./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix055.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix055.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:58:22,755 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:58:22,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:58:22,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:58:22,827 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:58:22,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:58:22,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:58:22,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:58:22,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:58:22,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:58:22,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:58:22,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:58:22,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:58:22,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:58:22,872 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:58:22,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:58:22,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:58:22,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:58:22,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:58:22,873 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:58:22,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:58:22,874 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:58:22,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:58:22,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:58:22,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:58:22,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:58:22,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:58:22,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:58:22,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:58:22,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:58:22,877 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:58:23,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:58:23,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:58:23,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:58:23,071 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:58:23,072 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:58:23,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix055.opt.yml/witness.yml [2024-06-27 23:58:23,193 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:58:23,194 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:58:23,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-27 23:58:24,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:58:24,356 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:58:24,357 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-27 23:58:24,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a7f8622/5f8049310767492999c0f1ea5041cd4a/FLAG4d8f21128 [2024-06-27 23:58:24,384 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a7f8622/5f8049310767492999c0f1ea5041cd4a [2024-06-27 23:58:24,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:58:24,385 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:58:24,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:58:24,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:58:24,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:58:24,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:58:23" (1/2) ... [2024-06-27 23:58:24,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dda0def and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:58:24, skipping insertion in model container [2024-06-27 23:58:24,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:58:23" (1/2) ... [2024-06-27 23:58:24,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43f22ec9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:58:24, skipping insertion in model container [2024-06-27 23:58:24,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:58:24" (2/2) ... [2024-06-27 23:58:24,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dda0def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24, skipping insertion in model container [2024-06-27 23:58:24,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:58:24" (2/2) ... [2024-06-27 23:58:24,397 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:58:24,424 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:58:24,425 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p3_EAX) + (long long )a >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EAX) - (long long )a >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$r_buff1_thd4 >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd4 - (long long )z$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) [2024-06-27 23:58:24,425 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p3_EAX) + (long long )a >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EAX) - (long long )a >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$r_buff1_thd4 >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd4 - (long long )z$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) [2024-06-27 23:58:24,425 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p3_EAX) + (long long )a >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EAX) - (long long )a >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$r_buff1_thd4 >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd4 - (long long )z$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) [2024-06-27 23:58:24,425 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p3_EAX) + (long long )a >= 0LL) && (0LL - (long long )z$r_buff0_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd4) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff0_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$r_buff1_thd4 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p3_EAX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p3_EAX) - (long long )a >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$r_buff1_thd4 >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd4 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd4 - (long long )z$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) [2024-06-27 23:58:24,426 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:58:24,426 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 23:58:24,458 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:58:24,705 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:58:24,720 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:58:24,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:58:24,905 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:58:24,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24 WrapperNode [2024-06-27 23:58:24,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:58:24,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:58:24,907 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:58:24,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:58:24,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:24,939 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:24,987 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-27 23:58:24,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:58:24,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:58:24,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:58:24,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:58:24,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:24,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,014 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,036 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:58:25,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,041 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:58:25,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:58:25,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:58:25,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:58:25,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (1/1) ... [2024-06-27 23:58:25,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:58:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:58:25,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:58:25,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:58:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:58:25,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:58:25,144 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:58:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:58:25,144 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:58:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:58:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:58:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:58:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 23:58:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 23:58:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:58:25,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:58:25,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:58:25,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:58:25,148 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:58:25,284 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:58:25,286 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:58:25,666 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:58:25,666 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:58:25,816 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:58:25,817 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:58:25,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:58:25 BoogieIcfgContainer [2024-06-27 23:58:25,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:58:25,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:58:25,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:58:25,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:58:25,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:58:23" (1/4) ... [2024-06-27 23:58:25,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376bee77 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:58:25, skipping insertion in model container [2024-06-27 23:58:25,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:58:24" (2/4) ... [2024-06-27 23:58:25,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376bee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:58:25, skipping insertion in model container [2024-06-27 23:58:25,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:58:24" (3/4) ... [2024-06-27 23:58:25,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376bee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:58:25, skipping insertion in model container [2024-06-27 23:58:25,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:58:25" (4/4) ... [2024-06-27 23:58:25,825 INFO L112 eAbstractionObserver]: Analyzing ICFG mix055.opt.i [2024-06-27 23:58:25,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:58:25,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 23:58:25,838 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:58:25,884 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:58:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 23:58:25,936 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-27 23:58:25,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:58:25,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:58:25,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 23:58:25,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-27 23:58:25,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:58:25,951 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;@3441a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:58:25,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 23:58:25,954 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:58:25,954 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:58:25,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:58:25,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:25,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:58:25,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:25,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 381650207, now seen corresponding path program 1 times [2024-06-27 23:58:25,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:25,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283405621] [2024-06-27 23:58:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:25,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283405621] [2024-06-27 23:58:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283405621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:58:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742758874] [2024-06-27 23:58:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:27,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:58:27,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:58:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:58:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 23:58:27,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:27,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:27,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 23:58:27,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:28,311 INFO L124 PetriNetUnfolderBase]: 6742/9488 cut-off events. [2024-06-27 23:58:28,312 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 23:58:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19040 conditions, 9488 events. 6742/9488 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 52197 event pairs, 5078 based on Foata normal form. 1/9317 useless extension candidates. Maximal degree in co-relation 19027. Up to 9223 conditions per place. [2024-06-27 23:58:28,365 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-27 23:58:28,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 223 flow [2024-06-27 23:58:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:58:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:58:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 23:58:28,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-27 23:58:28,377 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 95 transitions. [2024-06-27 23:58:28,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 223 flow [2024-06-27 23:58:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 23:58:28,382 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-27 23:58:28,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 23:58:28,386 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-27 23:58:28,387 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-27 23:58:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:28,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:28,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:28,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:58:28,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:28,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1693662526, now seen corresponding path program 1 times [2024-06-27 23:58:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:28,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798070481] [2024-06-27 23:58:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:29,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798070481] [2024-06-27 23:58:29,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798070481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:29,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:29,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:58:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758747580] [2024-06-27 23:58:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:58:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:58:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:58:29,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 23:58:29,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-27 23:58:29,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:29,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 23:58:29,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:30,356 INFO L124 PetriNetUnfolderBase]: 7882/10803 cut-off events. [2024-06-27 23:58:30,357 INFO L125 PetriNetUnfolderBase]: For 2137/2147 co-relation queries the response was YES. [2024-06-27 23:58:30,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24841 conditions, 10803 events. 7882/10803 cut-off events. For 2137/2147 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 57139 event pairs, 5323 based on Foata normal form. 7/10800 useless extension candidates. Maximal degree in co-relation 24829. Up to 10713 conditions per place. [2024-06-27 23:58:30,424 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-27 23:58:30,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-27 23:58:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:58:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:58:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 23:58:30,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-06-27 23:58:30,428 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 121 transitions. [2024-06-27 23:58:30,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-27 23:58:30,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:58:30,431 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-27 23:58:30,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 23:58:30,432 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-27 23:58:30,433 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-27 23:58:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-27 23:58:30,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:30,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:58:30,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:30,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash 963931870, now seen corresponding path program 1 times [2024-06-27 23:58:30,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:30,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288668254] [2024-06-27 23:58:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:31,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:31,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288668254] [2024-06-27 23:58:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288668254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:31,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:31,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:58:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614787326] [2024-06-27 23:58:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:58:31,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:58:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:58:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 23:58:31,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:31,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:31,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 23:58:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:32,239 INFO L124 PetriNetUnfolderBase]: 7900/10846 cut-off events. [2024-06-27 23:58:32,240 INFO L125 PetriNetUnfolderBase]: For 5964/5984 co-relation queries the response was YES. [2024-06-27 23:58:32,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27876 conditions, 10846 events. 7900/10846 cut-off events. For 5964/5984 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 57251 event pairs, 4136 based on Foata normal form. 11/10847 useless extension candidates. Maximal degree in co-relation 27862. Up to 10634 conditions per place. [2024-06-27 23:58:32,301 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-27 23:58:32,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 533 flow [2024-06-27 23:58:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:58:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:58:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-27 23:58:32,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-27 23:58:32,306 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 159 transitions. [2024-06-27 23:58:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 533 flow [2024-06-27 23:58:32,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 514 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 23:58:32,312 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-27 23:58:32,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-27 23:58:32,313 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 23:58:32,313 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-27 23:58:32,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:32,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:32,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:58:32,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1376156069, now seen corresponding path program 1 times [2024-06-27 23:58:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:32,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784817841] [2024-06-27 23:58:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:33,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784817841] [2024-06-27 23:58:33,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784817841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:33,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:33,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:58:33,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430106762] [2024-06-27 23:58:33,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:33,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:58:33,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:58:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:58:33,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 23:58:33,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:33,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:33,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 23:58:33,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:34,499 INFO L124 PetriNetUnfolderBase]: 7929/10889 cut-off events. [2024-06-27 23:58:34,499 INFO L125 PetriNetUnfolderBase]: For 14421/14466 co-relation queries the response was YES. [2024-06-27 23:58:34,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 10889 events. 7929/10889 cut-off events. For 14421/14466 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 57557 event pairs, 3334 based on Foata normal form. 24/10903 useless extension candidates. Maximal degree in co-relation 32778. Up to 10599 conditions per place. [2024-06-27 23:58:34,571 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 77 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-27 23:58:34,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 678 flow [2024-06-27 23:58:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:58:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:58:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 23:58:34,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-06-27 23:58:34,574 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 184 transitions. [2024-06-27 23:58:34,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 678 flow [2024-06-27 23:58:34,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 666 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 23:58:34,585 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-27 23:58:34,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 23:58:34,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-27 23:58:34,587 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-27 23:58:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:34,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:58:34,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:34,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1949603560, now seen corresponding path program 1 times [2024-06-27 23:58:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443020603] [2024-06-27 23:58:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443020603] [2024-06-27 23:58:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443020603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:35,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:35,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:58:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807539697] [2024-06-27 23:58:35,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:35,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:58:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:58:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:58:35,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-27 23:58:35,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-27 23:58:35,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:35,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-27 23:58:35,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:36,719 INFO L124 PetriNetUnfolderBase]: 6770/9586 cut-off events. [2024-06-27 23:58:36,719 INFO L125 PetriNetUnfolderBase]: For 18497/18516 co-relation queries the response was YES. [2024-06-27 23:58:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31352 conditions, 9586 events. 6770/9586 cut-off events. For 18497/18516 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 52943 event pairs, 3368 based on Foata normal form. 12/9593 useless extension candidates. Maximal degree in co-relation 31331. Up to 9250 conditions per place. [2024-06-27 23:58:36,792 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 64 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-27 23:58:36,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 593 flow [2024-06-27 23:58:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:58:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:58:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 23:58:36,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-06-27 23:58:36,794 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 126 transitions. [2024-06-27 23:58:36,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 593 flow [2024-06-27 23:58:36,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:58:36,802 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 370 flow [2024-06-27 23:58:36,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 23:58:36,803 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 23:58:36,803 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 370 flow [2024-06-27 23:58:36,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2024-06-27 23:58:36,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:36,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:58:36,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:36,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -334949474, now seen corresponding path program 1 times [2024-06-27 23:58:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404762915] [2024-06-27 23:58:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:38,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:38,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404762915] [2024-06-27 23:58:38,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404762915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:38,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:58:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658386330] [2024-06-27 23:58:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:38,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:58:38,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:58:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:58:38,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:58:38,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:38,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:38,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:58:38,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:39,475 INFO L124 PetriNetUnfolderBase]: 8203/11478 cut-off events. [2024-06-27 23:58:39,475 INFO L125 PetriNetUnfolderBase]: For 25503/25506 co-relation queries the response was YES. [2024-06-27 23:58:39,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37667 conditions, 11478 events. 8203/11478 cut-off events. For 25503/25506 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 63518 event pairs, 3605 based on Foata normal form. 7/11480 useless extension candidates. Maximal degree in co-relation 37642. Up to 11111 conditions per place. [2024-06-27 23:58:39,530 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 76 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-27 23:58:39,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 710 flow [2024-06-27 23:58:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:58:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:58:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 23:58:39,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934640522875817 [2024-06-27 23:58:39,532 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 370 flow. Second operand 6 states and 151 transitions. [2024-06-27 23:58:39,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 710 flow [2024-06-27 23:58:39,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 686 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:58:39,544 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 470 flow [2024-06-27 23:58:39,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-27 23:58:39,547 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-27 23:58:39,547 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 470 flow [2024-06-27 23:58:39,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:39,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:39,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:39,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:58:39,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:39,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219115, now seen corresponding path program 1 times [2024-06-27 23:58:39,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:39,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107330139] [2024-06-27 23:58:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107330139] [2024-06-27 23:58:40,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107330139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:40,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:40,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:58:40,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824839612] [2024-06-27 23:58:40,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:58:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:58:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:58:40,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:58:40,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 470 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:40,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:40,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:58:40,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:42,176 INFO L124 PetriNetUnfolderBase]: 9066/12470 cut-off events. [2024-06-27 23:58:42,176 INFO L125 PetriNetUnfolderBase]: For 45789/45865 co-relation queries the response was YES. [2024-06-27 23:58:42,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46455 conditions, 12470 events. 9066/12470 cut-off events. For 45789/45865 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67269 event pairs, 4494 based on Foata normal form. 21/12277 useless extension candidates. Maximal degree in co-relation 46428. Up to 12052 conditions per place. [2024-06-27 23:58:42,260 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 82 selfloop transitions, 38 changer transitions 0/128 dead transitions. [2024-06-27 23:58:42,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 128 transitions, 998 flow [2024-06-27 23:58:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:58:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:58:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 23:58:42,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-06-27 23:58:42,261 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 470 flow. Second operand 6 states and 160 transitions. [2024-06-27 23:58:42,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 128 transitions, 998 flow [2024-06-27 23:58:42,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 128 transitions, 980 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 23:58:42,285 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 683 flow [2024-06-27 23:58:42,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=683, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-06-27 23:58:42,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2024-06-27 23:58:42,286 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 683 flow [2024-06-27 23:58:42,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:42,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:42,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:42,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:58:42,287 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:42,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash -962566935, now seen corresponding path program 2 times [2024-06-27 23:58:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:42,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088586260] [2024-06-27 23:58:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:43,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088586260] [2024-06-27 23:58:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088586260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:43,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:43,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:58:43,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849475186] [2024-06-27 23:58:43,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:43,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:58:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:43,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:58:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:58:43,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:58:43,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 683 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:43,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:43,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:58:43,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:44,993 INFO L124 PetriNetUnfolderBase]: 8998/12358 cut-off events. [2024-06-27 23:58:44,993 INFO L125 PetriNetUnfolderBase]: For 51654/51742 co-relation queries the response was YES. [2024-06-27 23:58:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 12358 events. 8998/12358 cut-off events. For 51654/51742 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 66285 event pairs, 4495 based on Foata normal form. 49/12190 useless extension candidates. Maximal degree in co-relation 46945. Up to 11969 conditions per place. [2024-06-27 23:58:45,058 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 73 selfloop transitions, 42 changer transitions 0/123 dead transitions. [2024-06-27 23:58:45,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 123 transitions, 1039 flow [2024-06-27 23:58:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:58:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:58:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 23:58:45,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-27 23:58:45,060 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 683 flow. Second operand 6 states and 155 transitions. [2024-06-27 23:58:45,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 123 transitions, 1039 flow [2024-06-27 23:58:45,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 123 transitions, 993 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 23:58:45,079 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 742 flow [2024-06-27 23:58:45,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-27 23:58:45,080 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2024-06-27 23:58:45,080 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 742 flow [2024-06-27 23:58:45,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:45,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:45,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:45,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:58:45,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:45,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash 528725845, now seen corresponding path program 3 times [2024-06-27 23:58:45,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856434980] [2024-06-27 23:58:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:45,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856434980] [2024-06-27 23:58:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856434980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:58:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968813331] [2024-06-27 23:58:45,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:58:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:58:45,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:58:45,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:58:45,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 742 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:45,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:45,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:58:45,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:47,573 INFO L124 PetriNetUnfolderBase]: 9148/12573 cut-off events. [2024-06-27 23:58:47,573 INFO L125 PetriNetUnfolderBase]: For 61066/61129 co-relation queries the response was YES. [2024-06-27 23:58:47,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49254 conditions, 12573 events. 9148/12573 cut-off events. For 61066/61129 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 67643 event pairs, 4460 based on Foata normal form. 41/12411 useless extension candidates. Maximal degree in co-relation 49219. Up to 12104 conditions per place. [2024-06-27 23:58:47,649 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 84 selfloop transitions, 60 changer transitions 0/152 dead transitions. [2024-06-27 23:58:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 152 transitions, 1351 flow [2024-06-27 23:58:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:58:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:58:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 23:58:47,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-27 23:58:47,654 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 742 flow. Second operand 7 states and 177 transitions. [2024-06-27 23:58:47,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 152 transitions, 1351 flow [2024-06-27 23:58:47,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1274 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 23:58:47,689 INFO L231 Difference]: Finished difference. Result has 89 places, 118 transitions, 1071 flow [2024-06-27 23:58:47,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=89, PETRI_TRANSITIONS=118} [2024-06-27 23:58:47,689 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-27 23:58:47,690 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 118 transitions, 1071 flow [2024-06-27 23:58:47,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:47,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:47,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:47,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:58:47,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:47,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash 452133779, now seen corresponding path program 1 times [2024-06-27 23:58:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200453256] [2024-06-27 23:58:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:49,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:49,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200453256] [2024-06-27 23:58:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200453256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368140700] [2024-06-27 23:58:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:49,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:58:49,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 118 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:49,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:49,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:58:49,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:50,681 INFO L124 PetriNetUnfolderBase]: 10270/14087 cut-off events. [2024-06-27 23:58:50,681 INFO L125 PetriNetUnfolderBase]: For 71334/71342 co-relation queries the response was YES. [2024-06-27 23:58:50,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55213 conditions, 14087 events. 10270/14087 cut-off events. For 71334/71342 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 75553 event pairs, 3884 based on Foata normal form. 14/14069 useless extension candidates. Maximal degree in co-relation 55174. Up to 12966 conditions per place. [2024-06-27 23:58:50,778 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 100 selfloop transitions, 78 changer transitions 0/184 dead transitions. [2024-06-27 23:58:50,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 184 transitions, 1877 flow [2024-06-27 23:58:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:58:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:58:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 23:58:50,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 23:58:50,780 INFO L175 Difference]: Start difference. First operand has 89 places, 118 transitions, 1071 flow. Second operand 7 states and 187 transitions. [2024-06-27 23:58:50,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 184 transitions, 1877 flow [2024-06-27 23:58:50,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 1750 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:58:50,878 INFO L231 Difference]: Finished difference. Result has 92 places, 137 transitions, 1301 flow [2024-06-27 23:58:50,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1301, PETRI_PLACES=92, PETRI_TRANSITIONS=137} [2024-06-27 23:58:50,879 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-27 23:58:50,879 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 137 transitions, 1301 flow [2024-06-27 23:58:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:50,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:50,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:50,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:58:50,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 225197899, now seen corresponding path program 2 times [2024-06-27 23:58:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:50,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750536325] [2024-06-27 23:58:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:50,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750536325] [2024-06-27 23:58:52,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750536325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:52,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:52,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242876469] [2024-06-27 23:58:52,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:52,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:52,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:52,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:58:52,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 137 transitions, 1301 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:52,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:52,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:58:52,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:54,106 INFO L124 PetriNetUnfolderBase]: 10362/14204 cut-off events. [2024-06-27 23:58:54,106 INFO L125 PetriNetUnfolderBase]: For 93222/93230 co-relation queries the response was YES. [2024-06-27 23:58:54,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61458 conditions, 14204 events. 10362/14204 cut-off events. For 93222/93230 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76156 event pairs, 3871 based on Foata normal form. 11/14172 useless extension candidates. Maximal degree in co-relation 61417. Up to 13037 conditions per place. [2024-06-27 23:58:54,183 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 98 selfloop transitions, 94 changer transitions 0/198 dead transitions. [2024-06-27 23:58:54,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 198 transitions, 2170 flow [2024-06-27 23:58:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:58:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:58:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 23:58:54,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-27 23:58:54,184 INFO L175 Difference]: Start difference. First operand has 92 places, 137 transitions, 1301 flow. Second operand 7 states and 185 transitions. [2024-06-27 23:58:54,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 198 transitions, 2170 flow [2024-06-27 23:58:54,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 198 transitions, 2130 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 23:58:54,245 INFO L231 Difference]: Finished difference. Result has 98 places, 151 transitions, 1612 flow [2024-06-27 23:58:54,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1612, PETRI_PLACES=98, PETRI_TRANSITIONS=151} [2024-06-27 23:58:54,246 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-06-27 23:58:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 151 transitions, 1612 flow [2024-06-27 23:58:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:54,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:54,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:58:54,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:54,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash 236152765, now seen corresponding path program 3 times [2024-06-27 23:58:54,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:54,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303353087] [2024-06-27 23:58:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:54,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:55,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303353087] [2024-06-27 23:58:55,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303353087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:55,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:55,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:55,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098354608] [2024-06-27 23:58:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:55,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:55,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:55,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:58:55,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 151 transitions, 1612 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:55,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:55,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:58:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:57,302 INFO L124 PetriNetUnfolderBase]: 10415/14273 cut-off events. [2024-06-27 23:58:57,303 INFO L125 PetriNetUnfolderBase]: For 112258/112266 co-relation queries the response was YES. [2024-06-27 23:58:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65048 conditions, 14273 events. 10415/14273 cut-off events. For 112258/112266 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76351 event pairs, 3871 based on Foata normal form. 11/14242 useless extension candidates. Maximal degree in co-relation 65003. Up to 13086 conditions per place. [2024-06-27 23:58:57,398 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 89 selfloop transitions, 110 changer transitions 0/205 dead transitions. [2024-06-27 23:58:57,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 205 transitions, 2453 flow [2024-06-27 23:58:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:58:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:58:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 23:58:57,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-27 23:58:57,399 INFO L175 Difference]: Start difference. First operand has 98 places, 151 transitions, 1612 flow. Second operand 7 states and 185 transitions. [2024-06-27 23:58:57,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 205 transitions, 2453 flow [2024-06-27 23:58:57,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 205 transitions, 2427 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 23:58:57,486 INFO L231 Difference]: Finished difference. Result has 105 places, 162 transitions, 1975 flow [2024-06-27 23:58:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1975, PETRI_PLACES=105, PETRI_TRANSITIONS=162} [2024-06-27 23:58:57,487 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-27 23:58:57,487 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 162 transitions, 1975 flow [2024-06-27 23:58:57,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:57,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:57,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:58:57,488 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:58:57,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -789366177, now seen corresponding path program 4 times [2024-06-27 23:58:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555924200] [2024-06-27 23:58:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:58,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555924200] [2024-06-27 23:58:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555924200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:58,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:58:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914713512] [2024-06-27 23:58:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:58:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:58:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:58:58,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:58:58,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 162 transitions, 1975 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:58,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:58,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:58:58,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:00,489 INFO L124 PetriNetUnfolderBase]: 10744/14774 cut-off events. [2024-06-27 23:59:00,489 INFO L125 PetriNetUnfolderBase]: For 131614/131628 co-relation queries the response was YES. [2024-06-27 23:59:00,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70530 conditions, 14774 events. 10744/14774 cut-off events. For 131614/131628 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79943 event pairs, 3839 based on Foata normal form. 17/14779 useless extension candidates. Maximal degree in co-relation 70480. Up to 13343 conditions per place. [2024-06-27 23:59:00,608 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 123 selfloop transitions, 130 changer transitions 0/259 dead transitions. [2024-06-27 23:59:00,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 259 transitions, 3470 flow [2024-06-27 23:59:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 23:59:00,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-06-27 23:59:00,610 INFO L175 Difference]: Start difference. First operand has 105 places, 162 transitions, 1975 flow. Second operand 8 states and 213 transitions. [2024-06-27 23:59:00,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 259 transitions, 3470 flow [2024-06-27 23:59:00,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 259 transitions, 3197 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:00,730 INFO L231 Difference]: Finished difference. Result has 112 places, 196 transitions, 2504 flow [2024-06-27 23:59:00,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2504, PETRI_PLACES=112, PETRI_TRANSITIONS=196} [2024-06-27 23:59:00,731 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 23:59:00,731 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 196 transitions, 2504 flow [2024-06-27 23:59:00,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:00,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:00,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:00,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:59:00,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:00,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:00,732 INFO L85 PathProgramCache]: Analyzing trace with hash 204888187, now seen corresponding path program 1 times [2024-06-27 23:59:00,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:00,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379203098] [2024-06-27 23:59:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:02,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379203098] [2024-06-27 23:59:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379203098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154936894] [2024-06-27 23:59:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:02,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:02,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 196 transitions, 2504 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:02,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:02,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:02,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:04,125 INFO L124 PetriNetUnfolderBase]: 10756/14792 cut-off events. [2024-06-27 23:59:04,126 INFO L125 PetriNetUnfolderBase]: For 148533/148538 co-relation queries the response was YES. [2024-06-27 23:59:04,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72249 conditions, 14792 events. 10756/14792 cut-off events. For 148533/148538 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79852 event pairs, 3798 based on Foata normal form. 12/14799 useless extension candidates. Maximal degree in co-relation 72195. Up to 14440 conditions per place. [2024-06-27 23:59:04,215 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 204 selfloop transitions, 25 changer transitions 0/235 dead transitions. [2024-06-27 23:59:04,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 235 transitions, 3200 flow [2024-06-27 23:59:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 23:59:04,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-06-27 23:59:04,217 INFO L175 Difference]: Start difference. First operand has 112 places, 196 transitions, 2504 flow. Second operand 8 states and 180 transitions. [2024-06-27 23:59:04,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 235 transitions, 3200 flow [2024-06-27 23:59:04,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 235 transitions, 3031 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 23:59:04,329 INFO L231 Difference]: Finished difference. Result has 118 places, 200 transitions, 2466 flow [2024-06-27 23:59:04,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2466, PETRI_PLACES=118, PETRI_TRANSITIONS=200} [2024-06-27 23:59:04,330 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-27 23:59:04,330 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 200 transitions, 2466 flow [2024-06-27 23:59:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:04,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:04,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:04,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:59:04,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:04,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1822308571, now seen corresponding path program 1 times [2024-06-27 23:59:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120988013] [2024-06-27 23:59:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:05,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120988013] [2024-06-27 23:59:05,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120988013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:05,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:05,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60681358] [2024-06-27 23:59:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:05,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:05,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:05,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:05,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 200 transitions, 2466 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:05,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:05,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:05,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:07,630 INFO L124 PetriNetUnfolderBase]: 10930/15069 cut-off events. [2024-06-27 23:59:07,630 INFO L125 PetriNetUnfolderBase]: For 172749/172777 co-relation queries the response was YES. [2024-06-27 23:59:07,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75586 conditions, 15069 events. 10930/15069 cut-off events. For 172749/172777 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 81606 event pairs, 3905 based on Foata normal form. 33/15068 useless extension candidates. Maximal degree in co-relation 75530. Up to 13517 conditions per place. [2024-06-27 23:59:07,745 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 114 selfloop transitions, 143 changer transitions 0/263 dead transitions. [2024-06-27 23:59:07,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 263 transitions, 3626 flow [2024-06-27 23:59:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 23:59:07,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210084033613446 [2024-06-27 23:59:07,747 INFO L175 Difference]: Start difference. First operand has 118 places, 200 transitions, 2466 flow. Second operand 7 states and 186 transitions. [2024-06-27 23:59:07,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 263 transitions, 3626 flow [2024-06-27 23:59:07,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 263 transitions, 3525 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:07,855 INFO L231 Difference]: Finished difference. Result has 119 places, 218 transitions, 2935 flow [2024-06-27 23:59:07,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2935, PETRI_PLACES=119, PETRI_TRANSITIONS=218} [2024-06-27 23:59:07,855 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-27 23:59:07,855 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 218 transitions, 2935 flow [2024-06-27 23:59:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:07,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:07,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:59:07,856 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:07,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -102016409, now seen corresponding path program 2 times [2024-06-27 23:59:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093546534] [2024-06-27 23:59:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:07,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:09,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:09,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093546534] [2024-06-27 23:59:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093546534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:09,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:09,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321827457] [2024-06-27 23:59:09,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:09,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:09,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:09,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 218 transitions, 2935 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:11,333 INFO L124 PetriNetUnfolderBase]: 10900/15042 cut-off events. [2024-06-27 23:59:11,334 INFO L125 PetriNetUnfolderBase]: For 199674/199700 co-relation queries the response was YES. [2024-06-27 23:59:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78995 conditions, 15042 events. 10900/15042 cut-off events. For 199674/199700 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 81601 event pairs, 3906 based on Foata normal form. 31/15039 useless extension candidates. Maximal degree in co-relation 78938. Up to 13491 conditions per place. [2024-06-27 23:59:11,454 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 116 selfloop transitions, 144 changer transitions 0/266 dead transitions. [2024-06-27 23:59:11,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 266 transitions, 3915 flow [2024-06-27 23:59:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 23:59:11,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 23:59:11,456 INFO L175 Difference]: Start difference. First operand has 119 places, 218 transitions, 2935 flow. Second operand 7 states and 187 transitions. [2024-06-27 23:59:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 266 transitions, 3915 flow [2024-06-27 23:59:11,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 266 transitions, 3688 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:11,643 INFO L231 Difference]: Finished difference. Result has 124 places, 219 transitions, 3100 flow [2024-06-27 23:59:11,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3100, PETRI_PLACES=124, PETRI_TRANSITIONS=219} [2024-06-27 23:59:11,644 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 23:59:11,644 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 219 transitions, 3100 flow [2024-06-27 23:59:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:11,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:11,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:59:11,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:11,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2056291359, now seen corresponding path program 3 times [2024-06-27 23:59:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320704355] [2024-06-27 23:59:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:11,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:12,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320704355] [2024-06-27 23:59:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320704355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:12,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:12,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145560769] [2024-06-27 23:59:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:12,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:12,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 219 transitions, 3100 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:14,878 INFO L124 PetriNetUnfolderBase]: 10933/15108 cut-off events. [2024-06-27 23:59:14,879 INFO L125 PetriNetUnfolderBase]: For 224966/225086 co-relation queries the response was YES. [2024-06-27 23:59:14,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81214 conditions, 15108 events. 10933/15108 cut-off events. For 224966/225086 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 82219 event pairs, 3974 based on Foata normal form. 90/15126 useless extension candidates. Maximal degree in co-relation 81153. Up to 13531 conditions per place. [2024-06-27 23:59:15,005 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 109 selfloop transitions, 158 changer transitions 0/273 dead transitions. [2024-06-27 23:59:15,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 273 transitions, 4162 flow [2024-06-27 23:59:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:59:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:59:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 23:59:15,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-27 23:59:15,013 INFO L175 Difference]: Start difference. First operand has 124 places, 219 transitions, 3100 flow. Second operand 7 states and 179 transitions. [2024-06-27 23:59:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 273 transitions, 4162 flow [2024-06-27 23:59:15,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 273 transitions, 3983 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:15,163 INFO L231 Difference]: Finished difference. Result has 129 places, 233 transitions, 3533 flow [2024-06-27 23:59:15,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3533, PETRI_PLACES=129, PETRI_TRANSITIONS=233} [2024-06-27 23:59:15,164 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-27 23:59:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 233 transitions, 3533 flow [2024-06-27 23:59:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:15,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:15,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:59:15,165 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:15,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2129729085, now seen corresponding path program 4 times [2024-06-27 23:59:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972432567] [2024-06-27 23:59:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972432567] [2024-06-27 23:59:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972432567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:16,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:16,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:16,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909250318] [2024-06-27 23:59:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:16,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:16,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 233 transitions, 3533 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:16,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:16,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:18,190 INFO L124 PetriNetUnfolderBase]: 11111/15368 cut-off events. [2024-06-27 23:59:18,190 INFO L125 PetriNetUnfolderBase]: For 258439/258514 co-relation queries the response was YES. [2024-06-27 23:59:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86257 conditions, 15368 events. 11111/15368 cut-off events. For 258439/258514 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 83898 event pairs, 3839 based on Foata normal form. 74/15430 useless extension candidates. Maximal degree in co-relation 86192. Up to 13673 conditions per place. [2024-06-27 23:59:18,340 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 137 selfloop transitions, 181 changer transitions 0/324 dead transitions. [2024-06-27 23:59:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 324 transitions, 5322 flow [2024-06-27 23:59:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 23:59:18,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-06-27 23:59:18,342 INFO L175 Difference]: Start difference. First operand has 129 places, 233 transitions, 3533 flow. Second operand 8 states and 210 transitions. [2024-06-27 23:59:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 324 transitions, 5322 flow [2024-06-27 23:59:18,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 324 transitions, 5063 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:18,592 INFO L231 Difference]: Finished difference. Result has 135 places, 259 transitions, 4137 flow [2024-06-27 23:59:18,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4137, PETRI_PLACES=135, PETRI_TRANSITIONS=259} [2024-06-27 23:59:18,592 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-06-27 23:59:18,592 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 259 transitions, 4137 flow [2024-06-27 23:59:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:18,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:18,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:59:18,593 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:18,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash 361235987, now seen corresponding path program 5 times [2024-06-27 23:59:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301183609] [2024-06-27 23:59:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:19,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301183609] [2024-06-27 23:59:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301183609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:19,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:19,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967442157] [2024-06-27 23:59:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:19,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 259 transitions, 4137 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:19,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:19,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:19,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:21,715 INFO L124 PetriNetUnfolderBase]: 11315/15681 cut-off events. [2024-06-27 23:59:21,716 INFO L125 PetriNetUnfolderBase]: For 293435/293467 co-relation queries the response was YES. [2024-06-27 23:59:21,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89950 conditions, 15681 events. 11315/15681 cut-off events. For 293435/293467 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 85800 event pairs, 3883 based on Foata normal form. 33/15702 useless extension candidates. Maximal degree in co-relation 89883. Up to 13827 conditions per place. [2024-06-27 23:59:21,856 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 139 selfloop transitions, 208 changer transitions 0/353 dead transitions. [2024-06-27 23:59:21,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 353 transitions, 6056 flow [2024-06-27 23:59:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 23:59:21,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-27 23:59:21,863 INFO L175 Difference]: Start difference. First operand has 135 places, 259 transitions, 4137 flow. Second operand 8 states and 211 transitions. [2024-06-27 23:59:21,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 353 transitions, 6056 flow [2024-06-27 23:59:22,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 353 transitions, 5714 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 23:59:22,323 INFO L231 Difference]: Finished difference. Result has 141 places, 294 transitions, 5018 flow [2024-06-27 23:59:22,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=141, PETRI_TRANSITIONS=294} [2024-06-27 23:59:22,323 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 87 predicate places. [2024-06-27 23:59:22,323 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 294 transitions, 5018 flow [2024-06-27 23:59:22,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:22,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:22,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:22,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:59:22,324 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:22,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1088032045, now seen corresponding path program 1 times [2024-06-27 23:59:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347098481] [2024-06-27 23:59:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347098481] [2024-06-27 23:59:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347098481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:59:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650913240] [2024-06-27 23:59:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:59:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:59:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:59:23,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:59:23,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 294 transitions, 5018 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 23:59:23,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:23,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:59:23,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:25,293 INFO L124 PetriNetUnfolderBase]: 9906/14184 cut-off events. [2024-06-27 23:59:25,293 INFO L125 PetriNetUnfolderBase]: For 278343/278345 co-relation queries the response was YES. [2024-06-27 23:59:25,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82386 conditions, 14184 events. 9906/14184 cut-off events. For 278343/278345 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 80168 event pairs, 3756 based on Foata normal form. 4/14184 useless extension candidates. Maximal degree in co-relation 82316. Up to 13413 conditions per place. [2024-06-27 23:59:25,428 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 297 selfloop transitions, 16 changer transitions 0/320 dead transitions. [2024-06-27 23:59:25,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 320 transitions, 5804 flow [2024-06-27 23:59:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:59:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:59:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 23:59:25,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-27 23:59:25,430 INFO L175 Difference]: Start difference. First operand has 141 places, 294 transitions, 5018 flow. Second operand 6 states and 139 transitions. [2024-06-27 23:59:25,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 320 transitions, 5804 flow [2024-06-27 23:59:25,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 320 transitions, 5487 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:59:25,782 INFO L231 Difference]: Finished difference. Result has 143 places, 302 transitions, 4865 flow [2024-06-27 23:59:25,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4865, PETRI_PLACES=143, PETRI_TRANSITIONS=302} [2024-06-27 23:59:25,782 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2024-06-27 23:59:25,782 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 302 transitions, 4865 flow [2024-06-27 23:59:25,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 23:59:25,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:25,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:25,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:59:25,783 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:25,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash 590651352, now seen corresponding path program 1 times [2024-06-27 23:59:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620066748] [2024-06-27 23:59:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:27,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:27,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620066748] [2024-06-27 23:59:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620066748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:27,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:27,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010133289] [2024-06-27 23:59:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:27,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:59:27,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 302 transitions, 4865 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:27,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:27,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:59:27,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:29,437 INFO L124 PetriNetUnfolderBase]: 10916/15158 cut-off events. [2024-06-27 23:59:29,438 INFO L125 PetriNetUnfolderBase]: For 340469/342059 co-relation queries the response was YES. [2024-06-27 23:59:29,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89913 conditions, 15158 events. 10916/15158 cut-off events. For 340469/342059 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 83449 event pairs, 3874 based on Foata normal form. 135/14926 useless extension candidates. Maximal degree in co-relation 89841. Up to 14173 conditions per place. [2024-06-27 23:59:29,547 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 240 selfloop transitions, 72 changer transitions 0/337 dead transitions. [2024-06-27 23:59:29,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 337 transitions, 5645 flow [2024-06-27 23:59:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 23:59:29,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2024-06-27 23:59:29,548 INFO L175 Difference]: Start difference. First operand has 143 places, 302 transitions, 4865 flow. Second operand 8 states and 189 transitions. [2024-06-27 23:59:29,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 337 transitions, 5645 flow [2024-06-27 23:59:29,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 337 transitions, 5592 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:59:29,829 INFO L231 Difference]: Finished difference. Result has 148 places, 305 transitions, 5014 flow [2024-06-27 23:59:29,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5014, PETRI_PLACES=148, PETRI_TRANSITIONS=305} [2024-06-27 23:59:29,829 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-27 23:59:29,829 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 305 transitions, 5014 flow [2024-06-27 23:59:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:59:29,830 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:29,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash 590590902, now seen corresponding path program 2 times [2024-06-27 23:59:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:29,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618733738] [2024-06-27 23:59:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:31,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618733738] [2024-06-27 23:59:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618733738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:31,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962939484] [2024-06-27 23:59:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:31,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:31,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:59:31,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 305 transitions, 5014 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:31,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:31,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:59:31,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:33,343 INFO L124 PetriNetUnfolderBase]: 11027/15337 cut-off events. [2024-06-27 23:59:33,344 INFO L125 PetriNetUnfolderBase]: For 374651/376287 co-relation queries the response was YES. [2024-06-27 23:59:33,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93912 conditions, 15337 events. 11027/15337 cut-off events. For 374651/376287 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 84883 event pairs, 3866 based on Foata normal form. 102/15084 useless extension candidates. Maximal degree in co-relation 93838. Up to 14186 conditions per place. [2024-06-27 23:59:33,482 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 249 selfloop transitions, 71 changer transitions 0/345 dead transitions. [2024-06-27 23:59:33,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 345 transitions, 5818 flow [2024-06-27 23:59:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 23:59:33,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2024-06-27 23:59:33,484 INFO L175 Difference]: Start difference. First operand has 148 places, 305 transitions, 5014 flow. Second operand 8 states and 190 transitions. [2024-06-27 23:59:33,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 345 transitions, 5818 flow [2024-06-27 23:59:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 345 transitions, 5648 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:33,886 INFO L231 Difference]: Finished difference. Result has 151 places, 312 transitions, 5085 flow [2024-06-27 23:59:33,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5085, PETRI_PLACES=151, PETRI_TRANSITIONS=312} [2024-06-27 23:59:33,886 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-27 23:59:33,887 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 312 transitions, 5085 flow [2024-06-27 23:59:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:33,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:33,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:33,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:59:33,887 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:33,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1132640198, now seen corresponding path program 1 times [2024-06-27 23:59:33,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:33,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760163970] [2024-06-27 23:59:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:35,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760163970] [2024-06-27 23:59:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760163970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:35,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:35,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61734378] [2024-06-27 23:59:35,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:35,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:35,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 312 transitions, 5085 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:35,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:37,946 INFO L124 PetriNetUnfolderBase]: 11843/16418 cut-off events. [2024-06-27 23:59:37,947 INFO L125 PetriNetUnfolderBase]: For 419169/419204 co-relation queries the response was YES. [2024-06-27 23:59:38,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102763 conditions, 16418 events. 11843/16418 cut-off events. For 419169/419204 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 90608 event pairs, 3493 based on Foata normal form. 80/16459 useless extension candidates. Maximal degree in co-relation 102688. Up to 14202 conditions per place. [2024-06-27 23:59:38,102 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 155 selfloop transitions, 208 changer transitions 0/369 dead transitions. [2024-06-27 23:59:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 369 transitions, 6395 flow [2024-06-27 23:59:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 23:59:38,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48366013071895425 [2024-06-27 23:59:38,103 INFO L175 Difference]: Start difference. First operand has 151 places, 312 transitions, 5085 flow. Second operand 9 states and 222 transitions. [2024-06-27 23:59:38,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 369 transitions, 6395 flow [2024-06-27 23:59:38,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 369 transitions, 6234 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 23:59:38,566 INFO L231 Difference]: Finished difference. Result has 155 places, 316 transitions, 5436 flow [2024-06-27 23:59:38,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5436, PETRI_PLACES=155, PETRI_TRANSITIONS=316} [2024-06-27 23:59:38,566 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 101 predicate places. [2024-06-27 23:59:38,566 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 316 transitions, 5436 flow [2024-06-27 23:59:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:38,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:38,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:59:38,567 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:38,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -679468710, now seen corresponding path program 2 times [2024-06-27 23:59:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:38,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58755922] [2024-06-27 23:59:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58755922] [2024-06-27 23:59:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58755922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030447626] [2024-06-27 23:59:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:40,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:40,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 316 transitions, 5436 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:40,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:40,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:40,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:42,741 INFO L124 PetriNetUnfolderBase]: 11906/16504 cut-off events. [2024-06-27 23:59:42,741 INFO L125 PetriNetUnfolderBase]: For 445462/445506 co-relation queries the response was YES. [2024-06-27 23:59:42,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107757 conditions, 16504 events. 11906/16504 cut-off events. For 445462/445506 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 90732 event pairs, 3775 based on Foata normal form. 52/16482 useless extension candidates. Maximal degree in co-relation 107681. Up to 14619 conditions per place. [2024-06-27 23:59:42,927 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 134 selfloop transitions, 230 changer transitions 0/370 dead transitions. [2024-06-27 23:59:42,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 370 transitions, 6666 flow [2024-06-27 23:59:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 23:59:42,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684095860566449 [2024-06-27 23:59:42,929 INFO L175 Difference]: Start difference. First operand has 155 places, 316 transitions, 5436 flow. Second operand 9 states and 215 transitions. [2024-06-27 23:59:42,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 370 transitions, 6666 flow [2024-06-27 23:59:43,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 370 transitions, 6177 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:43,897 INFO L231 Difference]: Finished difference. Result has 157 places, 320 transitions, 5505 flow [2024-06-27 23:59:43,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=157, PETRI_TRANSITIONS=320} [2024-06-27 23:59:43,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-06-27 23:59:43,898 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 320 transitions, 5505 flow [2024-06-27 23:59:43,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:43,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:43,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:43,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:59:43,898 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:43,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -918301666, now seen corresponding path program 3 times [2024-06-27 23:59:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:43,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532958028] [2024-06-27 23:59:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:43,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:45,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:45,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532958028] [2024-06-27 23:59:45,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532958028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:45,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:45,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:45,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372142073] [2024-06-27 23:59:45,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:45,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:45,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:45,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:45,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 320 transitions, 5505 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:45,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:45,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:45,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:48,677 INFO L124 PetriNetUnfolderBase]: 11969/16589 cut-off events. [2024-06-27 23:59:48,677 INFO L125 PetriNetUnfolderBase]: For 487559/487579 co-relation queries the response was YES. [2024-06-27 23:59:48,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110645 conditions, 16589 events. 11969/16589 cut-off events. For 487559/487579 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 91168 event pairs, 3797 based on Foata normal form. 28/16543 useless extension candidates. Maximal degree in co-relation 110569. Up to 14697 conditions per place. [2024-06-27 23:59:48,819 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 152 selfloop transitions, 221 changer transitions 0/379 dead transitions. [2024-06-27 23:59:48,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 379 transitions, 6927 flow [2024-06-27 23:59:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 23:59:48,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-27 23:59:48,821 INFO L175 Difference]: Start difference. First operand has 157 places, 320 transitions, 5505 flow. Second operand 9 states and 216 transitions. [2024-06-27 23:59:48,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 379 transitions, 6927 flow [2024-06-27 23:59:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 379 transitions, 6403 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:49,275 INFO L231 Difference]: Finished difference. Result has 159 places, 324 transitions, 5530 flow [2024-06-27 23:59:49,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5530, PETRI_PLACES=159, PETRI_TRANSITIONS=324} [2024-06-27 23:59:49,276 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-27 23:59:49,276 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 324 transitions, 5530 flow [2024-06-27 23:59:49,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:49,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:49,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:49,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:59:49,277 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:49,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -681829636, now seen corresponding path program 4 times [2024-06-27 23:59:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:49,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986402119] [2024-06-27 23:59:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:50,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:50,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986402119] [2024-06-27 23:59:50,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986402119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:50,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846792670] [2024-06-27 23:59:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 23:59:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 324 transitions, 5530 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:51,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:51,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 23:59:51,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:54,298 INFO L124 PetriNetUnfolderBase]: 12395/17204 cut-off events. [2024-06-27 23:59:54,299 INFO L125 PetriNetUnfolderBase]: For 556033/556077 co-relation queries the response was YES. [2024-06-27 23:59:54,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118676 conditions, 17204 events. 12395/17204 cut-off events. For 556033/556077 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 95521 event pairs, 2926 based on Foata normal form. 52/17181 useless extension candidates. Maximal degree in co-relation 118599. Up to 14359 conditions per place. [2024-06-27 23:59:54,445 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 133 selfloop transitions, 249 changer transitions 0/388 dead transitions. [2024-06-27 23:59:54,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 388 transitions, 7084 flow [2024-06-27 23:59:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 23:59:54,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48366013071895425 [2024-06-27 23:59:54,446 INFO L175 Difference]: Start difference. First operand has 159 places, 324 transitions, 5530 flow. Second operand 9 states and 222 transitions. [2024-06-27 23:59:54,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 388 transitions, 7084 flow [2024-06-27 23:59:54,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 388 transitions, 6504 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 23:59:54,985 INFO L231 Difference]: Finished difference. Result has 161 places, 332 transitions, 5693 flow [2024-06-27 23:59:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5693, PETRI_PLACES=161, PETRI_TRANSITIONS=332} [2024-06-27 23:59:54,986 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 107 predicate places. [2024-06-27 23:59:54,986 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 332 transitions, 5693 flow [2024-06-27 23:59:54,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:54,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:54,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:54,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:59:54,986 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:54,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash -163086664, now seen corresponding path program 3 times [2024-06-27 23:59:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:54,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195315543] [2024-06-27 23:59:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:56,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195315543] [2024-06-27 23:59:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195315543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:56,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:56,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:59:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234909005] [2024-06-27 23:59:56,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:59:56,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:59:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:59:56,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 23:59:56,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 332 transitions, 5693 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:56,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:56,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 23:59:56,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:58,999 INFO L124 PetriNetUnfolderBase]: 12197/17019 cut-off events. [2024-06-27 23:59:58,999 INFO L125 PetriNetUnfolderBase]: For 636297/640862 co-relation queries the response was YES. [2024-06-27 23:59:59,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122795 conditions, 17019 events. 12197/17019 cut-off events. For 636297/640862 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 96380 event pairs, 3840 based on Foata normal form. 206/16797 useless extension candidates. Maximal degree in co-relation 122717. Up to 15678 conditions per place. [2024-06-27 23:59:59,156 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 282 selfloop transitions, 83 changer transitions 0/395 dead transitions. [2024-06-27 23:59:59,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 395 transitions, 6927 flow [2024-06-27 23:59:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 23:59:59,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:59:59,157 INFO L175 Difference]: Start difference. First operand has 161 places, 332 transitions, 5693 flow. Second operand 8 states and 204 transitions. [2024-06-27 23:59:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 395 transitions, 6927 flow [2024-06-27 23:59:59,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 395 transitions, 6383 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:59,779 INFO L231 Difference]: Finished difference. Result has 164 places, 351 transitions, 5600 flow [2024-06-27 23:59:59,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5600, PETRI_PLACES=164, PETRI_TRANSITIONS=351} [2024-06-27 23:59:59,779 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-27 23:59:59,779 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 351 transitions, 5600 flow [2024-06-27 23:59:59,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:59,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:59,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:59,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:59:59,780 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 23:59:59,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 507247354, now seen corresponding path program 4 times [2024-06-27 23:59:59,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779568895] [2024-06-27 23:59:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779568895] [2024-06-28 00:00:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779568895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:00,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:00:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515469572] [2024-06-28 00:00:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:00,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:00:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:00:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:00:01,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-28 00:00:01,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 351 transitions, 5600 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:01,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:01,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-28 00:00:01,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:04,214 INFO L124 PetriNetUnfolderBase]: 12206/17021 cut-off events. [2024-06-28 00:00:04,215 INFO L125 PetriNetUnfolderBase]: For 668194/672716 co-relation queries the response was YES. [2024-06-28 00:00:04,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123536 conditions, 17021 events. 12206/17021 cut-off events. For 668194/672716 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 96179 event pairs, 3825 based on Foata normal form. 246/16843 useless extension candidates. Maximal degree in co-relation 123456. Up to 15920 conditions per place. [2024-06-28 00:00:04,405 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 286 selfloop transitions, 77 changer transitions 0/393 dead transitions. [2024-06-28 00:00:04,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 393 transitions, 6477 flow [2024-06-28 00:00:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 00:00:04,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-28 00:00:04,407 INFO L175 Difference]: Start difference. First operand has 164 places, 351 transitions, 5600 flow. Second operand 8 states and 200 transitions. [2024-06-28 00:00:04,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 393 transitions, 6477 flow [2024-06-28 00:00:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 393 transitions, 6364 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 00:00:05,108 INFO L231 Difference]: Finished difference. Result has 170 places, 354 transitions, 5692 flow [2024-06-28 00:00:05,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5692, PETRI_PLACES=170, PETRI_TRANSITIONS=354} [2024-06-28 00:00:05,109 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 116 predicate places. [2024-06-28 00:00:05,109 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 354 transitions, 5692 flow [2024-06-28 00:00:05,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:05,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:05,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:05,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:00:05,110 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:00:05,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -905275878, now seen corresponding path program 5 times [2024-06-28 00:00:05,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95784671] [2024-06-28 00:00:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:06,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95784671] [2024-06-28 00:00:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95784671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:06,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:06,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:00:06,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530426770] [2024-06-28 00:00:06,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:00:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:00:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:00:06,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-06-28 00:00:06,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 354 transitions, 5692 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:06,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:06,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-06-28 00:00:06,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:09,147 INFO L124 PetriNetUnfolderBase]: 9102/13831 cut-off events. [2024-06-28 00:00:09,147 INFO L125 PetriNetUnfolderBase]: For 582290/586346 co-relation queries the response was YES. [2024-06-28 00:00:09,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103689 conditions, 13831 events. 9102/13831 cut-off events. For 582290/586346 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 88190 event pairs, 2202 based on Foata normal form. 332/13533 useless extension candidates. Maximal degree in co-relation 103606. Up to 10749 conditions per place. [2024-06-28 00:00:09,319 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 183 selfloop transitions, 115 changer transitions 0/404 dead transitions. [2024-06-28 00:00:09,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 404 transitions, 6572 flow [2024-06-28 00:00:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:00:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:00:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 00:00:09,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546218487394958 [2024-06-28 00:00:09,330 INFO L175 Difference]: Start difference. First operand has 170 places, 354 transitions, 5692 flow. Second operand 7 states and 198 transitions. [2024-06-28 00:00:09,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 404 transitions, 6572 flow [2024-06-28 00:00:09,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 404 transitions, 6436 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:00:09,873 INFO L231 Difference]: Finished difference. Result has 173 places, 372 transitions, 6117 flow [2024-06-28 00:00:09,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6117, PETRI_PLACES=173, PETRI_TRANSITIONS=372} [2024-06-28 00:00:09,876 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 119 predicate places. [2024-06-28 00:00:09,876 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 372 transitions, 6117 flow [2024-06-28 00:00:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:00:09,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:09,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:00:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:00:09,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 00:00:09,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1655131204, now seen corresponding path program 5 times [2024-06-28 00:00:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:09,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305960766] [2024-06-28 00:00:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat