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 446 transitions, 5258 flow [2024-06-21 19:00:40,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:40,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:40,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 19:00:40,514 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:40,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 838130676, now seen corresponding path program 21 times [2024-06-21 19:00:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:40,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989067537] [2024-06-21 19:00:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:40,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:42,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:42,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989067537] [2024-06-21 19:00:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989067537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601695474] [2024-06-21 19:00:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:42,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:42,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 446 transitions, 5258 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:42,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:42,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:42,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:43,264 INFO L124 PetriNetUnfolderBase]: 1049/1879 cut-off events. [2024-06-21 19:00:43,264 INFO L125 PetriNetUnfolderBase]: For 396617/396617 co-relation queries the response was YES. [2024-06-21 19:00:43,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 1879 events. 1049/1879 cut-off events. For 396617/396617 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11262 event pairs, 204 based on Foata normal form. 2/1879 useless extension candidates. Maximal degree in co-relation 15049. Up to 1818 conditions per place. [2024-06-21 19:00:43,294 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 426 selfloop transitions, 31 changer transitions 0/459 dead transitions. [2024-06-21 19:00:43,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 459 transitions, 6292 flow [2024-06-21 19:00:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:00:43,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:00:43,297 INFO L175 Difference]: Start difference. First operand has 515 places, 446 transitions, 5258 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:00:43,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 459 transitions, 6292 flow [2024-06-21 19:00:45,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 459 transitions, 6192 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:00:45,457 INFO L231 Difference]: Finished difference. Result has 518 places, 448 transitions, 5317 flow [2024-06-21 19:00:45,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5317, PETRI_PLACES=518, PETRI_TRANSITIONS=448} [2024-06-21 19:00:45,458 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 488 predicate places. [2024-06-21 19:00:45,458 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 448 transitions, 5317 flow [2024-06-21 19:00:45,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:45,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:45,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:45,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 19:00:45,458 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:45,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -336409128, now seen corresponding path program 4 times [2024-06-21 19:00:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865728785] [2024-06-21 19:00:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:47,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:47,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865728785] [2024-06-21 19:00:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865728785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:47,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:47,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144809021] [2024-06-21 19:00:47,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:47,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:47,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:47,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 448 transitions, 5317 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:47,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:47,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:47,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:47,951 INFO L124 PetriNetUnfolderBase]: 1053/1887 cut-off events. [2024-06-21 19:00:47,951 INFO L125 PetriNetUnfolderBase]: For 401178/401178 co-relation queries the response was YES. [2024-06-21 19:00:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15305 conditions, 1887 events. 1053/1887 cut-off events. For 401178/401178 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 11332 event pairs, 207 based on Foata normal form. 2/1887 useless extension candidates. Maximal degree in co-relation 15070. Up to 1845 conditions per place. [2024-06-21 19:00:47,982 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 441 selfloop transitions, 17 changer transitions 0/460 dead transitions. [2024-06-21 19:00:47,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 460 transitions, 6275 flow [2024-06-21 19:00:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:00:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:00:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 19:00:47,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 19:00:47,983 INFO L175 Difference]: Start difference. First operand has 518 places, 448 transitions, 5317 flow. Second operand 11 states and 112 transitions. [2024-06-21 19:00:47,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 460 transitions, 6275 flow [2024-06-21 19:00:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 460 transitions, 6138 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-21 19:00:50,082 INFO L231 Difference]: Finished difference. Result has 519 places, 449 transitions, 5238 flow [2024-06-21 19:00:50,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5238, PETRI_PLACES=519, PETRI_TRANSITIONS=449} [2024-06-21 19:00:50,082 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 489 predicate places. [2024-06-21 19:00:50,082 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 449 transitions, 5238 flow [2024-06-21 19:00:50,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:50,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:50,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:50,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 19:00:50,083 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:50,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash 6434264, now seen corresponding path program 5 times [2024-06-21 19:00:50,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:50,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126153092] [2024-06-21 19:00:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:50,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:52,065 INFO 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 19:00:52,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:52,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126153092] [2024-06-21 19:00:52,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126153092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:52,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:52,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:00:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442613799] [2024-06-21 19:00:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:00:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:00:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:00:52,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:52,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 449 transitions, 5238 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:52,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:52,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:52,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:53,041 INFO L124 PetriNetUnfolderBase]: 1057/1895 cut-off events. [2024-06-21 19:00:53,041 INFO L125 PetriNetUnfolderBase]: For 404342/404342 co-relation queries the response was YES. [2024-06-21 19:00:53,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15240 conditions, 1895 events. 1057/1895 cut-off events. For 404342/404342 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 11389 event pairs, 203 based on Foata normal form. 2/1895 useless extension candidates. Maximal degree in co-relation 15004. Up to 1837 conditions per place. [2024-06-21 19:00:53,075 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 435 selfloop transitions, 25 changer transitions 0/462 dead transitions. [2024-06-21 19:00:53,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 462 transitions, 6220 flow [2024-06-21 19:00:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:00:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:00:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:00:53,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:00:53,076 INFO L175 Difference]: Start difference. First operand has 519 places, 449 transitions, 5238 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:00:53,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 462 transitions, 6220 flow [2024-06-21 19:00:54,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 462 transitions, 6172 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:00:54,919 INFO L231 Difference]: Finished difference. Result has 521 places, 450 transitions, 5266 flow [2024-06-21 19:00:54,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5266, PETRI_PLACES=521, PETRI_TRANSITIONS=450} [2024-06-21 19:00:54,920 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 491 predicate places. [2024-06-21 19:00:54,920 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 450 transitions, 5266 flow [2024-06-21 19:00:54,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:54,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:54,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:54,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 19:00:54,920 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:54,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 30259022, now seen corresponding path program 22 times [2024-06-21 19:00:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:54,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635716237] [2024-06-21 19:00:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:56,811 INFO 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 19:00:56,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:56,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635716237] [2024-06-21 19:00:56,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635716237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:56,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:56,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:00:56,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858344260] [2024-06-21 19:00:56,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:56,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:00:56,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:00:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:00:56,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:00:56,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 450 transitions, 5266 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:56,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:56,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:00:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:57,784 INFO L124 PetriNetUnfolderBase]: 1063/1905 cut-off events. [2024-06-21 19:00:57,784 INFO L125 PetriNetUnfolderBase]: For 410188/410188 co-relation queries the response was YES. [2024-06-21 19:00:57,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15435 conditions, 1905 events. 1063/1905 cut-off events. For 410188/410188 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 11485 event pairs, 207 based on Foata normal form. 2/1905 useless extension candidates. Maximal degree in co-relation 15198. Up to 1817 conditions per place. [2024-06-21 19:00:57,811 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 419 selfloop transitions, 42 changer transitions 0/463 dead transitions. [2024-06-21 19:00:57,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 463 transitions, 6312 flow [2024-06-21 19:00:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:00:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:00:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 19:00:57,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:00:57,812 INFO L175 Difference]: Start difference. First operand has 521 places, 450 transitions, 5266 flow. Second operand 12 states and 132 transitions. [2024-06-21 19:00:57,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 463 transitions, 6312 flow [2024-06-21 19:00:59,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 463 transitions, 6226 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 19:00:59,688 INFO L231 Difference]: Finished difference. Result has 522 places, 452 transitions, 5365 flow [2024-06-21 19:00:59,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5365, PETRI_PLACES=522, PETRI_TRANSITIONS=452} [2024-06-21 19:00:59,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2024-06-21 19:00:59,689 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 452 transitions, 5365 flow [2024-06-21 19:00:59,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:00:59,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:59,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 19:00:59,690 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:00:59,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash -245740, now seen corresponding path program 27 times [2024-06-21 19:00:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428874865] [2024-06-21 19:00:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:01,404 INFO 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 19:01:01,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428874865] [2024-06-21 19:01:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428874865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:01,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:01,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557829089] [2024-06-21 19:01:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:01,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:01,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 452 transitions, 5365 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:01,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:01,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:02,278 INFO L124 PetriNetUnfolderBase]: 1074/1926 cut-off events. [2024-06-21 19:01:02,278 INFO L125 PetriNetUnfolderBase]: For 447308/447308 co-relation queries the response was YES. [2024-06-21 19:01:02,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16015 conditions, 1926 events. 1074/1926 cut-off events. For 447308/447308 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 11649 event pairs, 210 based on Foata normal form. 2/1926 useless extension candidates. Maximal degree in co-relation 15777. Up to 1835 conditions per place. [2024-06-21 19:01:02,310 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 429 selfloop transitions, 36 changer transitions 0/467 dead transitions. [2024-06-21 19:01:02,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 467 transitions, 6745 flow [2024-06-21 19:01:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 19:01:02,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 19:01:02,311 INFO L175 Difference]: Start difference. First operand has 522 places, 452 transitions, 5365 flow. Second operand 12 states and 127 transitions. [2024-06-21 19:01:02,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 467 transitions, 6745 flow [2024-06-21 19:01:04,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 467 transitions, 6582 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-21 19:01:04,740 INFO L231 Difference]: Finished difference. Result has 524 places, 454 transitions, 5348 flow [2024-06-21 19:01:04,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5348, PETRI_PLACES=524, PETRI_TRANSITIONS=454} [2024-06-21 19:01:04,740 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 494 predicate places. [2024-06-21 19:01:04,740 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 454 transitions, 5348 flow [2024-06-21 19:01:04,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:04,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:04,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 19:01:04,741 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:04,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 6425336, now seen corresponding path program 23 times [2024-06-21 19:01:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548817426] [2024-06-21 19:01:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:04,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:06,593 INFO 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 19:01:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548817426] [2024-06-21 19:01:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548817426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:06,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:06,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:06,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117996961] [2024-06-21 19:01:06,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:06,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:06,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:06,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 454 transitions, 5348 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:06,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:06,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:06,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:07,785 INFO L124 PetriNetUnfolderBase]: 1080/1936 cut-off events. [2024-06-21 19:01:07,785 INFO L125 PetriNetUnfolderBase]: For 452285/452285 co-relation queries the response was YES. [2024-06-21 19:01:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16092 conditions, 1936 events. 1080/1936 cut-off events. For 452285/452285 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 11721 event pairs, 204 based on Foata normal form. 2/1936 useless extension candidates. Maximal degree in co-relation 15853. Up to 1822 conditions per place. [2024-06-21 19:01:07,811 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 428 selfloop transitions, 40 changer transitions 0/470 dead transitions. [2024-06-21 19:01:07,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 470 transitions, 6442 flow [2024-06-21 19:01:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 19:01:07,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:01:07,812 INFO L175 Difference]: Start difference. First operand has 524 places, 454 transitions, 5348 flow. Second operand 12 states and 132 transitions. [2024-06-21 19:01:07,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 470 transitions, 6442 flow [2024-06-21 19:01:09,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 470 transitions, 6367 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:01:09,938 INFO L231 Difference]: Finished difference. Result has 528 places, 456 transitions, 5458 flow [2024-06-21 19:01:09,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5458, PETRI_PLACES=528, PETRI_TRANSITIONS=456} [2024-06-21 19:01:09,938 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 498 predicate places. [2024-06-21 19:01:09,939 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 456 transitions, 5458 flow [2024-06-21 19:01:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:09,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:09,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:09,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 19:01:09,939 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:09,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:09,940 INFO L85 PathProgramCache]: Analyzing trace with hash -240904, now seen corresponding path program 24 times [2024-06-21 19:01:09,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822176775] [2024-06-21 19:01:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:11,662 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 19:01:11,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822176775] [2024-06-21 19:01:11,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822176775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:11,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:11,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:11,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823927986] [2024-06-21 19:01:11,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:11,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:11,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:11,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:11,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 456 transitions, 5458 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:11,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:11,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:11,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:12,636 INFO L124 PetriNetUnfolderBase]: 1096/1962 cut-off events. [2024-06-21 19:01:12,636 INFO L125 PetriNetUnfolderBase]: For 492542/492542 co-relation queries the response was YES. [2024-06-21 19:01:12,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16957 conditions, 1962 events. 1096/1962 cut-off events. For 492542/492542 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 11905 event pairs, 215 based on Foata normal form. 2/1962 useless extension candidates. Maximal degree in co-relation 16716. Up to 1850 conditions per place. [2024-06-21 19:01:12,669 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 419 selfloop transitions, 52 changer transitions 0/473 dead transitions. [2024-06-21 19:01:12,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 473 transitions, 7002 flow [2024-06-21 19:01:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:01:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:01:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:01:12,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:01:12,670 INFO L175 Difference]: Start difference. First operand has 528 places, 456 transitions, 5458 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:01:12,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 473 transitions, 7002 flow [2024-06-21 19:01:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 473 transitions, 6839 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-21 19:01:15,104 INFO L231 Difference]: Finished difference. Result has 529 places, 460 transitions, 5608 flow [2024-06-21 19:01:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5608, PETRI_PLACES=529, PETRI_TRANSITIONS=460} [2024-06-21 19:01:15,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 499 predicate places. [2024-06-21 19:01:15,104 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 460 transitions, 5608 flow [2024-06-21 19:01:15,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:15,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:15,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 19:01:15,105 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:15,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash -645486888, now seen corresponding path program 28 times [2024-06-21 19:01:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:15,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574130267] [2024-06-21 19:01:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:16,745 INFO 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 19:01:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:16,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574130267] [2024-06-21 19:01:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574130267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:16,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:16,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:16,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971129613] [2024-06-21 19:01:16,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:16,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:16,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 460 transitions, 5608 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:16,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:16,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:16,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:17,753 INFO L124 PetriNetUnfolderBase]: 1100/1970 cut-off events. [2024-06-21 19:01:17,753 INFO L125 PetriNetUnfolderBase]: For 497427/497427 co-relation queries the response was YES. [2024-06-21 19:01:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16972 conditions, 1970 events. 1100/1970 cut-off events. For 497427/497427 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 11971 event pairs, 215 based on Foata normal form. 2/1970 useless extension candidates. Maximal degree in co-relation 16730. Up to 1891 conditions per place. [2024-06-21 19:01:17,785 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 430 selfloop transitions, 41 changer transitions 0/473 dead transitions. [2024-06-21 19:01:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 473 transitions, 6620 flow [2024-06-21 19:01:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 19:01:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 19:01:17,787 INFO L175 Difference]: Start difference. First operand has 529 places, 460 transitions, 5608 flow. Second operand 12 states and 130 transitions. [2024-06-21 19:01:17,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 473 transitions, 6620 flow [2024-06-21 19:01:20,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 473 transitions, 6479 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:20,296 INFO L231 Difference]: Finished difference. Result has 534 places, 461 transitions, 5591 flow [2024-06-21 19:01:20,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5591, PETRI_PLACES=534, PETRI_TRANSITIONS=461} [2024-06-21 19:01:20,296 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 504 predicate places. [2024-06-21 19:01:20,296 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 461 transitions, 5591 flow [2024-06-21 19:01:20,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:20,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:20,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:20,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 19:01:20,297 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:20,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash 110185980, now seen corresponding path program 6 times [2024-06-21 19:01:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:20,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706636943] [2024-06-21 19:01:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:20,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:22,586 INFO 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 19:01:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706636943] [2024-06-21 19:01:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706636943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:22,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:22,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:22,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256062129] [2024-06-21 19:01:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:22,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:22,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:22,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:22,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 461 transitions, 5591 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:22,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:22,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:22,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:23,492 INFO L124 PetriNetUnfolderBase]: 1104/1978 cut-off events. [2024-06-21 19:01:23,492 INFO L125 PetriNetUnfolderBase]: For 500755/500755 co-relation queries the response was YES. [2024-06-21 19:01:23,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16973 conditions, 1978 events. 1104/1978 cut-off events. For 500755/500755 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 12041 event pairs, 215 based on Foata normal form. 2/1978 useless extension candidates. Maximal degree in co-relation 16729. Up to 1932 conditions per place. [2024-06-21 19:01:23,526 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 450 selfloop transitions, 21 changer transitions 0/473 dead transitions. [2024-06-21 19:01:23,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 473 transitions, 6587 flow [2024-06-21 19:01:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:01:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:01:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 19:01:23,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:01:23,527 INFO L175 Difference]: Start difference. First operand has 534 places, 461 transitions, 5591 flow. Second operand 10 states and 110 transitions. [2024-06-21 19:01:23,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 473 transitions, 6587 flow [2024-06-21 19:01:26,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 473 transitions, 6477 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:01:26,010 INFO L231 Difference]: Finished difference. Result has 534 places, 462 transitions, 5551 flow [2024-06-21 19:01:26,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5551, PETRI_PLACES=534, PETRI_TRANSITIONS=462} [2024-06-21 19:01:26,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 504 predicate places. [2024-06-21 19:01:26,010 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 462 transitions, 5551 flow [2024-06-21 19:01:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:26,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:26,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:26,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 19:01:26,011 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:26,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -61414, now seen corresponding path program 25 times [2024-06-21 19:01:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022709841] [2024-06-21 19:01:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:28,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022709841] [2024-06-21 19:01:28,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022709841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:28,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:28,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729183708] [2024-06-21 19:01:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:28,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:28,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:28,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 462 transitions, 5551 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:28,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:28,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:29,168 INFO L124 PetriNetUnfolderBase]: 1110/1988 cut-off events. [2024-06-21 19:01:29,169 INFO L125 PetriNetUnfolderBase]: For 507379/507379 co-relation queries the response was YES. [2024-06-21 19:01:29,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17102 conditions, 1988 events. 1110/1988 cut-off events. For 507379/507379 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 12095 event pairs, 205 based on Foata normal form. 2/1988 useless extension candidates. Maximal degree in co-relation 16857. Up to 1874 conditions per place. [2024-06-21 19:01:29,203 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 433 selfloop transitions, 43 changer transitions 0/478 dead transitions. [2024-06-21 19:01:29,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 478 transitions, 6669 flow [2024-06-21 19:01:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:01:29,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:01:29,204 INFO L175 Difference]: Start difference. First operand has 534 places, 462 transitions, 5551 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:01:29,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 478 transitions, 6669 flow [2024-06-21 19:01:31,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 478 transitions, 6602 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:01:31,727 INFO L231 Difference]: Finished difference. Result has 537 places, 464 transitions, 5683 flow [2024-06-21 19:01:31,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5683, PETRI_PLACES=537, PETRI_TRANSITIONS=464} [2024-06-21 19:01:31,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 507 predicate places. [2024-06-21 19:01:31,728 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 464 transitions, 5683 flow [2024-06-21 19:01:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:31,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:31,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:31,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 19:01:31,729 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:31,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -67924, now seen corresponding path program 26 times [2024-06-21 19:01:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179262132] [2024-06-21 19:01:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:31,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:33,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:33,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179262132] [2024-06-21 19:01:33,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179262132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:33,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889639398] [2024-06-21 19:01:33,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:33,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:33,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:33,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:33,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 464 transitions, 5683 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:33,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:33,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:33,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:34,551 INFO L124 PetriNetUnfolderBase]: 1106/1982 cut-off events. [2024-06-21 19:01:34,551 INFO L125 PetriNetUnfolderBase]: For 479453/479453 co-relation queries the response was YES. [2024-06-21 19:01:34,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16700 conditions, 1982 events. 1106/1982 cut-off events. For 479453/479453 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 12080 event pairs, 216 based on Foata normal form. 2/1982 useless extension candidates. Maximal degree in co-relation 16454. Up to 1921 conditions per place. [2024-06-21 19:01:34,584 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 440 selfloop transitions, 33 changer transitions 0/475 dead transitions. [2024-06-21 19:01:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 475 transitions, 6661 flow [2024-06-21 19:01:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:01:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:01:34,585 INFO L175 Difference]: Start difference. First operand has 537 places, 464 transitions, 5683 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:01:34,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 475 transitions, 6661 flow [2024-06-21 19:01:36,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 475 transitions, 6416 flow, removed 81 selfloop flow, removed 10 redundant places. [2024-06-21 19:01:36,907 INFO L231 Difference]: Finished difference. Result has 539 places, 464 transitions, 5509 flow [2024-06-21 19:01:36,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5509, PETRI_PLACES=539, PETRI_TRANSITIONS=464} [2024-06-21 19:01:36,907 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 509 predicate places. [2024-06-21 19:01:36,908 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 464 transitions, 5509 flow [2024-06-21 19:01:36,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:36,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:36,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:36,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 19:01:36,908 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 862023696, now seen corresponding path program 29 times [2024-06-21 19:01:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442493865] [2024-06-21 19:01:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:38,405 INFO 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 19:01:38,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442493865] [2024-06-21 19:01:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442493865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:38,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:38,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135163420] [2024-06-21 19:01:38,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:38,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:38,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:38,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:38,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 464 transitions, 5509 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:38,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:38,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:39,225 INFO L124 PetriNetUnfolderBase]: 1117/2003 cut-off events. [2024-06-21 19:01:39,225 INFO L125 PetriNetUnfolderBase]: For 516069/516069 co-relation queries the response was YES. [2024-06-21 19:01:39,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17021 conditions, 2003 events. 1117/2003 cut-off events. For 516069/516069 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 12254 event pairs, 215 based on Foata normal form. 2/2003 useless extension candidates. Maximal degree in co-relation 16774. Up to 1890 conditions per place. [2024-06-21 19:01:39,259 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 433 selfloop transitions, 44 changer transitions 0/479 dead transitions. [2024-06-21 19:01:39,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 479 transitions, 6931 flow [2024-06-21 19:01:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:01:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:01:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:01:39,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:01:39,260 INFO L175 Difference]: Start difference. First operand has 539 places, 464 transitions, 5509 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:01:39,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 479 transitions, 6931 flow [2024-06-21 19:01:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 479 transitions, 6827 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 19:01:41,763 INFO L231 Difference]: Finished difference. Result has 539 places, 466 transitions, 5571 flow [2024-06-21 19:01:41,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5571, PETRI_PLACES=539, PETRI_TRANSITIONS=466} [2024-06-21 19:01:41,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 509 predicate places. [2024-06-21 19:01:41,763 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 466 transitions, 5571 flow [2024-06-21 19:01:41,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:41,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:41,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:41,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 19:01:41,764 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:41,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 862028346, now seen corresponding path program 30 times [2024-06-21 19:01:41,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433625654] [2024-06-21 19:01:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:43,295 INFO 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 19:01:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433625654] [2024-06-21 19:01:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433625654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:43,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:43,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:43,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018543028] [2024-06-21 19:01:43,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:43,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:43,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:43,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:43,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 466 transitions, 5571 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:43,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:43,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:43,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:44,145 INFO L124 PetriNetUnfolderBase]: 1121/2011 cut-off events. [2024-06-21 19:01:44,145 INFO L125 PetriNetUnfolderBase]: For 522430/522430 co-relation queries the response was YES. [2024-06-21 19:01:44,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17136 conditions, 2011 events. 1121/2011 cut-off events. For 522430/522430 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 12330 event pairs, 219 based on Foata normal form. 2/2011 useless extension candidates. Maximal degree in co-relation 16888. Up to 1923 conditions per place. [2024-06-21 19:01:44,182 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 434 selfloop transitions, 42 changer transitions 0/478 dead transitions. [2024-06-21 19:01:44,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 478 transitions, 6585 flow [2024-06-21 19:01:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:01:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:01:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:01:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:01:44,183 INFO L175 Difference]: Start difference. First operand has 539 places, 466 transitions, 5571 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:01:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 478 transitions, 6585 flow [2024-06-21 19:01:46,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 478 transitions, 6496 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:46,754 INFO L231 Difference]: Finished difference. Result has 543 places, 467 transitions, 5610 flow [2024-06-21 19:01:46,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5610, PETRI_PLACES=543, PETRI_TRANSITIONS=467} [2024-06-21 19:01:46,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 513 predicate places. [2024-06-21 19:01:46,755 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 467 transitions, 5610 flow [2024-06-21 19:01:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:46,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:46,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 19:01:46,755 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:46,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -632224086, now seen corresponding path program 27 times [2024-06-21 19:01:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77875247] [2024-06-21 19:01:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77875247] [2024-06-21 19:01:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77875247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:48,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667692553] [2024-06-21 19:01:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:49,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:49,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 467 transitions, 5610 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:49,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:49,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:49,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:49,930 INFO L124 PetriNetUnfolderBase]: 1127/2021 cut-off events. [2024-06-21 19:01:49,931 INFO L125 PetriNetUnfolderBase]: For 529370/529370 co-relation queries the response was YES. [2024-06-21 19:01:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 2021 events. 1127/2021 cut-off events. For 529370/529370 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 12396 event pairs, 215 based on Foata normal form. 2/2021 useless extension candidates. Maximal degree in co-relation 17105. Up to 1948 conditions per place. [2024-06-21 19:01:49,965 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 451 selfloop transitions, 30 changer transitions 0/483 dead transitions. [2024-06-21 19:01:49,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 483 transitions, 6742 flow [2024-06-21 19:01:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:01:49,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:01:49,966 INFO L175 Difference]: Start difference. First operand has 543 places, 467 transitions, 5610 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:01:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 483 transitions, 6742 flow [2024-06-21 19:01:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 483 transitions, 6630 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:01:52,671 INFO L231 Difference]: Finished difference. Result has 546 places, 469 transitions, 5675 flow [2024-06-21 19:01:52,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5675, PETRI_PLACES=546, PETRI_TRANSITIONS=469} [2024-06-21 19:01:52,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 516 predicate places. [2024-06-21 19:01:52,671 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 469 transitions, 5675 flow [2024-06-21 19:01:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:52,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:52,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:52,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 19:01:52,672 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:52,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 30265532, now seen corresponding path program 28 times [2024-06-21 19:01:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:52,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436252842] [2024-06-21 19:01:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:52,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:54,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436252842] [2024-06-21 19:01:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436252842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:54,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:54,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780071805] [2024-06-21 19:01:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:54,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:54,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 469 transitions, 5675 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:54,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:54,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:54,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:55,368 INFO L124 PetriNetUnfolderBase]: 1133/2031 cut-off events. [2024-06-21 19:01:55,368 INFO L125 PetriNetUnfolderBase]: For 536807/536807 co-relation queries the response was YES. [2024-06-21 19:01:55,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17523 conditions, 2031 events. 1133/2031 cut-off events. For 536807/536807 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 12467 event pairs, 218 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 17272. Up to 1938 conditions per place. [2024-06-21 19:01:55,400 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 439 selfloop transitions, 42 changer transitions 0/483 dead transitions. [2024-06-21 19:01:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 483 transitions, 6791 flow [2024-06-21 19:01:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:01:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:01:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 19:01:55,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 19:01:55,401 INFO L175 Difference]: Start difference. First operand has 546 places, 469 transitions, 5675 flow. Second operand 12 states and 133 transitions. [2024-06-21 19:01:55,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 483 transitions, 6791 flow [2024-06-21 19:01:58,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 483 transitions, 6636 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-06-21 19:01:58,141 INFO L231 Difference]: Finished difference. Result has 548 places, 471 transitions, 5725 flow [2024-06-21 19:01:58,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5725, PETRI_PLACES=548, PETRI_TRANSITIONS=471} [2024-06-21 19:01:58,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 518 predicate places. [2024-06-21 19:01:58,142 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 471 transitions, 5725 flow [2024-06-21 19:01:58,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:58,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:58,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 19:01:58,142 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:01:58,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 831874380, now seen corresponding path program 31 times [2024-06-21 19:01:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950236408] [2024-06-21 19:01:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:59,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:59,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950236408] [2024-06-21 19:01:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950236408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:01:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771151051] [2024-06-21 19:01:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:01:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:01:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:01:59,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:01:59,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 471 transitions, 5725 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:01:59,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:59,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:01:59,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:00,616 INFO L124 PetriNetUnfolderBase]: 1137/2039 cut-off events. [2024-06-21 19:02:00,616 INFO L125 PetriNetUnfolderBase]: For 541197/541197 co-relation queries the response was YES. [2024-06-21 19:02:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17521 conditions, 2039 events. 1137/2039 cut-off events. For 541197/541197 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 12504 event pairs, 221 based on Foata normal form. 2/2039 useless extension candidates. Maximal degree in co-relation 17269. Up to 1987 conditions per place. [2024-06-21 19:02:00,651 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 454 selfloop transitions, 27 changer transitions 0/483 dead transitions. [2024-06-21 19:02:00,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 483 transitions, 6749 flow [2024-06-21 19:02:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-21 19:02:00,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 19:02:00,652 INFO L175 Difference]: Start difference. First operand has 548 places, 471 transitions, 5725 flow. Second operand 12 states and 124 transitions. [2024-06-21 19:02:00,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 483 transitions, 6749 flow [2024-06-21 19:02:03,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 483 transitions, 6566 flow, removed 51 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:03,430 INFO L231 Difference]: Finished difference. Result has 550 places, 472 transitions, 5640 flow [2024-06-21 19:02:03,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5640, PETRI_PLACES=550, PETRI_TRANSITIONS=472} [2024-06-21 19:02:03,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 520 predicate places. [2024-06-21 19:02:03,431 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 472 transitions, 5640 flow [2024-06-21 19:02:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:03,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:03,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 19:02:03,431 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:03,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 862028532, now seen corresponding path program 29 times [2024-06-21 19:02:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:03,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003640722] [2024-06-21 19:02:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:05,077 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 19:02:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:05,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003640722] [2024-06-21 19:02:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003640722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:05,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:05,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072985665] [2024-06-21 19:02:05,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:05,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:05,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 472 transitions, 5640 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:05,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:05,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:06,047 INFO L124 PetriNetUnfolderBase]: 1143/2049 cut-off events. [2024-06-21 19:02:06,047 INFO L125 PetriNetUnfolderBase]: For 546797/546797 co-relation queries the response was YES. [2024-06-21 19:02:06,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17574 conditions, 2049 events. 1143/2049 cut-off events. For 546797/546797 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 12585 event pairs, 220 based on Foata normal form. 2/2049 useless extension candidates. Maximal degree in co-relation 17321. Up to 1931 conditions per place. [2024-06-21 19:02:06,177 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 431 selfloop transitions, 53 changer transitions 0/486 dead transitions. [2024-06-21 19:02:06,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 486 transitions, 6766 flow [2024-06-21 19:02:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:02:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:02:06,178 INFO L175 Difference]: Start difference. First operand has 550 places, 472 transitions, 5640 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:02:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 486 transitions, 6766 flow [2024-06-21 19:02:09,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 486 transitions, 6682 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:09,011 INFO L231 Difference]: Finished difference. Result has 552 places, 474 transitions, 5787 flow [2024-06-21 19:02:09,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5787, PETRI_PLACES=552, PETRI_TRANSITIONS=474} [2024-06-21 19:02:09,011 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 522 predicate places. [2024-06-21 19:02:09,011 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 474 transitions, 5787 flow [2024-06-21 19:02:09,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:09,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:09,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 19:02:09,012 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:09,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 199711708, now seen corresponding path program 32 times [2024-06-21 19:02:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:09,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702208090] [2024-06-21 19:02:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:10,579 INFO 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 19:02:10,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:10,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702208090] [2024-06-21 19:02:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702208090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:10,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:10,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:02:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062678884] [2024-06-21 19:02:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:10,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:02:10,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:02:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:02:10,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:10,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 474 transitions, 5787 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:10,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:10,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:10,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:11,530 INFO L124 PetriNetUnfolderBase]: 1140/2044 cut-off events. [2024-06-21 19:02:11,531 INFO L125 PetriNetUnfolderBase]: For 516600/516600 co-relation queries the response was YES. [2024-06-21 19:02:11,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17184 conditions, 2044 events. 1140/2044 cut-off events. For 516600/516600 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 12568 event pairs, 219 based on Foata normal form. 2/2044 useless extension candidates. Maximal degree in co-relation 16930. Up to 2007 conditions per place. [2024-06-21 19:02:11,566 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 464 selfloop transitions, 19 changer transitions 0/485 dead transitions. [2024-06-21 19:02:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 485 transitions, 6777 flow [2024-06-21 19:02:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-21 19:02:11,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526881720430106 [2024-06-21 19:02:11,568 INFO L175 Difference]: Start difference. First operand has 552 places, 474 transitions, 5787 flow. Second operand 12 states and 121 transitions. [2024-06-21 19:02:11,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 485 transitions, 6777 flow [2024-06-21 19:02:14,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 485 transitions, 6540 flow, removed 67 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:14,674 INFO L231 Difference]: Finished difference. Result has 554 places, 474 transitions, 5592 flow [2024-06-21 19:02:14,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5592, PETRI_PLACES=554, PETRI_TRANSITIONS=474} [2024-06-21 19:02:14,674 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 524 predicate places. [2024-06-21 19:02:14,674 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 474 transitions, 5592 flow [2024-06-21 19:02:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:14,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:14,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:14,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 19:02:14,675 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:14,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash 695794752, now seen corresponding path program 30 times [2024-06-21 19:02:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:14,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565227694] [2024-06-21 19:02:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:16,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:16,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565227694] [2024-06-21 19:02:16,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565227694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:16,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:16,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:16,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766009529] [2024-06-21 19:02:16,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:16,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:16,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:16,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 474 transitions, 5592 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:16,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:16,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:17,334 INFO L124 PetriNetUnfolderBase]: 1146/2054 cut-off events. [2024-06-21 19:02:17,334 INFO L125 PetriNetUnfolderBase]: For 520870/520870 co-relation queries the response was YES. [2024-06-21 19:02:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17131 conditions, 2054 events. 1146/2054 cut-off events. For 520870/520870 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 12651 event pairs, 219 based on Foata normal form. 2/2054 useless extension candidates. Maximal degree in co-relation 16876. Up to 1945 conditions per place. [2024-06-21 19:02:17,369 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 429 selfloop transitions, 56 changer transitions 0/487 dead transitions. [2024-06-21 19:02:17,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 487 transitions, 6714 flow [2024-06-21 19:02:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:02:17,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:02:17,377 INFO L175 Difference]: Start difference. First operand has 554 places, 474 transitions, 5592 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:02:17,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 487 transitions, 6714 flow [2024-06-21 19:02:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 487 transitions, 6662 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 19:02:20,468 INFO L231 Difference]: Finished difference. Result has 555 places, 476 transitions, 5781 flow [2024-06-21 19:02:20,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5781, PETRI_PLACES=555, PETRI_TRANSITIONS=476} [2024-06-21 19:02:20,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 525 predicate places. [2024-06-21 19:02:20,469 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 476 transitions, 5781 flow [2024-06-21 19:02:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:20,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:20,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:20,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 19:02:20,469 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:20,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1828859738, now seen corresponding path program 33 times [2024-06-21 19:02:20,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:20,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600789679] [2024-06-21 19:02:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:20,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:21,985 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 19:02:21,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600789679] [2024-06-21 19:02:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600789679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:21,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472692802] [2024-06-21 19:02:21,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:21,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:22,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:22,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 476 transitions, 5781 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:22,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:22,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:22,983 INFO L124 PetriNetUnfolderBase]: 1143/2049 cut-off events. [2024-06-21 19:02:22,983 INFO L125 PetriNetUnfolderBase]: For 490060/490060 co-relation queries the response was YES. [2024-06-21 19:02:23,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16797 conditions, 2049 events. 1143/2049 cut-off events. For 490060/490060 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 12575 event pairs, 221 based on Foata normal form. 2/2049 useless extension candidates. Maximal degree in co-relation 16541. Up to 1970 conditions per place. [2024-06-21 19:02:23,017 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 447 selfloop transitions, 38 changer transitions 0/487 dead transitions. [2024-06-21 19:02:23,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 487 transitions, 6775 flow [2024-06-21 19:02:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:02:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:02:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 19:02:23,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 19:02:23,019 INFO L175 Difference]: Start difference. First operand has 555 places, 476 transitions, 5781 flow. Second operand 11 states and 122 transitions. [2024-06-21 19:02:23,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 487 transitions, 6775 flow [2024-06-21 19:02:25,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 487 transitions, 6528 flow, removed 69 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:25,606 INFO L231 Difference]: Finished difference. Result has 556 places, 476 transitions, 5614 flow [2024-06-21 19:02:25,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5614, PETRI_PLACES=556, PETRI_TRANSITIONS=476} [2024-06-21 19:02:25,606 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 526 predicate places. [2024-06-21 19:02:25,606 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 476 transitions, 5614 flow [2024-06-21 19:02:25,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:25,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:25,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 19:02:25,607 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:25,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -136147924, now seen corresponding path program 34 times [2024-06-21 19:02:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:25,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912795763] [2024-06-21 19:02:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:27,133 INFO 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 19:02:27,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:27,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912795763] [2024-06-21 19:02:27,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912795763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:27,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:27,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:27,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305660553] [2024-06-21 19:02:27,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:27,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:27,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 476 transitions, 5614 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:27,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:27,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:27,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:27,963 INFO L124 PetriNetUnfolderBase]: 1147/2057 cut-off events. [2024-06-21 19:02:27,964 INFO L125 PetriNetUnfolderBase]: For 491975/491975 co-relation queries the response was YES. [2024-06-21 19:02:27,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16648 conditions, 2057 events. 1147/2057 cut-off events. For 491975/491975 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 12644 event pairs, 223 based on Foata normal form. 2/2057 useless extension candidates. Maximal degree in co-relation 16391. Up to 1972 conditions per place. [2024-06-21 19:02:27,999 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 443 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2024-06-21 19:02:27,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 488 transitions, 6648 flow [2024-06-21 19:02:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:02:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:02:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:02:28,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:02:28,000 INFO L175 Difference]: Start difference. First operand has 556 places, 476 transitions, 5614 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:02:28,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 488 transitions, 6648 flow [2024-06-21 19:02:30,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 488 transitions, 6562 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:30,945 INFO L231 Difference]: Finished difference. Result has 557 places, 477 transitions, 5658 flow [2024-06-21 19:02:30,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5658, PETRI_PLACES=557, PETRI_TRANSITIONS=477} [2024-06-21 19:02:30,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 527 predicate places. [2024-06-21 19:02:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 477 transitions, 5658 flow [2024-06-21 19:02:30,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:30,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:30,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 19:02:30,946 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:30,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 36521642, now seen corresponding path program 31 times [2024-06-21 19:02:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074048854] [2024-06-21 19:02:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074048854] [2024-06-21 19:02:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074048854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:32,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:32,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:02:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264678598] [2024-06-21 19:02:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:02:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:02:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:02:33,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:33,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 477 transitions, 5658 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:33,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:33,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:33,825 INFO L124 PetriNetUnfolderBase]: 1153/2067 cut-off events. [2024-06-21 19:02:33,825 INFO L125 PetriNetUnfolderBase]: For 499700/499700 co-relation queries the response was YES. [2024-06-21 19:02:33,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16897 conditions, 2067 events. 1153/2067 cut-off events. For 499700/499700 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 12714 event pairs, 223 based on Foata normal form. 2/2067 useless extension candidates. Maximal degree in co-relation 16639. Up to 1974 conditions per place. [2024-06-21 19:02:33,855 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 446 selfloop transitions, 43 changer transitions 0/491 dead transitions. [2024-06-21 19:02:33,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 491 transitions, 6802 flow [2024-06-21 19:02:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 19:02:33,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:02:33,856 INFO L175 Difference]: Start difference. First operand has 557 places, 477 transitions, 5658 flow. Second operand 12 states and 132 transitions. [2024-06-21 19:02:33,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 491 transitions, 6802 flow [2024-06-21 19:02:36,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 491 transitions, 6684 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 19:02:36,760 INFO L231 Difference]: Finished difference. Result has 560 places, 479 transitions, 5759 flow [2024-06-21 19:02:36,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5759, PETRI_PLACES=560, PETRI_TRANSITIONS=479} [2024-06-21 19:02:36,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 530 predicate places. [2024-06-21 19:02:36,761 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 479 transitions, 5759 flow [2024-06-21 19:02:36,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:36,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:36,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 19:02:36,762 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:36,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:36,762 INFO L85 PathProgramCache]: Analyzing trace with hash -136152574, now seen corresponding path program 35 times [2024-06-21 19:02:36,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:36,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454141812] [2024-06-21 19:02:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:38,279 INFO 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 19:02:38,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:38,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454141812] [2024-06-21 19:02:38,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454141812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:38,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:38,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327358232] [2024-06-21 19:02:38,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:38,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:38,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 479 transitions, 5759 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:39,123 INFO L124 PetriNetUnfolderBase]: 1150/2062 cut-off events. [2024-06-21 19:02:39,124 INFO L125 PetriNetUnfolderBase]: For 466396/466396 co-relation queries the response was YES. [2024-06-21 19:02:39,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16435 conditions, 2062 events. 1150/2062 cut-off events. For 466396/466396 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 12719 event pairs, 219 based on Foata normal form. 2/2062 useless extension candidates. Maximal degree in co-relation 16176. Up to 1957 conditions per place. [2024-06-21 19:02:39,160 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 444 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-21 19:02:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 491 transitions, 6763 flow [2024-06-21 19:02:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:02:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:02:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:02:39,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:02:39,161 INFO L175 Difference]: Start difference. First operand has 560 places, 479 transitions, 5759 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:02:39,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 491 transitions, 6763 flow [2024-06-21 19:02:42,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 491 transitions, 6546 flow, removed 67 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:42,030 INFO L231 Difference]: Finished difference. Result has 561 places, 479 transitions, 5636 flow [2024-06-21 19:02:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5636, PETRI_PLACES=561, PETRI_TRANSITIONS=479} [2024-06-21 19:02:42,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 531 predicate places. [2024-06-21 19:02:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 479 transitions, 5636 flow [2024-06-21 19:02:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:42,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:42,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 19:02:42,031 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:42,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -135968248, now seen corresponding path program 32 times [2024-06-21 19:02:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:42,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967572337] [2024-06-21 19:02:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:43,803 INFO 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 19:02:43,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:43,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967572337] [2024-06-21 19:02:43,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967572337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:43,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:43,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:02:43,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108021424] [2024-06-21 19:02:43,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:43,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:02:43,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:02:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:02:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:43,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 479 transitions, 5636 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:43,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:43,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:44,615 INFO L124 PetriNetUnfolderBase]: 1151/2064 cut-off events. [2024-06-21 19:02:44,615 INFO L125 PetriNetUnfolderBase]: For 450383/450383 co-relation queries the response was YES. [2024-06-21 19:02:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16144 conditions, 2064 events. 1151/2064 cut-off events. For 450383/450383 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 12715 event pairs, 221 based on Foata normal form. 2/2064 useless extension candidates. Maximal degree in co-relation 15884. Up to 1971 conditions per place. [2024-06-21 19:02:44,651 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 445 selfloop transitions, 46 changer transitions 0/493 dead transitions. [2024-06-21 19:02:44,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 493 transitions, 6788 flow [2024-06-21 19:02:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:02:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:02:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 19:02:44,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:02:44,652 INFO L175 Difference]: Start difference. First operand has 561 places, 479 transitions, 5636 flow. Second operand 12 states and 132 transitions. [2024-06-21 19:02:44,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 493 transitions, 6788 flow [2024-06-21 19:02:47,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 493 transitions, 6608 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 19:02:47,456 INFO L231 Difference]: Finished difference. Result has 561 places, 481 transitions, 5685 flow [2024-06-21 19:02:47,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5456, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5685, PETRI_PLACES=561, PETRI_TRANSITIONS=481} [2024-06-21 19:02:47,457 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 531 predicate places. [2024-06-21 19:02:47,457 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 481 transitions, 5685 flow [2024-06-21 19:02:47,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 19:02:47,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:47,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 19:02:47,458 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:47,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1673164062, now seen corresponding path program 36 times [2024-06-21 19:02:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:47,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162695518] [2024-06-21 19:02:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:49,175 INFO 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 19:02:49,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162695518] [2024-06-21 19:02:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162695518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:02:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532236001] [2024-06-21 19:02:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:49,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:02:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:02:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:02:49,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:02:49,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 481 transitions, 5685 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 19:02:49,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:49,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:02:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:50,207 INFO L124 PetriNetUnfolderBase]: 1049/1972 cut-off events. [2024-06-21 19:02:50,208 INFO L125 PetriNetUnfolderBase]: For 509949/509952 co-relation queries the response was YES. [2024-06-21 19:02:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15775 conditions, 1972 events. 1049/1972 cut-off events. For 509949/509952 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 12746 event pairs, 94 based on Foata normal form. 3/1973 useless extension candidates. Maximal degree in co-relation 15516. Up to 1178 conditions per place. [2024-06-21 19:02:50,239 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 274 selfloop transitions, 59 changer transitions 0/503 dead transitions. [2024-06-21 19:02:50,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 503 transitions, 6879 flow [2024-06-21 19:02:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:02:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:02:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 19:02:50,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 19:02:50,240 INFO L175 Difference]: Start difference. First operand has 561 places, 481 transitions, 5685 flow. Second operand 11 states and 146 transitions. [2024-06-21 19:02:50,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 503 transitions, 6879 flow [2024-06-21 19:02:53,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 503 transitions, 6672 flow, removed 59 selfloop flow, removed 10 redundant places. [2024-06-21 19:02:53,589 INFO L231 Difference]: Finished difference. Result has 562 places, 483 transitions, 5697 flow [2024-06-21 19:02:53,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5697, PETRI_PLACES=562, PETRI_TRANSITIONS=483} [2024-06-21 19:02:53,590 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 532 predicate places. [2024-06-21 19:02:53,590 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 483 transitions, 5697 flow [2024-06-21 19:02:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 19:02:53,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:53,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:53,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 19:02:53,590 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:53,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:53,590 INFO L85 PathProgramCache]: Analyzing trace with hash -694592234, now seen corresponding path program 33 times [2024-06-21 19:02:53,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:53,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699918611] [2024-06-21 19:02:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:53,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:55,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:55,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699918611] [2024-06-21 19:02:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699918611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:55,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:55,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:02:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582132876] [2024-06-21 19:02:55,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:02:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:02:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:02:55,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:02:55,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 483 transitions, 5697 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:55,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:55,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:02:55,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:56,703 INFO L124 PetriNetUnfolderBase]: 1174/2105 cut-off events. [2024-06-21 19:02:56,703 INFO L125 PetriNetUnfolderBase]: For 499169/499169 co-relation queries the response was YES. [2024-06-21 19:02:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 2105 events. 1174/2105 cut-off events. For 499169/499169 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 13002 event pairs, 149 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 16546. Up to 1918 conditions per place. [2024-06-21 19:02:56,741 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 435 selfloop transitions, 75 changer transitions 0/512 dead transitions. [2024-06-21 19:02:56,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 512 transitions, 6930 flow [2024-06-21 19:02:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:02:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:02:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-06-21 19:02:56,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771712158808933 [2024-06-21 19:02:56,743 INFO L175 Difference]: Start difference. First operand has 562 places, 483 transitions, 5697 flow. Second operand 13 states and 152 transitions. [2024-06-21 19:02:56,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 512 transitions, 6930 flow [2024-06-21 19:02:59,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 512 transitions, 6829 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 19:02:59,764 INFO L231 Difference]: Finished difference. Result has 568 places, 490 transitions, 5955 flow [2024-06-21 19:02:59,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5955, PETRI_PLACES=568, PETRI_TRANSITIONS=490} [2024-06-21 19:02:59,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 538 predicate places. [2024-06-21 19:02:59,764 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 490 transitions, 5955 flow [2024-06-21 19:02:59,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:59,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:59,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:59,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 19:02:59,764 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:02:59,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1497107076, now seen corresponding path program 37 times [2024-06-21 19:02:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:59,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766065050] [2024-06-21 19:02:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:01,346 INFO 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 19:03:01,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766065050] [2024-06-21 19:03:01,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766065050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:01,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:01,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:01,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054372218] [2024-06-21 19:03:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:01,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 490 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:02,300 INFO L124 PetriNetUnfolderBase]: 1182/2121 cut-off events. [2024-06-21 19:03:02,300 INFO L125 PetriNetUnfolderBase]: For 500175/500175 co-relation queries the response was YES. [2024-06-21 19:03:02,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17196 conditions, 2121 events. 1182/2121 cut-off events. For 500175/500175 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 13143 event pairs, 103 based on Foata normal form. 2/2121 useless extension candidates. Maximal degree in co-relation 16934. Up to 1631 conditions per place. [2024-06-21 19:03:02,333 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 428 selfloop transitions, 84 changer transitions 0/514 dead transitions. [2024-06-21 19:03:02,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 514 transitions, 7480 flow [2024-06-21 19:03:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:03:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:03:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:03:02,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:03:02,334 INFO L175 Difference]: Start difference. First operand has 568 places, 490 transitions, 5955 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:03:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 514 transitions, 7480 flow [2024-06-21 19:03:05,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 514 transitions, 7266 flow, removed 48 selfloop flow, removed 11 redundant places. [2024-06-21 19:03:05,415 INFO L231 Difference]: Finished difference. Result has 568 places, 492 transitions, 5970 flow [2024-06-21 19:03:05,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5970, PETRI_PLACES=568, PETRI_TRANSITIONS=492} [2024-06-21 19:03:05,416 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 538 predicate places. [2024-06-21 19:03:05,416 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 492 transitions, 5970 flow [2024-06-21 19:03:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:05,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:05,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:05,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 19:03:05,416 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:05,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1138682370, now seen corresponding path program 34 times [2024-06-21 19:03:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009110676] [2024-06-21 19:03:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:07,368 INFO 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 19:03:07,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:07,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009110676] [2024-06-21 19:03:07,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009110676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:07,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:07,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:03:07,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35076130] [2024-06-21 19:03:07,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:07,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:03:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:03:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:03:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:07,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 492 transitions, 5970 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:07,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:08,326 INFO L124 PetriNetUnfolderBase]: 1198/2147 cut-off events. [2024-06-21 19:03:08,326 INFO L125 PetriNetUnfolderBase]: For 545742/545742 co-relation queries the response was YES. [2024-06-21 19:03:08,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17986 conditions, 2147 events. 1198/2147 cut-off events. For 545742/545742 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 13300 event pairs, 154 based on Foata normal form. 2/2147 useless extension candidates. Maximal degree in co-relation 17725. Up to 1911 conditions per place. [2024-06-21 19:03:08,365 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 427 selfloop transitions, 89 changer transitions 0/518 dead transitions. [2024-06-21 19:03:08,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 518 transitions, 7669 flow [2024-06-21 19:03:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:03:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:03:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-21 19:03:08,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:03:08,366 INFO L175 Difference]: Start difference. First operand has 568 places, 492 transitions, 5970 flow. Second operand 12 states and 155 transitions. [2024-06-21 19:03:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 518 transitions, 7669 flow [2024-06-21 19:03:11,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 518 transitions, 7471 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:11,684 INFO L231 Difference]: Finished difference. Result has 571 places, 496 transitions, 6151 flow [2024-06-21 19:03:11,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5774, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6151, PETRI_PLACES=571, PETRI_TRANSITIONS=496} [2024-06-21 19:03:11,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 541 predicate places. [2024-06-21 19:03:11,684 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 496 transitions, 6151 flow [2024-06-21 19:03:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:11,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:11,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:11,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 19:03:11,685 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:11,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1138502694, now seen corresponding path program 38 times [2024-06-21 19:03:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373060696] [2024-06-21 19:03:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:13,212 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 19:03:13,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:13,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373060696] [2024-06-21 19:03:13,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373060696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:13,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:13,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:13,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355466503] [2024-06-21 19:03:13,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:13,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:13,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:13,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:13,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 496 transitions, 6151 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:13,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:13,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:13,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:14,166 INFO L124 PetriNetUnfolderBase]: 1217/2184 cut-off events. [2024-06-21 19:03:14,166 INFO L125 PetriNetUnfolderBase]: For 585717/585717 co-relation queries the response was YES. [2024-06-21 19:03:14,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18530 conditions, 2184 events. 1217/2184 cut-off events. For 585717/585717 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 13584 event pairs, 161 based on Foata normal form. 2/2184 useless extension candidates. Maximal degree in co-relation 18268. Up to 1966 conditions per place. [2024-06-21 19:03:14,199 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 441 selfloop transitions, 77 changer transitions 0/520 dead transitions. [2024-06-21 19:03:14,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 520 transitions, 7699 flow [2024-06-21 19:03:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:03:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:03:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 19:03:14,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 19:03:14,200 INFO L175 Difference]: Start difference. First operand has 571 places, 496 transitions, 6151 flow. Second operand 12 states and 152 transitions. [2024-06-21 19:03:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 520 transitions, 7699 flow [2024-06-21 19:03:18,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 520 transitions, 7513 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:18,138 INFO L231 Difference]: Finished difference. Result has 574 places, 500 transitions, 6199 flow [2024-06-21 19:03:18,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5967, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6199, PETRI_PLACES=574, PETRI_TRANSITIONS=500} [2024-06-21 19:03:18,138 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 544 predicate places. [2024-06-21 19:03:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 500 transitions, 6199 flow [2024-06-21 19:03:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:18,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 19:03:18,139 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:18,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1134034044, now seen corresponding path program 39 times [2024-06-21 19:03:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:18,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203258328] [2024-06-21 19:03:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:19,741 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 19:03:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203258328] [2024-06-21 19:03:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203258328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:19,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:19,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:19,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025557772] [2024-06-21 19:03:19,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:19,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:19,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 500 transitions, 6199 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:19,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:19,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:19,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:20,615 INFO L124 PetriNetUnfolderBase]: 1221/2192 cut-off events. [2024-06-21 19:03:20,615 INFO L125 PetriNetUnfolderBase]: For 583167/583167 co-relation queries the response was YES. [2024-06-21 19:03:20,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18527 conditions, 2192 events. 1221/2192 cut-off events. For 583167/583167 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 13641 event pairs, 146 based on Foata normal form. 2/2192 useless extension candidates. Maximal degree in co-relation 18264. Up to 1908 conditions per place. [2024-06-21 19:03:20,655 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 441 selfloop transitions, 79 changer transitions 0/522 dead transitions. [2024-06-21 19:03:20,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 522 transitions, 7716 flow [2024-06-21 19:03:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:03:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:03:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 19:03:20,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-21 19:03:20,657 INFO L175 Difference]: Start difference. First operand has 574 places, 500 transitions, 6199 flow. Second operand 11 states and 147 transitions. [2024-06-21 19:03:20,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 522 transitions, 7716 flow [2024-06-21 19:03:24,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 522 transitions, 7594 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:24,595 INFO L231 Difference]: Finished difference. Result has 576 places, 501 transitions, 6276 flow [2024-06-21 19:03:24,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6079, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6276, PETRI_PLACES=576, PETRI_TRANSITIONS=501} [2024-06-21 19:03:24,596 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2024-06-21 19:03:24,596 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 501 transitions, 6276 flow [2024-06-21 19:03:24,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:24,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:24,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 19:03:24,596 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:24,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash 378160286, now seen corresponding path program 40 times [2024-06-21 19:03:24,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:24,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502761834] [2024-06-21 19:03:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:26,152 INFO 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 19:03:26,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:26,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502761834] [2024-06-21 19:03:26,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502761834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:26,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:26,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577097917] [2024-06-21 19:03:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:26,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 501 transitions, 6276 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:26,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:26,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:27,125 INFO L124 PetriNetUnfolderBase]: 1218/2187 cut-off events. [2024-06-21 19:03:27,125 INFO L125 PetriNetUnfolderBase]: For 543661/543661 co-relation queries the response was YES. [2024-06-21 19:03:27,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18204 conditions, 2187 events. 1218/2187 cut-off events. For 543661/543661 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 13654 event pairs, 173 based on Foata normal form. 2/2187 useless extension candidates. Maximal degree in co-relation 17941. Up to 2014 conditions per place. [2024-06-21 19:03:27,165 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 443 selfloop transitions, 74 changer transitions 0/519 dead transitions. [2024-06-21 19:03:27,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 519 transitions, 7354 flow [2024-06-21 19:03:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:03:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:03:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 19:03:27,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 19:03:27,166 INFO L175 Difference]: Start difference. First operand has 576 places, 501 transitions, 6276 flow. Second operand 12 states and 149 transitions. [2024-06-21 19:03:27,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 519 transitions, 7354 flow [2024-06-21 19:03:30,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 519 transitions, 7154 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 19:03:30,972 INFO L231 Difference]: Finished difference. Result has 578 places, 501 transitions, 6232 flow [2024-06-21 19:03:30,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6232, PETRI_PLACES=578, PETRI_TRANSITIONS=501} [2024-06-21 19:03:30,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 548 predicate places. [2024-06-21 19:03:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 501 transitions, 6232 flow [2024-06-21 19:03:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:30,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:30,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:30,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 19:03:30,973 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:30,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1305949376, now seen corresponding path program 41 times [2024-06-21 19:03:30,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:30,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071472732] [2024-06-21 19:03:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:30,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:32,444 INFO 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 19:03:32,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071472732] [2024-06-21 19:03:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071472732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:32,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:32,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786450655] [2024-06-21 19:03:32,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:32,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:32,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:32,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 501 transitions, 6232 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:32,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:32,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:32,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:33,495 INFO L124 PetriNetUnfolderBase]: 1222/2195 cut-off events. [2024-06-21 19:03:33,495 INFO L125 PetriNetUnfolderBase]: For 543311/543311 co-relation queries the response was YES. [2024-06-21 19:03:33,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18173 conditions, 2195 events. 1222/2195 cut-off events. For 543311/543311 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 13660 event pairs, 198 based on Foata normal form. 2/2195 useless extension candidates. Maximal degree in co-relation 17909. Up to 2108 conditions per place. [2024-06-21 19:03:33,535 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 475 selfloop transitions, 40 changer transitions 0/517 dead transitions. [2024-06-21 19:03:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 517 transitions, 7329 flow [2024-06-21 19:03:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:03:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:03:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 19:03:33,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:03:33,536 INFO L175 Difference]: Start difference. First operand has 578 places, 501 transitions, 6232 flow. Second operand 10 states and 124 transitions. [2024-06-21 19:03:33,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 517 transitions, 7329 flow [2024-06-21 19:03:37,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 517 transitions, 7171 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 19:03:37,245 INFO L231 Difference]: Finished difference. Result has 576 places, 502 transitions, 6193 flow [2024-06-21 19:03:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=576, PETRI_TRANSITIONS=502} [2024-06-21 19:03:37,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2024-06-21 19:03:37,245 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 502 transitions, 6193 flow [2024-06-21 19:03:37,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:37,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:37,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:37,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 19:03:37,245 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:37,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1312259426, now seen corresponding path program 42 times [2024-06-21 19:03:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:37,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689288591] [2024-06-21 19:03:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:37,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:38,772 INFO 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 19:03:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:38,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689288591] [2024-06-21 19:03:38,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689288591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:38,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:38,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:38,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158224063] [2024-06-21 19:03:38,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:38,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:38,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:38,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:38,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 502 transitions, 6193 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:38,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:38,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:38,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:39,748 INFO L124 PetriNetUnfolderBase]: 1226/2203 cut-off events. [2024-06-21 19:03:39,748 INFO L125 PetriNetUnfolderBase]: For 543397/543397 co-relation queries the response was YES. [2024-06-21 19:03:39,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18179 conditions, 2203 events. 1226/2203 cut-off events. For 543397/543397 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 13731 event pairs, 199 based on Foata normal form. 2/2203 useless extension candidates. Maximal degree in co-relation 17916. Up to 2102 conditions per place. [2024-06-21 19:03:39,788 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 471 selfloop transitions, 45 changer transitions 0/518 dead transitions. [2024-06-21 19:03:39,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 518 transitions, 7294 flow [2024-06-21 19:03:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:03:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:03:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 19:03:39,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 19:03:39,789 INFO L175 Difference]: Start difference. First operand has 576 places, 502 transitions, 6193 flow. Second operand 10 states and 126 transitions. [2024-06-21 19:03:39,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 518 transitions, 7294 flow [2024-06-21 19:03:43,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 518 transitions, 7183 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:43,555 INFO L231 Difference]: Finished difference. Result has 577 places, 503 transitions, 6213 flow [2024-06-21 19:03:43,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6082, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6213, PETRI_PLACES=577, PETRI_TRANSITIONS=503} [2024-06-21 19:03:43,556 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 547 predicate places. [2024-06-21 19:03:43,556 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 503 transitions, 6213 flow [2024-06-21 19:03:43,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:43,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:43,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 19:03:43,556 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:43,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:43,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1478613176, now seen corresponding path program 43 times [2024-06-21 19:03:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340506310] [2024-06-21 19:03:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:43,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:45,223 INFO 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 19:03:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340506310] [2024-06-21 19:03:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340506310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:45,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:45,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:03:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394941995] [2024-06-21 19:03:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:03:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:03:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:03:45,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:45,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 503 transitions, 6213 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:45,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:45,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:46,217 INFO L124 PetriNetUnfolderBase]: 1230/2211 cut-off events. [2024-06-21 19:03:46,218 INFO L125 PetriNetUnfolderBase]: For 543439/543439 co-relation queries the response was YES. [2024-06-21 19:03:46,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18229 conditions, 2211 events. 1230/2211 cut-off events. For 543439/543439 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 13782 event pairs, 180 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 17966. Up to 1971 conditions per place. [2024-06-21 19:03:46,255 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 459 selfloop transitions, 61 changer transitions 0/522 dead transitions. [2024-06-21 19:03:46,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 522 transitions, 7728 flow [2024-06-21 19:03:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:03:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:03:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 19:03:46,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 19:03:46,256 INFO L175 Difference]: Start difference. First operand has 577 places, 503 transitions, 6213 flow. Second operand 11 states and 138 transitions. [2024-06-21 19:03:46,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 522 transitions, 7728 flow [2024-06-21 19:03:50,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 522 transitions, 7610 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:50,009 INFO L231 Difference]: Finished difference. Result has 579 places, 504 transitions, 6260 flow [2024-06-21 19:03:50,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6260, PETRI_PLACES=579, PETRI_TRANSITIONS=504} [2024-06-21 19:03:50,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 549 predicate places. [2024-06-21 19:03:50,009 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 504 transitions, 6260 flow [2024-06-21 19:03:50,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:50,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:50,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 19:03:50,010 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:50,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1305943610, now seen corresponding path program 35 times [2024-06-21 19:03:50,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:50,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838738847] [2024-06-21 19:03:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:50,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:51,670 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 19:03:51,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:51,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838738847] [2024-06-21 19:03:51,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838738847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:51,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:51,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:51,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024762714] [2024-06-21 19:03:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:51,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:51,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:51,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 504 transitions, 6260 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:51,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:51,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:51,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:52,770 INFO L124 PetriNetUnfolderBase]: 1236/2221 cut-off events. [2024-06-21 19:03:52,771 INFO L125 PetriNetUnfolderBase]: For 544119/544119 co-relation queries the response was YES. [2024-06-21 19:03:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18382 conditions, 2221 events. 1236/2221 cut-off events. For 544119/544119 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 13855 event pairs, 203 based on Foata normal form. 2/2221 useless extension candidates. Maximal degree in co-relation 18118. Up to 2102 conditions per place. [2024-06-21 19:03:52,810 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 468 selfloop transitions, 53 changer transitions 0/523 dead transitions. [2024-06-21 19:03:52,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 523 transitions, 7435 flow [2024-06-21 19:03:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:03:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:03:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 19:03:52,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 19:03:52,811 INFO L175 Difference]: Start difference. First operand has 579 places, 504 transitions, 6260 flow. Second operand 11 states and 136 transitions. [2024-06-21 19:03:52,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 523 transitions, 7435 flow [2024-06-21 19:03:56,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 523 transitions, 7219 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 19:03:56,429 INFO L231 Difference]: Finished difference. Result has 579 places, 506 transitions, 6232 flow [2024-06-21 19:03:56,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6044, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6232, PETRI_PLACES=579, PETRI_TRANSITIONS=506} [2024-06-21 19:03:56,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 549 predicate places. [2024-06-21 19:03:56,430 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 506 transitions, 6232 flow [2024-06-21 19:03:56,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:56,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:56,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:56,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 19:03:56,430 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:03:56,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:56,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1312264076, now seen corresponding path program 44 times [2024-06-21 19:03:56,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:56,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173004662] [2024-06-21 19:03:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:56,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173004662] [2024-06-21 19:03:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173004662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:57,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:57,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:03:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720414328] [2024-06-21 19:03:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:57,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:03:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:03:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:03:58,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:03:58,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 506 transitions, 6232 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:58,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:58,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:03:58,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:59,028 INFO L124 PetriNetUnfolderBase]: 1240/2229 cut-off events. [2024-06-21 19:03:59,028 INFO L125 PetriNetUnfolderBase]: For 544329/544329 co-relation queries the response was YES. [2024-06-21 19:03:59,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18260 conditions, 2229 events. 1240/2229 cut-off events. For 544329/544329 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 13952 event pairs, 198 based on Foata normal form. 2/2229 useless extension candidates. Maximal degree in co-relation 17997. Up to 2088 conditions per place. [2024-06-21 19:03:59,063 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 471 selfloop transitions, 50 changer transitions 0/523 dead transitions. [2024-06-21 19:03:59,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 523 transitions, 7345 flow [2024-06-21 19:03:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:03:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:03:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:03:59,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:03:59,064 INFO L175 Difference]: Start difference. First operand has 579 places, 506 transitions, 6232 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:03:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 523 transitions, 7345 flow [2024-06-21 19:04:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 523 transitions, 7184 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 19:04:02,647 INFO L231 Difference]: Finished difference. Result has 580 places, 507 transitions, 6212 flow [2024-06-21 19:04:02,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6212, PETRI_PLACES=580, PETRI_TRANSITIONS=507} [2024-06-21 19:04:02,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 550 predicate places. [2024-06-21 19:04:02,647 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 507 transitions, 6212 flow [2024-06-21 19:04:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 19:04:02,648 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:04:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1478493020, now seen corresponding path program 36 times [2024-06-21 19:04:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157678421] [2024-06-21 19:04:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:04,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157678421] [2024-06-21 19:04:04,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157678421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:04,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:04,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:04:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392718271] [2024-06-21 19:04:04,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:04,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:04:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:04:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:04:04,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:04:04,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 507 transitions, 6212 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:04,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:04,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:04:04,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:05,383 INFO L124 PetriNetUnfolderBase]: 1246/2239 cut-off events. [2024-06-21 19:04:05,383 INFO L125 PetriNetUnfolderBase]: For 544245/544245 co-relation queries the response was YES. [2024-06-21 19:04:05,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2239 events. 1246/2239 cut-off events. For 544245/544245 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 14023 event pairs, 195 based on Foata normal form. 2/2239 useless extension candidates. Maximal degree in co-relation 18059. Up to 2059 conditions per place. [2024-06-21 19:04:05,423 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 457 selfloop transitions, 69 changer transitions 0/528 dead transitions. [2024-06-21 19:04:05,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 528 transitions, 7813 flow [2024-06-21 19:04:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 19:04:05,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 19:04:05,424 INFO L175 Difference]: Start difference. First operand has 580 places, 507 transitions, 6212 flow. Second operand 11 states and 141 transitions. [2024-06-21 19:04:05,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 528 transitions, 7813 flow [2024-06-21 19:04:08,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 528 transitions, 7685 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:04:08,884 INFO L231 Difference]: Finished difference. Result has 581 places, 509 transitions, 6306 flow [2024-06-21 19:04:08,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6086, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6306, PETRI_PLACES=581, PETRI_TRANSITIONS=509} [2024-06-21 19:04:08,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 551 predicate places. [2024-06-21 19:04:08,885 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 509 transitions, 6306 flow [2024-06-21 19:04:08,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:08,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:08,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:08,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 19:04:08,885 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:04:08,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1449839906, now seen corresponding path program 45 times [2024-06-21 19:04:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:08,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300215157] [2024-06-21 19:04:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:10,394 INFO 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 19:04:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300215157] [2024-06-21 19:04:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300215157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:10,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:10,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:04:10,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927165540] [2024-06-21 19:04:10,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:10,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:04:10,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:04:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:04:10,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:04:10,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 509 transitions, 6306 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:10,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:10,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:04:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:11,456 INFO L124 PetriNetUnfolderBase]: 1250/2247 cut-off events. [2024-06-21 19:04:11,456 INFO L125 PetriNetUnfolderBase]: For 544977/544977 co-relation queries the response was YES. [2024-06-21 19:04:11,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18409 conditions, 2247 events. 1250/2247 cut-off events. For 544977/544977 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 14103 event pairs, 205 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 18146. Up to 2126 conditions per place. [2024-06-21 19:04:11,490 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 471 selfloop transitions, 52 changer transitions 0/525 dead transitions. [2024-06-21 19:04:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 525 transitions, 7423 flow [2024-06-21 19:04:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:04:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:04:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 19:04:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 19:04:11,491 INFO L175 Difference]: Start difference. First operand has 581 places, 509 transitions, 6306 flow. Second operand 10 states and 128 transitions. [2024-06-21 19:04:11,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 525 transitions, 7423 flow [2024-06-21 19:04:14,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 525 transitions, 7210 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-21 19:04:14,887 INFO L231 Difference]: Finished difference. Result has 581 places, 510 transitions, 6240 flow [2024-06-21 19:04:14,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6240, PETRI_PLACES=581, PETRI_TRANSITIONS=510} [2024-06-21 19:04:14,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 551 predicate places. [2024-06-21 19:04:14,887 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 510 transitions, 6240 flow [2024-06-21 19:04:14,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:14,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:14,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 19:04:14,887 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:04:14,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1311305990, now seen corresponding path program 37 times [2024-06-21 19:04:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814065352] [2024-06-21 19:04:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:16,591 INFO 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 19:04:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814065352] [2024-06-21 19:04:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814065352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:16,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:16,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:04:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867010799] [2024-06-21 19:04:16,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:04:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:04:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:04:16,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:04:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 510 transitions, 6240 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:04:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:17,705 INFO L124 PetriNetUnfolderBase]: 1246/2241 cut-off events. [2024-06-21 19:04:17,705 INFO L125 PetriNetUnfolderBase]: For 503809/503809 co-relation queries the response was YES. [2024-06-21 19:04:17,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17785 conditions, 2241 events. 1246/2241 cut-off events. For 503809/503809 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 14044 event pairs, 205 based on Foata normal form. 2/2241 useless extension candidates. Maximal degree in co-relation 17523. Up to 2096 conditions per place. [2024-06-21 19:04:17,746 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 466 selfloop transitions, 60 changer transitions 0/528 dead transitions. [2024-06-21 19:04:17,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 528 transitions, 7367 flow [2024-06-21 19:04:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 19:04:17,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 19:04:17,747 INFO L175 Difference]: Start difference. First operand has 581 places, 510 transitions, 6240 flow. Second operand 11 states and 138 transitions. [2024-06-21 19:04:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 528 transitions, 7367 flow [2024-06-21 19:04:20,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 528 transitions, 7185 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 19:04:20,768 INFO L231 Difference]: Finished difference. Result has 583 places, 510 transitions, 6186 flow [2024-06-21 19:04:20,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6186, PETRI_PLACES=583, PETRI_TRANSITIONS=510} [2024-06-21 19:04:20,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 553 predicate places. [2024-06-21 19:04:20,768 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 510 transitions, 6186 flow [2024-06-21 19:04:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:20,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:20,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-21 19:04:20,769 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:04:20,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1478497856, now seen corresponding path program 46 times [2024-06-21 19:04:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664036012] [2024-06-21 19:04:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:22,581 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 19:04:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664036012] [2024-06-21 19:04:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664036012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:22,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:22,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:04:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939654931] [2024-06-21 19:04:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:04:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:04:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:04:22,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:04:22,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 510 transitions, 6186 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:22,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:22,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:04:22,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:23,731 INFO L124 PetriNetUnfolderBase]: 1243/2236 cut-off events. [2024-06-21 19:04:23,731 INFO L125 PetriNetUnfolderBase]: For 463040/463040 co-relation queries the response was YES. [2024-06-21 19:04:23,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17238 conditions, 2236 events. 1243/2236 cut-off events. For 463040/463040 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 14046 event pairs, 192 based on Foata normal form. 2/2236 useless extension candidates. Maximal degree in co-relation 16975. Up to 2055 conditions per place. [2024-06-21 19:04:23,767 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 461 selfloop transitions, 65 changer transitions 0/528 dead transitions. [2024-06-21 19:04:23,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 528 transitions, 7293 flow [2024-06-21 19:04:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:04:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:04:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 19:04:23,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 19:04:23,768 INFO L175 Difference]: Start difference. First operand has 583 places, 510 transitions, 6186 flow. Second operand 11 states and 141 transitions. [2024-06-21 19:04:23,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 528 transitions, 7293 flow Killed by 15