./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:48:13,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:48:13,953 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:48:13,957 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:48:13,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:48:13,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:48:13,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:48:13,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:48:13,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:48:13,979 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:48:13,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:48:13,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:48:13,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:48:13,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:48:13,981 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:48:13,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:48:13,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:48:13,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:48:13,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:48:13,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:48:13,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:48:13,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:48:13,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:48:13,988 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:48:13,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:48:13,989 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:48:13,989 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:48:13,990 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:48:13,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:48:13,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:48:13,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:48:13,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:48:13,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:13,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:48:13,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:48:13,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:48:13,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:48:13,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:48:13,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:48:13,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:48:13,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:48:14,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:48:14,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:48:14,004 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:48:14,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:48:14,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:48:14,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:48:14,219 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:48:14,220 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:48:14,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 18:48:14,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:48:14,338 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:48:14,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:15,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:48:15,764 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:48:15,764 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:15,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c2e9818/1c7142133a864efeba58943487aa8bd2/FLAG487af5579 [2024-06-21 18:48:15,800 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c2e9818/1c7142133a864efeba58943487aa8bd2 [2024-06-21 18:48:15,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:48:15,802 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:48:15,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:15,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:48:15,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:48:15,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:14" (1/2) ... [2024-06-21 18:48:15,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3942af1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:15, skipping insertion in model container [2024-06-21 18:48:15,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:14" (1/2) ... [2024-06-21 18:48:15,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31962e6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:48:15, skipping insertion in model container [2024-06-21 18:48:15,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:15" (2/2) ... [2024-06-21 18:48:15,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3942af1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:15, skipping insertion in model container [2024-06-21 18:48:15,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:48:15" (2/2) ... [2024-06-21 18:48:15,819 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:48:15,854 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:48:15,855 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:48:15,856 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:48:15,856 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 18:48:15,856 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:48:15,856 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-21 18:48:15,921 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:48:16,268 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:16,280 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:48:16,418 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:48:16,456 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:48:16,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16 WrapperNode [2024-06-21 18:48:16,457 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:48:16,458 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:16,458 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:48:16,458 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:48:16,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,521 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 18:48:16,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:48:16,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:48:16,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:48:16,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:48:16,536 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,539 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,557 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:48:16,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:48:16,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:48:16,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:48:16,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:48:16,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (1/1) ... [2024-06-21 18:48:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:48:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:48:16,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:48:16,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:48:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:48:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:48:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:48:16,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:48:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:48:16,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:48:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:48:16,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:48:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:48:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:48:16,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:48:16,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:48:16,681 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:48:16,809 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:48:16,811 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:48:17,279 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:48:17,280 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:48:17,467 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:48:17,467 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:48:17,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:17 BoogieIcfgContainer [2024-06-21 18:48:17,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:48:17,470 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:48:17,470 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:48:17,473 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:48:17,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:48:14" (1/4) ... [2024-06-21 18:48:17,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd8b5f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:48:15" (2/4) ... [2024-06-21 18:48:17,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd8b5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:48:16" (3/4) ... [2024-06-21 18:48:17,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd8b5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:48:17, skipping insertion in model container [2024-06-21 18:48:17,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:48:17" (4/4) ... [2024-06-21 18:48:17,476 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:48:17,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:48:17,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:48:17,493 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:48:17,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:48:17,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:48:17,609 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 18:48:17,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:17,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:48:17,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:48:17,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 18:48:17,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:48:17,639 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;@4e46e95e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:48:17,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:48:17,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:48:17,646 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:48:17,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:48:17,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:17,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:48:17,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:17,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash 372680172, now seen corresponding path program 1 times [2024-06-21 18:48:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:17,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427665304] [2024-06-21 18:48:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427665304] [2024-06-21 18:48:19,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427665304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:19,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:19,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:48:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222394469] [2024-06-21 18:48:19,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:48:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:48:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:48:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:48:19,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:19,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:19,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:48:19,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:19,576 INFO L124 PetriNetUnfolderBase]: 1407/2237 cut-off events. [2024-06-21 18:48:19,576 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 18:48:19,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4441 conditions, 2237 events. 1407/2237 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11042 event pairs, 989 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 4429. Up to 2105 conditions per place. [2024-06-21 18:48:19,596 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 18:48:19,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 18:48:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:48:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:48:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 18:48:19,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 18:48:19,613 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-21 18:48:19,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 18:48:19,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:19,620 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 18:48:19,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 18:48:19,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 18:48:19,625 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 18:48:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:48:19,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:19,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1663882633, now seen corresponding path program 1 times [2024-06-21 18:48:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079080300] [2024-06-21 18:48:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079080300] [2024-06-21 18:48:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079080300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:20,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:48:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824491148] [2024-06-21 18:48:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:20,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:48:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:48:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:48:20,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:20,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:20,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:20,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:20,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:20,915 INFO L124 PetriNetUnfolderBase]: 1653/2528 cut-off events. [2024-06-21 18:48:20,915 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-21 18:48:20,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2528 events. 1653/2528 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12068 event pairs, 1038 based on Foata normal form. 3/2519 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-21 18:48:20,930 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 18:48:20,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-21 18:48:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:48:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:48:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-21 18:48:20,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 18:48:20,935 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-21 18:48:20,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-21 18:48:20,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:48:20,939 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 18:48:20,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 18:48:20,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 18:48:20,940 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 18:48:20,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:20,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:20,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:48:20,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:20,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 40755157, now seen corresponding path program 1 times [2024-06-21 18:48:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082740000] [2024-06-21 18:48:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082740000] [2024-06-21 18:48:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082740000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:21,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:21,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335299456] [2024-06-21 18:48:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:21,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:21,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:21,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:21,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:22,202 INFO L124 PetriNetUnfolderBase]: 1641/2510 cut-off events. [2024-06-21 18:48:22,202 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-21 18:48:22,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6286 conditions, 2510 events. 1641/2510 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11890 event pairs, 746 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 6272. Up to 2393 conditions per place. [2024-06-21 18:48:22,218 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-21 18:48:22,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 322 flow [2024-06-21 18:48:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-21 18:48:22,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-21 18:48:22,220 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 111 transitions. [2024-06-21 18:48:22,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 322 flow [2024-06-21 18:48:22,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:22,223 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-21 18:48:22,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 18:48:22,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 18:48:22,224 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-21 18:48:22,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:22,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:22,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:22,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:48:22,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:22,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1204929134, now seen corresponding path program 1 times [2024-06-21 18:48:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:22,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587300959] [2024-06-21 18:48:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:22,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:23,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587300959] [2024-06-21 18:48:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587300959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:23,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:23,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:23,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200634155] [2024-06-21 18:48:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:23,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:48:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:23,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:48:23,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:24,097 INFO L124 PetriNetUnfolderBase]: 1632/2495 cut-off events. [2024-06-21 18:48:24,098 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-06-21 18:48:24,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2495 events. 1632/2495 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11828 event pairs, 582 based on Foata normal form. 6/2489 useless extension candidates. Maximal degree in co-relation 6822. Up to 2348 conditions per place. [2024-06-21 18:48:24,114 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 18:48:24,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 376 flow [2024-06-21 18:48:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 18:48:24,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-21 18:48:24,119 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 127 transitions. [2024-06-21 18:48:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 376 flow [2024-06-21 18:48:24,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 352 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:24,124 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-21 18:48:24,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 18:48:24,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 18:48:24,126 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-21 18:48:24,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:24,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:24,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:24,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:48:24,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:24,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1788486672, now seen corresponding path program 1 times [2024-06-21 18:48:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11926147] [2024-06-21 18:48:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:25,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11926147] [2024-06-21 18:48:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11926147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:25,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:25,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030283918] [2024-06-21 18:48:25,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:25,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:25,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:25,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:25,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:25,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:25,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:25,676 INFO L124 PetriNetUnfolderBase]: 1375/2177 cut-off events. [2024-06-21 18:48:25,677 INFO L125 PetriNetUnfolderBase]: For 3336/3336 co-relation queries the response was YES. [2024-06-21 18:48:25,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 2177 events. 1375/2177 cut-off events. For 3336/3336 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10651 event pairs, 917 based on Foata normal form. 2/2126 useless extension candidates. Maximal degree in co-relation 6281. Up to 2047 conditions per place. [2024-06-21 18:48:25,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-21 18:48:25,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 347 flow [2024-06-21 18:48:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 18:48:25,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 18:48:25,692 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 91 transitions. [2024-06-21 18:48:25,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 347 flow [2024-06-21 18:48:25,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 312 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:25,696 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 221 flow [2024-06-21 18:48:25,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-21 18:48:25,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-21 18:48:25,697 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 221 flow [2024-06-21 18:48:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:25,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:25,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:25,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:48:25,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:25,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash 391489018, now seen corresponding path program 1 times [2024-06-21 18:48:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374761403] [2024-06-21 18:48:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:26,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374761403] [2024-06-21 18:48:26,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374761403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:26,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:26,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188339198] [2024-06-21 18:48:26,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:26,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:26,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:26,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:26,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:26,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:26,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:26,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:27,505 INFO L124 PetriNetUnfolderBase]: 1629/2518 cut-off events. [2024-06-21 18:48:27,506 INFO L125 PetriNetUnfolderBase]: For 5343/5343 co-relation queries the response was YES. [2024-06-21 18:48:27,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7778 conditions, 2518 events. 1629/2518 cut-off events. For 5343/5343 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12126 event pairs, 1065 based on Foata normal form. 3/2521 useless extension candidates. Maximal degree in co-relation 7758. Up to 2382 conditions per place. [2024-06-21 18:48:27,529 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 51 selfloop transitions, 19 changer transitions 0/74 dead transitions. [2024-06-21 18:48:27,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 475 flow [2024-06-21 18:48:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 18:48:27,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 18:48:27,532 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 221 flow. Second operand 7 states and 116 transitions. [2024-06-21 18:48:27,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 475 flow [2024-06-21 18:48:27,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 453 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:27,538 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 328 flow [2024-06-21 18:48:27,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-21 18:48:27,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-21 18:48:27,541 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 328 flow [2024-06-21 18:48:27,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:27,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:27,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:27,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:48:27,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:27,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash 836640915, now seen corresponding path program 1 times [2024-06-21 18:48:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:27,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180491096] [2024-06-21 18:48:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:28,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:28,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180491096] [2024-06-21 18:48:28,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180491096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:28,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:28,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998797944] [2024-06-21 18:48:28,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:28,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:28,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:28,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:28,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:28,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:28,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:28,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:29,136 INFO L124 PetriNetUnfolderBase]: 1769/2686 cut-off events. [2024-06-21 18:48:29,137 INFO L125 PetriNetUnfolderBase]: For 8517/8527 co-relation queries the response was YES. [2024-06-21 18:48:29,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9308 conditions, 2686 events. 1769/2686 cut-off events. For 8517/8527 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12866 event pairs, 1054 based on Foata normal form. 2/2652 useless extension candidates. Maximal degree in co-relation 9284. Up to 2578 conditions per place. [2024-06-21 18:48:29,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-21 18:48:29,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 584 flow [2024-06-21 18:48:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 18:48:29,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 18:48:29,167 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 328 flow. Second operand 7 states and 120 transitions. [2024-06-21 18:48:29,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 584 flow [2024-06-21 18:48:29,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 565 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:29,176 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 412 flow [2024-06-21 18:48:29,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-21 18:48:29,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-21 18:48:29,178 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 412 flow [2024-06-21 18:48:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:29,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:29,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:48:29,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:29,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -740913053, now seen corresponding path program 2 times [2024-06-21 18:48:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:29,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140914280] [2024-06-21 18:48:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:30,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140914280] [2024-06-21 18:48:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140914280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:30,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:30,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496980900] [2024-06-21 18:48:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:30,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:30,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:30,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:30,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:30,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:30,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:30,838 INFO L124 PetriNetUnfolderBase]: 1794/2723 cut-off events. [2024-06-21 18:48:30,839 INFO L125 PetriNetUnfolderBase]: For 11231/11243 co-relation queries the response was YES. [2024-06-21 18:48:30,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10177 conditions, 2723 events. 1794/2723 cut-off events. For 11231/11243 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13040 event pairs, 1055 based on Foata normal form. 2/2689 useless extension candidates. Maximal degree in co-relation 10150. Up to 2607 conditions per place. [2024-06-21 18:48:30,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 23 changer transitions 0/90 dead transitions. [2024-06-21 18:48:30,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 713 flow [2024-06-21 18:48:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 18:48:30,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 18:48:30,858 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 412 flow. Second operand 7 states and 113 transitions. [2024-06-21 18:48:30,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 713 flow [2024-06-21 18:48:30,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 644 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:30,871 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 506 flow [2024-06-21 18:48:30,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-21 18:48:30,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 18:48:30,873 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 506 flow [2024-06-21 18:48:30,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:30,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:30,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:30,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:48:30,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:30,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1164333683, now seen corresponding path program 3 times [2024-06-21 18:48:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:30,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527368940] [2024-06-21 18:48:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527368940] [2024-06-21 18:48:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527368940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:31,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558076019] [2024-06-21 18:48:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:32,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:32,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 506 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:32,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:32,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:32,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:32,621 INFO L124 PetriNetUnfolderBase]: 1789/2717 cut-off events. [2024-06-21 18:48:32,622 INFO L125 PetriNetUnfolderBase]: For 14107/14121 co-relation queries the response was YES. [2024-06-21 18:48:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 2717 events. 1789/2717 cut-off events. For 14107/14121 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13020 event pairs, 1059 based on Foata normal form. 2/2683 useless extension candidates. Maximal degree in co-relation 10680. Up to 2573 conditions per place. [2024-06-21 18:48:32,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 31 changer transitions 0/93 dead transitions. [2024-06-21 18:48:32,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 756 flow [2024-06-21 18:48:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 18:48:32,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 18:48:32,644 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 506 flow. Second operand 7 states and 113 transitions. [2024-06-21 18:48:32,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 756 flow [2024-06-21 18:48:32,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 719 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:32,658 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 581 flow [2024-06-21 18:48:32,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 18:48:32,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 18:48:32,660 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 581 flow [2024-06-21 18:48:32,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:32,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:32,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:32,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:48:32,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:32,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -748741297, now seen corresponding path program 1 times [2024-06-21 18:48:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345551414] [2024-06-21 18:48:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345551414] [2024-06-21 18:48:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345551414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:34,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:34,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130092237] [2024-06-21 18:48:34,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:34,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:48:34,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:34,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:34,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:48:34,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:35,166 INFO L124 PetriNetUnfolderBase]: 1926/2870 cut-off events. [2024-06-21 18:48:35,167 INFO L125 PetriNetUnfolderBase]: For 19038/19038 co-relation queries the response was YES. [2024-06-21 18:48:35,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12091 conditions, 2870 events. 1926/2870 cut-off events. For 19038/19038 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13151 event pairs, 1186 based on Foata normal form. 3/2873 useless extension candidates. Maximal degree in co-relation 12060. Up to 2795 conditions per place. [2024-06-21 18:48:35,187 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 77 selfloop transitions, 23 changer transitions 0/103 dead transitions. [2024-06-21 18:48:35,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 909 flow [2024-06-21 18:48:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 18:48:35,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-21 18:48:35,189 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 581 flow. Second operand 8 states and 125 transitions. [2024-06-21 18:48:35,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 909 flow [2024-06-21 18:48:35,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 103 transitions, 821 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:35,204 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 590 flow [2024-06-21 18:48:35,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-06-21 18:48:35,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-21 18:48:35,206 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 590 flow [2024-06-21 18:48:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:35,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:35,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:48:35,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:35,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash 621707721, now seen corresponding path program 1 times [2024-06-21 18:48:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933405988] [2024-06-21 18:48:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:36,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933405988] [2024-06-21 18:48:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933405988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:36,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:36,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833169330] [2024-06-21 18:48:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:36,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:36,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 590 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:36,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:36,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:36,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:36,888 INFO L124 PetriNetUnfolderBase]: 1797/2741 cut-off events. [2024-06-21 18:48:36,888 INFO L125 PetriNetUnfolderBase]: For 20998/21031 co-relation queries the response was YES. [2024-06-21 18:48:36,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12196 conditions, 2741 events. 1797/2741 cut-off events. For 20998/21031 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12955 event pairs, 722 based on Foata normal form. 11/2737 useless extension candidates. Maximal degree in co-relation 12164. Up to 2535 conditions per place. [2024-06-21 18:48:36,912 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 83 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-06-21 18:48:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 966 flow [2024-06-21 18:48:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:48:36,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:48:36,914 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 590 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:48:36,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 966 flow [2024-06-21 18:48:36,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 899 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:36,934 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 676 flow [2024-06-21 18:48:36,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-21 18:48:36,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 18:48:36,935 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 676 flow [2024-06-21 18:48:36,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:36,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:36,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:36,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:48:36,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:36,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash 152078205, now seen corresponding path program 2 times [2024-06-21 18:48:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863009631] [2024-06-21 18:48:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:37,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863009631] [2024-06-21 18:48:37,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863009631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:37,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:37,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594080839] [2024-06-21 18:48:37,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:37,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:37,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:37,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 676 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:37,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:37,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:38,661 INFO L124 PetriNetUnfolderBase]: 1843/2815 cut-off events. [2024-06-21 18:48:38,661 INFO L125 PetriNetUnfolderBase]: For 24759/24792 co-relation queries the response was YES. [2024-06-21 18:48:38,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13187 conditions, 2815 events. 1843/2815 cut-off events. For 24759/24792 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13272 event pairs, 681 based on Foata normal form. 13/2822 useless extension candidates. Maximal degree in co-relation 13153. Up to 2577 conditions per place. [2024-06-21 18:48:38,683 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 86 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2024-06-21 18:48:38,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1174 flow [2024-06-21 18:48:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:48:38,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:48:38,685 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 676 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:48:38,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1174 flow [2024-06-21 18:48:38,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1099 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:38,703 INFO L231 Difference]: Finished difference. Result has 88 places, 112 transitions, 906 flow [2024-06-21 18:48:38,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=906, PETRI_PLACES=88, PETRI_TRANSITIONS=112} [2024-06-21 18:48:38,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 18:48:38,704 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 112 transitions, 906 flow [2024-06-21 18:48:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:38,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:38,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:38,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:48:38,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:38,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash 165604311, now seen corresponding path program 1 times [2024-06-21 18:48:38,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:38,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814319543] [2024-06-21 18:48:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:38,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814319543] [2024-06-21 18:48:39,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814319543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:39,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:39,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516912998] [2024-06-21 18:48:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:39,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:48:39,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 112 transitions, 906 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:39,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:39,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:48:39,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:40,426 INFO L124 PetriNetUnfolderBase]: 2040/3038 cut-off events. [2024-06-21 18:48:40,427 INFO L125 PetriNetUnfolderBase]: For 31826/31832 co-relation queries the response was YES. [2024-06-21 18:48:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15056 conditions, 3038 events. 2040/3038 cut-off events. For 31826/31832 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14070 event pairs, 934 based on Foata normal form. 9/3047 useless extension candidates. Maximal degree in co-relation 15018. Up to 2928 conditions per place. [2024-06-21 18:48:40,454 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 116 selfloop transitions, 35 changer transitions 0/154 dead transitions. [2024-06-21 18:48:40,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1538 flow [2024-06-21 18:48:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:48:40,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:48:40,456 INFO L175 Difference]: Start difference. First operand has 88 places, 112 transitions, 906 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:48:40,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1538 flow [2024-06-21 18:48:40,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 154 transitions, 1460 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:40,490 INFO L231 Difference]: Finished difference. Result has 94 places, 126 transitions, 1079 flow [2024-06-21 18:48:40,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=94, PETRI_TRANSITIONS=126} [2024-06-21 18:48:40,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 18:48:40,492 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 126 transitions, 1079 flow [2024-06-21 18:48:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:40,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:40,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:40,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:48:40,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:40,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1450588385, now seen corresponding path program 3 times [2024-06-21 18:48:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098392872] [2024-06-21 18:48:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:41,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098392872] [2024-06-21 18:48:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098392872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:41,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:41,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971744669] [2024-06-21 18:48:41,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:41,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:41,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:41,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:41,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:42,259 INFO L124 PetriNetUnfolderBase]: 1948/2946 cut-off events. [2024-06-21 18:48:42,259 INFO L125 PetriNetUnfolderBase]: For 36975/37018 co-relation queries the response was YES. [2024-06-21 18:48:42,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 2946 events. 1948/2946 cut-off events. For 36975/37018 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13790 event pairs, 650 based on Foata normal form. 7/2941 useless extension candidates. Maximal degree in co-relation 15698. Up to 2653 conditions per place. [2024-06-21 18:48:42,282 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 93 selfloop transitions, 53 changer transitions 0/158 dead transitions. [2024-06-21 18:48:42,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 158 transitions, 1609 flow [2024-06-21 18:48:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 18:48:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 18:48:42,285 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 1079 flow. Second operand 8 states and 143 transitions. [2024-06-21 18:48:42,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 158 transitions, 1609 flow [2024-06-21 18:48:42,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 158 transitions, 1540 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:42,318 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1259 flow [2024-06-21 18:48:42,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-21 18:48:42,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 18:48:42,319 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1259 flow [2024-06-21 18:48:42,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:42,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:42,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:42,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:48:42,320 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1742822667, now seen corresponding path program 4 times [2024-06-21 18:48:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618037680] [2024-06-21 18:48:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:43,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:43,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618037680] [2024-06-21 18:48:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618037680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:43,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117326134] [2024-06-21 18:48:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:43,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:43,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1259 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:43,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:43,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:43,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:44,020 INFO L124 PetriNetUnfolderBase]: 1997/3017 cut-off events. [2024-06-21 18:48:44,020 INFO L125 PetriNetUnfolderBase]: For 42606/42650 co-relation queries the response was YES. [2024-06-21 18:48:44,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16905 conditions, 3017 events. 1997/3017 cut-off events. For 42606/42650 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14154 event pairs, 657 based on Foata normal form. 7/3010 useless extension candidates. Maximal degree in co-relation 16863. Up to 2753 conditions per place. [2024-06-21 18:48:44,043 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 51 changer transitions 0/170 dead transitions. [2024-06-21 18:48:44,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 170 transitions, 1856 flow [2024-06-21 18:48:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:48:44,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 18:48:44,045 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1259 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:48:44,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 170 transitions, 1856 flow [2024-06-21 18:48:44,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1759 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:44,088 INFO L231 Difference]: Finished difference. Result has 105 places, 152 transitions, 1538 flow [2024-06-21 18:48:44,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1538, PETRI_PLACES=105, PETRI_TRANSITIONS=152} [2024-06-21 18:48:44,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 18:48:44,089 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 152 transitions, 1538 flow [2024-06-21 18:48:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:44,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:44,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:48:44,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:44,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1911736323, now seen corresponding path program 2 times [2024-06-21 18:48:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200606417] [2024-06-21 18:48:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:45,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200606417] [2024-06-21 18:48:45,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200606417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:45,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:45,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:45,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131649047] [2024-06-21 18:48:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:45,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:45,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:45,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:48:45,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 152 transitions, 1538 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:45,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:45,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:48:45,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:45,811 INFO L124 PetriNetUnfolderBase]: 2185/3246 cut-off events. [2024-06-21 18:48:45,811 INFO L125 PetriNetUnfolderBase]: For 51781/51785 co-relation queries the response was YES. [2024-06-21 18:48:45,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18911 conditions, 3246 events. 2185/3246 cut-off events. For 51781/51785 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15059 event pairs, 928 based on Foata normal form. 7/3253 useless extension candidates. Maximal degree in co-relation 18866. Up to 3117 conditions per place. [2024-06-21 18:48:45,834 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 144 selfloop transitions, 45 changer transitions 0/192 dead transitions. [2024-06-21 18:48:45,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 192 transitions, 2273 flow [2024-06-21 18:48:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 18:48:45,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 18:48:45,837 INFO L175 Difference]: Start difference. First operand has 105 places, 152 transitions, 1538 flow. Second operand 7 states and 122 transitions. [2024-06-21 18:48:45,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 192 transitions, 2273 flow [2024-06-21 18:48:45,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 2198 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 18:48:45,886 INFO L231 Difference]: Finished difference. Result has 111 places, 171 transitions, 1814 flow [2024-06-21 18:48:45,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=111, PETRI_TRANSITIONS=171} [2024-06-21 18:48:45,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-21 18:48:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 171 transitions, 1814 flow [2024-06-21 18:48:45,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:45,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:48:45,888 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:45,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1911736509, now seen corresponding path program 5 times [2024-06-21 18:48:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526682775] [2024-06-21 18:48:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526682775] [2024-06-21 18:48:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526682775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:46,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746504720] [2024-06-21 18:48:46,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:46,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:46,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:47,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 171 transitions, 1814 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:47,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:47,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:47,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:47,626 INFO L124 PetriNetUnfolderBase]: 2113/3181 cut-off events. [2024-06-21 18:48:47,626 INFO L125 PetriNetUnfolderBase]: For 57830/57878 co-relation queries the response was YES. [2024-06-21 18:48:47,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19762 conditions, 3181 events. 2113/3181 cut-off events. For 57830/57878 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14946 event pairs, 659 based on Foata normal form. 7/3174 useless extension candidates. Maximal degree in co-relation 19714. Up to 2851 conditions per place. [2024-06-21 18:48:47,645 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 64 changer transitions 0/203 dead transitions. [2024-06-21 18:48:47,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 203 transitions, 2518 flow [2024-06-21 18:48:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:48:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:48:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 18:48:47,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 18:48:47,647 INFO L175 Difference]: Start difference. First operand has 111 places, 171 transitions, 1814 flow. Second operand 7 states and 130 transitions. [2024-06-21 18:48:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 203 transitions, 2518 flow [2024-06-21 18:48:47,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 2466 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 18:48:47,714 INFO L231 Difference]: Finished difference. Result has 118 places, 183 transitions, 2154 flow [2024-06-21 18:48:47,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2154, PETRI_PLACES=118, PETRI_TRANSITIONS=183} [2024-06-21 18:48:47,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 18:48:47,715 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 183 transitions, 2154 flow [2024-06-21 18:48:47,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:47,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:47,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:48:47,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2092204933, now seen corresponding path program 6 times [2024-06-21 18:48:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094703180] [2024-06-21 18:48:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:48,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094703180] [2024-06-21 18:48:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094703180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:48,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:48,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:48,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111008851] [2024-06-21 18:48:48,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:48,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:48,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:48,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:48,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 183 transitions, 2154 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:48,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:48,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:48,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:49,539 INFO L124 PetriNetUnfolderBase]: 2105/3178 cut-off events. [2024-06-21 18:48:49,540 INFO L125 PetriNetUnfolderBase]: For 65527/65558 co-relation queries the response was YES. [2024-06-21 18:48:49,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20654 conditions, 3178 events. 2105/3178 cut-off events. For 65527/65558 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14949 event pairs, 664 based on Foata normal form. 7/3179 useless extension candidates. Maximal degree in co-relation 20602. Up to 2760 conditions per place. [2024-06-21 18:48:49,565 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 87 changer transitions 0/206 dead transitions. [2024-06-21 18:48:49,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 206 transitions, 2740 flow [2024-06-21 18:48:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:48:49,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:48:49,566 INFO L175 Difference]: Start difference. First operand has 118 places, 183 transitions, 2154 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:48:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 206 transitions, 2740 flow [2024-06-21 18:48:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 2639 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:49,628 INFO L231 Difference]: Finished difference. Result has 123 places, 186 transitions, 2315 flow [2024-06-21 18:48:49,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2315, PETRI_PLACES=123, PETRI_TRANSITIONS=186} [2024-06-21 18:48:49,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 18:48:49,629 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 186 transitions, 2315 flow [2024-06-21 18:48:49,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:49,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:49,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:48:49,630 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:49,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1736388741, now seen corresponding path program 3 times [2024-06-21 18:48:49,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:49,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483040700] [2024-06-21 18:48:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:50,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:50,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483040700] [2024-06-21 18:48:50,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483040700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:50,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258241615] [2024-06-21 18:48:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:50,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:50,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:48:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 186 transitions, 2315 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:48:50,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:51,276 INFO L124 PetriNetUnfolderBase]: 2242/3331 cut-off events. [2024-06-21 18:48:51,277 INFO L125 PetriNetUnfolderBase]: For 77809/77817 co-relation queries the response was YES. [2024-06-21 18:48:51,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22356 conditions, 3331 events. 2242/3331 cut-off events. For 77809/77817 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15514 event pairs, 925 based on Foata normal form. 11/3342 useless extension candidates. Maximal degree in co-relation 22302. Up to 3080 conditions per place. [2024-06-21 18:48:51,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 61 changer transitions 0/217 dead transitions. [2024-06-21 18:48:51,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 3125 flow [2024-06-21 18:48:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 18:48:51,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 18:48:51,301 INFO L175 Difference]: Start difference. First operand has 123 places, 186 transitions, 2315 flow. Second operand 8 states and 131 transitions. [2024-06-21 18:48:51,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 3125 flow [2024-06-21 18:48:51,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 2887 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:51,370 INFO L231 Difference]: Finished difference. Result has 126 places, 194 transitions, 2359 flow [2024-06-21 18:48:51,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2359, PETRI_PLACES=126, PETRI_TRANSITIONS=194} [2024-06-21 18:48:51,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-21 18:48:51,371 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 194 transitions, 2359 flow [2024-06-21 18:48:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:51,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:51,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:48:51,372 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1676627179, now seen corresponding path program 4 times [2024-06-21 18:48:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662341821] [2024-06-21 18:48:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:52,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662341821] [2024-06-21 18:48:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662341821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:52,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:52,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:48:52,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117043404] [2024-06-21 18:48:52,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:48:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:48:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:48:52,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:48:52,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 194 transitions, 2359 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:52,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:52,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:48:52,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:53,291 INFO L124 PetriNetUnfolderBase]: 2244/3334 cut-off events. [2024-06-21 18:48:53,291 INFO L125 PetriNetUnfolderBase]: For 85905/85913 co-relation queries the response was YES. [2024-06-21 18:48:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23093 conditions, 3334 events. 2244/3334 cut-off events. For 85905/85913 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15469 event pairs, 924 based on Foata normal form. 11/3345 useless extension candidates. Maximal degree in co-relation 23037. Up to 3085 conditions per place. [2024-06-21 18:48:53,312 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 140 selfloop transitions, 75 changer transitions 0/218 dead transitions. [2024-06-21 18:48:53,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 218 transitions, 3012 flow [2024-06-21 18:48:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 18:48:53,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 18:48:53,314 INFO L175 Difference]: Start difference. First operand has 126 places, 194 transitions, 2359 flow. Second operand 8 states and 129 transitions. [2024-06-21 18:48:53,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 218 transitions, 3012 flow [2024-06-21 18:48:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 218 transitions, 2834 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:53,376 INFO L231 Difference]: Finished difference. Result has 130 places, 198 transitions, 2423 flow [2024-06-21 18:48:53,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2423, PETRI_PLACES=130, PETRI_TRANSITIONS=198} [2024-06-21 18:48:53,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 18:48:53,377 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 198 transitions, 2423 flow [2024-06-21 18:48:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:53,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:48:53,377 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1734358725, now seen corresponding path program 1 times [2024-06-21 18:48:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71664081] [2024-06-21 18:48:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:54,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71664081] [2024-06-21 18:48:54,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71664081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:54,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:54,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:54,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985496792] [2024-06-21 18:48:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:54,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:54,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:54,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:54,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 198 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:54,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:54,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:54,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:55,653 INFO L124 PetriNetUnfolderBase]: 1995/3086 cut-off events. [2024-06-21 18:48:55,654 INFO L125 PetriNetUnfolderBase]: For 77950/77950 co-relation queries the response was YES. [2024-06-21 18:48:55,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3086 events. 1995/3086 cut-off events. For 77950/77950 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15021 event pairs, 853 based on Foata normal form. 6/3092 useless extension candidates. Maximal degree in co-relation 20844. Up to 2870 conditions per place. [2024-06-21 18:48:55,673 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 196 selfloop transitions, 26 changer transitions 0/226 dead transitions. [2024-06-21 18:48:55,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 226 transitions, 3091 flow [2024-06-21 18:48:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:48:55,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:48:55,675 INFO L175 Difference]: Start difference. First operand has 130 places, 198 transitions, 2423 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:48:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 226 transitions, 3091 flow [2024-06-21 18:48:55,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 226 transitions, 2940 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:55,739 INFO L231 Difference]: Finished difference. Result has 133 places, 201 transitions, 2400 flow [2024-06-21 18:48:55,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2400, PETRI_PLACES=133, PETRI_TRANSITIONS=201} [2024-06-21 18:48:55,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 18:48:55,740 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 201 transitions, 2400 flow [2024-06-21 18:48:55,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:55,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:55,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:48:55,741 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:55,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2061105833, now seen corresponding path program 1 times [2024-06-21 18:48:55,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:55,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317676433] [2024-06-21 18:48:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:55,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:56,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:56,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317676433] [2024-06-21 18:48:56,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317676433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:56,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:56,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:48:56,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828548403] [2024-06-21 18:48:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:56,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:48:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:48:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:48:56,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:56,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 201 transitions, 2400 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:56,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:56,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:56,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:57,239 INFO L124 PetriNetUnfolderBase]: 1992/3081 cut-off events. [2024-06-21 18:48:57,239 INFO L125 PetriNetUnfolderBase]: For 81242/81242 co-relation queries the response was YES. [2024-06-21 18:48:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21133 conditions, 3081 events. 1992/3081 cut-off events. For 81242/81242 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15000 event pairs, 872 based on Foata normal form. 1/3082 useless extension candidates. Maximal degree in co-relation 21075. Up to 2939 conditions per place. [2024-06-21 18:48:57,263 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 194 selfloop transitions, 10 changer transitions 0/208 dead transitions. [2024-06-21 18:48:57,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 208 transitions, 2830 flow [2024-06-21 18:48:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:48:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:48:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 18:48:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 18:48:57,265 INFO L175 Difference]: Start difference. First operand has 133 places, 201 transitions, 2400 flow. Second operand 5 states and 83 transitions. [2024-06-21 18:48:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 208 transitions, 2830 flow [2024-06-21 18:48:57,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 208 transitions, 2714 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:57,341 INFO L231 Difference]: Finished difference. Result has 132 places, 201 transitions, 2312 flow [2024-06-21 18:48:57,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2312, PETRI_PLACES=132, PETRI_TRANSITIONS=201} [2024-06-21 18:48:57,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 18:48:57,342 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 201 transitions, 2312 flow [2024-06-21 18:48:57,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:57,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:57,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:48:57,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:57,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -680197548, now seen corresponding path program 1 times [2024-06-21 18:48:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:57,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623785612] [2024-06-21 18:48:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:58,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623785612] [2024-06-21 18:48:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623785612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:58,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862490596] [2024-06-21 18:48:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:58,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:58,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 201 transitions, 2312 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:58,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:59,089 INFO L124 PetriNetUnfolderBase]: 2218/3326 cut-off events. [2024-06-21 18:48:59,089 INFO L125 PetriNetUnfolderBase]: For 102950/103020 co-relation queries the response was YES. [2024-06-21 18:48:59,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23560 conditions, 3326 events. 2218/3326 cut-off events. For 102950/103020 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15882 event pairs, 825 based on Foata normal form. 11/3303 useless extension candidates. Maximal degree in co-relation 23500. Up to 3005 conditions per place. [2024-06-21 18:48:59,116 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 65 changer transitions 0/243 dead transitions. [2024-06-21 18:48:59,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 243 transitions, 3126 flow [2024-06-21 18:48:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:48:59,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 18:48:59,118 INFO L175 Difference]: Start difference. First operand has 132 places, 201 transitions, 2312 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:48:59,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 243 transitions, 3126 flow [2024-06-21 18:48:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 243 transitions, 3105 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:59,210 INFO L231 Difference]: Finished difference. Result has 137 places, 217 transitions, 2775 flow [2024-06-21 18:48:59,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2775, PETRI_PLACES=137, PETRI_TRANSITIONS=217} [2024-06-21 18:48:59,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 18:48:59,211 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 217 transitions, 2775 flow [2024-06-21 18:48:59,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:59,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:59,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:59,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:48:59,212 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:59,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash 655447237, now seen corresponding path program 1 times [2024-06-21 18:48:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:59,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901236718] [2024-06-21 18:48:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:59,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:00,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901236718] [2024-06-21 18:49:00,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901236718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:00,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:00,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:00,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804064733] [2024-06-21 18:49:00,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:00,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:00,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:00,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 217 transitions, 2775 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:00,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:00,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:00,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:00,807 INFO L124 PetriNetUnfolderBase]: 2334/3456 cut-off events. [2024-06-21 18:49:00,807 INFO L125 PetriNetUnfolderBase]: For 106477/106485 co-relation queries the response was YES. [2024-06-21 18:49:00,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25282 conditions, 3456 events. 2334/3456 cut-off events. For 106477/106485 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15949 event pairs, 706 based on Foata normal form. 11/3467 useless extension candidates. Maximal degree in co-relation 25221. Up to 3206 conditions per place. [2024-06-21 18:49:00,833 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 191 selfloop transitions, 74 changer transitions 0/268 dead transitions. [2024-06-21 18:49:00,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 268 transitions, 3863 flow [2024-06-21 18:49:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:49:00,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:49:00,835 INFO L175 Difference]: Start difference. First operand has 137 places, 217 transitions, 2775 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:49:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 268 transitions, 3863 flow [2024-06-21 18:49:00,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 268 transitions, 3633 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:00,966 INFO L231 Difference]: Finished difference. Result has 142 places, 234 transitions, 3032 flow [2024-06-21 18:49:00,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3032, PETRI_PLACES=142, PETRI_TRANSITIONS=234} [2024-06-21 18:49:00,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 18:49:00,967 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 234 transitions, 3032 flow [2024-06-21 18:49:00,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:00,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:00,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:00,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:49:00,968 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:00,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash 734854386, now seen corresponding path program 2 times [2024-06-21 18:49:00,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712647579] [2024-06-21 18:49:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712647579] [2024-06-21 18:49:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712647579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:02,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:02,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894237073] [2024-06-21 18:49:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:02,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:02,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 234 transitions, 3032 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:02,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:02,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:02,934 INFO L124 PetriNetUnfolderBase]: 2261/3392 cut-off events. [2024-06-21 18:49:02,934 INFO L125 PetriNetUnfolderBase]: For 116727/116737 co-relation queries the response was YES. [2024-06-21 18:49:02,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26005 conditions, 3392 events. 2261/3392 cut-off events. For 116727/116737 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16016 event pairs, 618 based on Foata normal form. 15/3407 useless extension candidates. Maximal degree in co-relation 25942. Up to 3035 conditions per place. [2024-06-21 18:49:02,961 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 72 changer transitions 0/270 dead transitions. [2024-06-21 18:49:02,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 270 transitions, 3810 flow [2024-06-21 18:49:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:49:02,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 18:49:02,962 INFO L175 Difference]: Start difference. First operand has 142 places, 234 transitions, 3032 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:49:02,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 270 transitions, 3810 flow [2024-06-21 18:49:03,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 270 transitions, 3639 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:03,089 INFO L231 Difference]: Finished difference. Result has 148 places, 246 transitions, 3260 flow [2024-06-21 18:49:03,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3260, PETRI_PLACES=148, PETRI_TRANSITIONS=246} [2024-06-21 18:49:03,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 18:49:03,090 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 246 transitions, 3260 flow [2024-06-21 18:49:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:03,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:49:03,090 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:03,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1857097803, now seen corresponding path program 2 times [2024-06-21 18:49:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:03,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70651794] [2024-06-21 18:49:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70651794] [2024-06-21 18:49:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70651794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:04,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207050911] [2024-06-21 18:49:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:04,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:04,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 246 transitions, 3260 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:04,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:04,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:04,823 INFO L124 PetriNetUnfolderBase]: 2446/3614 cut-off events. [2024-06-21 18:49:04,823 INFO L125 PetriNetUnfolderBase]: For 129744/129752 co-relation queries the response was YES. [2024-06-21 18:49:04,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28271 conditions, 3614 events. 2446/3614 cut-off events. For 129744/129752 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16709 event pairs, 671 based on Foata normal form. 11/3625 useless extension candidates. Maximal degree in co-relation 28206. Up to 3333 conditions per place. [2024-06-21 18:49:04,857 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 213 selfloop transitions, 87 changer transitions 0/303 dead transitions. [2024-06-21 18:49:04,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 303 transitions, 4526 flow [2024-06-21 18:49:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 18:49:04,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 18:49:04,859 INFO L175 Difference]: Start difference. First operand has 148 places, 246 transitions, 3260 flow. Second operand 9 states and 158 transitions. [2024-06-21 18:49:04,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 303 transitions, 4526 flow [2024-06-21 18:49:05,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 303 transitions, 4372 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:05,017 INFO L231 Difference]: Finished difference. Result has 155 places, 271 transitions, 3722 flow [2024-06-21 18:49:05,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3722, PETRI_PLACES=155, PETRI_TRANSITIONS=271} [2024-06-21 18:49:05,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 18:49:05,018 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 271 transitions, 3722 flow [2024-06-21 18:49:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:05,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:05,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:05,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:49:05,019 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:05,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 838767378, now seen corresponding path program 1 times [2024-06-21 18:49:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483688777] [2024-06-21 18:49:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:05,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:06,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483688777] [2024-06-21 18:49:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483688777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:06,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355264257] [2024-06-21 18:49:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:06,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:06,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:06,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 271 transitions, 3722 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:06,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:06,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:06,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:07,140 INFO L124 PetriNetUnfolderBase]: 2586/3814 cut-off events. [2024-06-21 18:49:07,140 INFO L125 PetriNetUnfolderBase]: For 150179/150183 co-relation queries the response was YES. [2024-06-21 18:49:07,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31176 conditions, 3814 events. 2586/3814 cut-off events. For 150179/150183 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17761 event pairs, 590 based on Foata normal form. 13/3827 useless extension candidates. Maximal degree in co-relation 31108. Up to 3198 conditions per place. [2024-06-21 18:49:07,174 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 184 selfloop transitions, 133 changer transitions 0/320 dead transitions. [2024-06-21 18:49:07,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 320 transitions, 5056 flow [2024-06-21 18:49:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 18:49:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:49:07,243 INFO L175 Difference]: Start difference. First operand has 155 places, 271 transitions, 3722 flow. Second operand 9 states and 164 transitions. [2024-06-21 18:49:07,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 320 transitions, 5056 flow [2024-06-21 18:49:07,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 320 transitions, 4953 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:07,379 INFO L231 Difference]: Finished difference. Result has 164 places, 286 transitions, 4344 flow [2024-06-21 18:49:07,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4344, PETRI_PLACES=164, PETRI_TRANSITIONS=286} [2024-06-21 18:49:07,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 18:49:07,380 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 286 transitions, 4344 flow [2024-06-21 18:49:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:07,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:07,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:49:07,381 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash 838767161, now seen corresponding path program 3 times [2024-06-21 18:49:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974833572] [2024-06-21 18:49:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:08,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:08,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974833572] [2024-06-21 18:49:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974833572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:08,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:08,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:08,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906913149] [2024-06-21 18:49:08,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:08,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:08,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:08,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 286 transitions, 4344 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:08,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:08,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:08,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:09,269 INFO L124 PetriNetUnfolderBase]: 2604/3840 cut-off events. [2024-06-21 18:49:09,270 INFO L125 PetriNetUnfolderBase]: For 165415/165419 co-relation queries the response was YES. [2024-06-21 18:49:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33662 conditions, 3840 events. 2604/3840 cut-off events. For 165415/165419 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17960 event pairs, 591 based on Foata normal form. 7/3847 useless extension candidates. Maximal degree in co-relation 33590. Up to 3298 conditions per place. [2024-06-21 18:49:09,302 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 186 selfloop transitions, 134 changer transitions 0/323 dead transitions. [2024-06-21 18:49:09,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 323 transitions, 5478 flow [2024-06-21 18:49:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:49:09,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:49:09,303 INFO L175 Difference]: Start difference. First operand has 164 places, 286 transitions, 4344 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:49:09,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 323 transitions, 5478 flow [2024-06-21 18:49:09,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 323 transitions, 5243 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:09,520 INFO L231 Difference]: Finished difference. Result has 168 places, 290 transitions, 4499 flow [2024-06-21 18:49:09,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4499, PETRI_PLACES=168, PETRI_TRANSITIONS=290} [2024-06-21 18:49:09,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 18:49:09,521 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 290 transitions, 4499 flow [2024-06-21 18:49:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:09,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:09,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:09,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:49:09,521 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:09,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 423176976, now seen corresponding path program 3 times [2024-06-21 18:49:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912221965] [2024-06-21 18:49:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:10,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912221965] [2024-06-21 18:49:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912221965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:10,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:10,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561356550] [2024-06-21 18:49:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:10,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:10,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:10,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 290 transitions, 4499 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:10,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:10,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:10,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:11,601 INFO L124 PetriNetUnfolderBase]: 2536/3777 cut-off events. [2024-06-21 18:49:11,601 INFO L125 PetriNetUnfolderBase]: For 169891/169897 co-relation queries the response was YES. [2024-06-21 18:49:11,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33321 conditions, 3777 events. 2536/3777 cut-off events. For 169891/169897 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17960 event pairs, 555 based on Foata normal form. 8/3785 useless extension candidates. Maximal degree in co-relation 33248. Up to 3310 conditions per place. [2024-06-21 18:49:11,633 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 190 selfloop transitions, 94 changer transitions 0/321 dead transitions. [2024-06-21 18:49:11,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 321 transitions, 5277 flow [2024-06-21 18:49:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:49:11,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:49:11,635 INFO L175 Difference]: Start difference. First operand has 168 places, 290 transitions, 4499 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:49:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 321 transitions, 5277 flow [2024-06-21 18:49:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 321 transitions, 4933 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:11,838 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 4464 flow [2024-06-21 18:49:11,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4464, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2024-06-21 18:49:11,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-21 18:49:11,839 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 4464 flow [2024-06-21 18:49:11,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:11,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:11,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:11,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:49:11,840 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:11,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 423177131, now seen corresponding path program 4 times [2024-06-21 18:49:11,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:11,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629373264] [2024-06-21 18:49:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:12,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:12,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629373264] [2024-06-21 18:49:12,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629373264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:12,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:12,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:12,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304586121] [2024-06-21 18:49:12,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:12,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:12,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:12,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:12,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:12,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 4464 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:12,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:12,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:12,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:13,557 INFO L124 PetriNetUnfolderBase]: 2606/3843 cut-off events. [2024-06-21 18:49:13,557 INFO L125 PetriNetUnfolderBase]: For 177610/177614 co-relation queries the response was YES. [2024-06-21 18:49:13,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33867 conditions, 3843 events. 2606/3843 cut-off events. For 177610/177614 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17908 event pairs, 605 based on Foata normal form. 7/3850 useless extension candidates. Maximal degree in co-relation 33793. Up to 3305 conditions per place. [2024-06-21 18:49:13,594 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 210 selfloop transitions, 119 changer transitions 0/332 dead transitions. [2024-06-21 18:49:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 332 transitions, 5675 flow [2024-06-21 18:49:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 18:49:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 18:49:13,595 INFO L175 Difference]: Start difference. First operand has 170 places, 293 transitions, 4464 flow. Second operand 9 states and 161 transitions. [2024-06-21 18:49:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 332 transitions, 5675 flow [2024-06-21 18:49:13,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 332 transitions, 5392 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:13,821 INFO L231 Difference]: Finished difference. Result has 173 places, 299 transitions, 4603 flow [2024-06-21 18:49:13,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4603, PETRI_PLACES=173, PETRI_TRANSITIONS=299} [2024-06-21 18:49:13,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-21 18:49:13,822 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 299 transitions, 4603 flow [2024-06-21 18:49:13,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:13,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:13,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:13,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:49:13,822 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:13,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 861901932, now seen corresponding path program 4 times [2024-06-21 18:49:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142664264] [2024-06-21 18:49:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:14,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:14,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142664264] [2024-06-21 18:49:14,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142664264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:14,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:14,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:14,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329857930] [2024-06-21 18:49:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:14,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:14,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:15,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:15,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 299 transitions, 4603 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:15,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:15,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:15,964 INFO L124 PetriNetUnfolderBase]: 2548/3794 cut-off events. [2024-06-21 18:49:15,964 INFO L125 PetriNetUnfolderBase]: For 187743/187749 co-relation queries the response was YES. [2024-06-21 18:49:15,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33990 conditions, 3794 events. 2548/3794 cut-off events. For 187743/187749 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18037 event pairs, 565 based on Foata normal form. 10/3804 useless extension candidates. Maximal degree in co-relation 33914. Up to 3376 conditions per place. [2024-06-21 18:49:15,995 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 215 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-06-21 18:49:15,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 326 transitions, 5437 flow [2024-06-21 18:49:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:49:15,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:49:15,996 INFO L175 Difference]: Start difference. First operand has 173 places, 299 transitions, 4603 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:49:15,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 326 transitions, 5437 flow [2024-06-21 18:49:16,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 326 transitions, 5154 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:16,231 INFO L231 Difference]: Finished difference. Result has 176 places, 308 transitions, 4714 flow [2024-06-21 18:49:16,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4320, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4714, PETRI_PLACES=176, PETRI_TRANSITIONS=308} [2024-06-21 18:49:16,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 18:49:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 308 transitions, 4714 flow [2024-06-21 18:49:16,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:16,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:16,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:16,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:49:16,232 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:16,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 861992297, now seen corresponding path program 5 times [2024-06-21 18:49:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:16,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497021925] [2024-06-21 18:49:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497021925] [2024-06-21 18:49:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497021925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:17,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:17,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303587690] [2024-06-21 18:49:17,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:17,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:17,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 308 transitions, 4714 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:17,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:17,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:17,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:18,134 INFO L124 PetriNetUnfolderBase]: 2744/4038 cut-off events. [2024-06-21 18:49:18,134 INFO L125 PetriNetUnfolderBase]: For 205201/205205 co-relation queries the response was YES. [2024-06-21 18:49:18,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36535 conditions, 4038 events. 2744/4038 cut-off events. For 205201/205205 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18960 event pairs, 617 based on Foata normal form. 7/4045 useless extension candidates. Maximal degree in co-relation 36458. Up to 3729 conditions per place. [2024-06-21 18:49:18,171 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 264 selfloop transitions, 100 changer transitions 0/367 dead transitions. [2024-06-21 18:49:18,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 367 transitions, 6386 flow [2024-06-21 18:49:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:49:18,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:49:18,173 INFO L175 Difference]: Start difference. First operand has 176 places, 308 transitions, 4714 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:49:18,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 367 transitions, 6386 flow [2024-06-21 18:49:18,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 367 transitions, 6239 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:18,449 INFO L231 Difference]: Finished difference. Result has 182 places, 341 transitions, 5493 flow [2024-06-21 18:49:18,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=182, PETRI_TRANSITIONS=341} [2024-06-21 18:49:18,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 18:49:18,450 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 341 transitions, 5493 flow [2024-06-21 18:49:18,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:18,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:18,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:49:18,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:18,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 865716947, now seen corresponding path program 6 times [2024-06-21 18:49:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223552216] [2024-06-21 18:49:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223552216] [2024-06-21 18:49:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223552216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:19,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:19,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:19,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365587532] [2024-06-21 18:49:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:19,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:19,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:19,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:19,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 341 transitions, 5493 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:19,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:19,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:19,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:20,325 INFO L124 PetriNetUnfolderBase]: 2920/4284 cut-off events. [2024-06-21 18:49:20,325 INFO L125 PetriNetUnfolderBase]: For 233334/233338 co-relation queries the response was YES. [2024-06-21 18:49:20,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40493 conditions, 4284 events. 2920/4284 cut-off events. For 233334/233338 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20307 event pairs, 620 based on Foata normal form. 7/4291 useless extension candidates. Maximal degree in co-relation 40412. Up to 3749 conditions per place. [2024-06-21 18:49:20,365 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 249 selfloop transitions, 150 changer transitions 0/402 dead transitions. [2024-06-21 18:49:20,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 402 transitions, 7401 flow [2024-06-21 18:49:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:49:20,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 18:49:20,366 INFO L175 Difference]: Start difference. First operand has 182 places, 341 transitions, 5493 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:49:20,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 402 transitions, 7401 flow [2024-06-21 18:49:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 402 transitions, 7293 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-21 18:49:20,714 INFO L231 Difference]: Finished difference. Result has 191 places, 375 transitions, 6576 flow [2024-06-21 18:49:20,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6576, PETRI_PLACES=191, PETRI_TRANSITIONS=375} [2024-06-21 18:49:20,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 18:49:20,715 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 375 transitions, 6576 flow [2024-06-21 18:49:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:20,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:49:20,715 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:20,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2035605614, now seen corresponding path program 2 times [2024-06-21 18:49:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184795199] [2024-06-21 18:49:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:22,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184795199] [2024-06-21 18:49:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184795199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:22,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:22,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34901350] [2024-06-21 18:49:22,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:22,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:22,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 375 transitions, 6576 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:22,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:22,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:22,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:23,327 INFO L124 PetriNetUnfolderBase]: 2952/4336 cut-off events. [2024-06-21 18:49:23,328 INFO L125 PetriNetUnfolderBase]: For 260148/260152 co-relation queries the response was YES. [2024-06-21 18:49:23,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42786 conditions, 4336 events. 2952/4336 cut-off events. For 260148/260152 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20741 event pairs, 883 based on Foata normal form. 7/4343 useless extension candidates. Maximal degree in co-relation 42700. Up to 4186 conditions per place. [2024-06-21 18:49:23,387 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 352 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-21 18:49:23,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 408 transitions, 7808 flow [2024-06-21 18:49:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 18:49:23,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:49:23,390 INFO L175 Difference]: Start difference. First operand has 191 places, 375 transitions, 6576 flow. Second operand 9 states and 144 transitions. [2024-06-21 18:49:23,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 408 transitions, 7808 flow [2024-06-21 18:49:23,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 408 transitions, 7603 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 18:49:23,809 INFO L231 Difference]: Finished difference. Result has 197 places, 383 transitions, 6643 flow [2024-06-21 18:49:23,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6643, PETRI_PLACES=197, PETRI_TRANSITIONS=383} [2024-06-21 18:49:23,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 18:49:23,810 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 383 transitions, 6643 flow [2024-06-21 18:49:23,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:23,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:23,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:49:23,810 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:23,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2035611411, now seen corresponding path program 7 times [2024-06-21 18:49:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571014565] [2024-06-21 18:49:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571014565] [2024-06-21 18:49:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571014565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:24,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348170684] [2024-06-21 18:49:24,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:24,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:24,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:24,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 383 transitions, 6643 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:25,853 INFO L124 PetriNetUnfolderBase]: 2946/4322 cut-off events. [2024-06-21 18:49:25,853 INFO L125 PetriNetUnfolderBase]: For 256346/256350 co-relation queries the response was YES. [2024-06-21 18:49:25,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42920 conditions, 4322 events. 2946/4322 cut-off events. For 256346/256350 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20548 event pairs, 624 based on Foata normal form. 7/4329 useless extension candidates. Maximal degree in co-relation 42832. Up to 3791 conditions per place. [2024-06-21 18:49:25,897 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 277 selfloop transitions, 136 changer transitions 0/416 dead transitions. [2024-06-21 18:49:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 416 transitions, 8079 flow [2024-06-21 18:49:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:49:25,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:49:25,899 INFO L175 Difference]: Start difference. First operand has 197 places, 383 transitions, 6643 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:49:25,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 416 transitions, 8079 flow [2024-06-21 18:49:26,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 416 transitions, 7863 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:26,388 INFO L231 Difference]: Finished difference. Result has 199 places, 389 transitions, 6925 flow [2024-06-21 18:49:26,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6925, PETRI_PLACES=199, PETRI_TRANSITIONS=389} [2024-06-21 18:49:26,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 18:49:26,388 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 389 transitions, 6925 flow [2024-06-21 18:49:26,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:26,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:26,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:26,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:49:26,389 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:26,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2035611566, now seen corresponding path program 5 times [2024-06-21 18:49:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851758086] [2024-06-21 18:49:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:27,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:27,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851758086] [2024-06-21 18:49:27,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851758086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:27,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:27,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:27,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367535396] [2024-06-21 18:49:27,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:27,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:27,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:27,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:27,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 389 transitions, 6925 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:27,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:28,368 INFO L124 PetriNetUnfolderBase]: 2886/4270 cut-off events. [2024-06-21 18:49:28,368 INFO L125 PetriNetUnfolderBase]: For 269033/269039 co-relation queries the response was YES. [2024-06-21 18:49:28,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43239 conditions, 4270 events. 2886/4270 cut-off events. For 269033/269039 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20580 event pairs, 573 based on Foata normal form. 8/4278 useless extension candidates. Maximal degree in co-relation 43150. Up to 3726 conditions per place. [2024-06-21 18:49:28,409 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 86 changer transitions 0/413 dead transitions. [2024-06-21 18:49:28,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 413 transitions, 7839 flow [2024-06-21 18:49:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:49:28,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 18:49:28,411 INFO L175 Difference]: Start difference. First operand has 199 places, 389 transitions, 6925 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:49:28,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 413 transitions, 7839 flow [2024-06-21 18:49:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 413 transitions, 7571 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:28,856 INFO L231 Difference]: Finished difference. Result has 203 places, 395 transitions, 6999 flow [2024-06-21 18:49:28,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6999, PETRI_PLACES=203, PETRI_TRANSITIONS=395} [2024-06-21 18:49:28,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 18:49:28,857 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 395 transitions, 6999 flow [2024-06-21 18:49:28,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:28,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:28,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:28,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:49:28,858 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:28,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2006524910, now seen corresponding path program 3 times [2024-06-21 18:49:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:28,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198639355] [2024-06-21 18:49:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198639355] [2024-06-21 18:49:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198639355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170569630] [2024-06-21 18:49:30,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:30,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:30,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:30,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:30,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 395 transitions, 6999 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:30,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:30,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:30,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:31,260 INFO L124 PetriNetUnfolderBase]: 3048/4473 cut-off events. [2024-06-21 18:49:31,260 INFO L125 PetriNetUnfolderBase]: For 294798/294802 co-relation queries the response was YES. [2024-06-21 18:49:31,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45478 conditions, 4473 events. 3048/4473 cut-off events. For 294798/294802 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21363 event pairs, 615 based on Foata normal form. 13/4486 useless extension candidates. Maximal degree in co-relation 45388. Up to 3510 conditions per place. [2024-06-21 18:49:31,303 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 239 selfloop transitions, 197 changer transitions 0/439 dead transitions. [2024-06-21 18:49:31,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 439 transitions, 8933 flow [2024-06-21 18:49:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:49:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:49:31,304 INFO L175 Difference]: Start difference. First operand has 203 places, 395 transitions, 6999 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:49:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 439 transitions, 8933 flow [2024-06-21 18:49:31,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 439 transitions, 8675 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:31,756 INFO L231 Difference]: Finished difference. Result has 208 places, 408 transitions, 7568 flow [2024-06-21 18:49:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6741, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7568, PETRI_PLACES=208, PETRI_TRANSITIONS=408} [2024-06-21 18:49:31,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 18:49:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 408 transitions, 7568 flow [2024-06-21 18:49:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:31,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:49:31,758 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:31,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2061826771, now seen corresponding path program 8 times [2024-06-21 18:49:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:31,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451391536] [2024-06-21 18:49:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:32,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:32,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451391536] [2024-06-21 18:49:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451391536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:32,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:32,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:32,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053572672] [2024-06-21 18:49:32,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:32,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:32,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 408 transitions, 7568 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:32,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:33,924 INFO L124 PetriNetUnfolderBase]: 3066/4500 cut-off events. [2024-06-21 18:49:33,924 INFO L125 PetriNetUnfolderBase]: For 317160/317164 co-relation queries the response was YES. [2024-06-21 18:49:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47973 conditions, 4500 events. 3066/4500 cut-off events. For 317160/317164 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21520 event pairs, 615 based on Foata normal form. 7/4507 useless extension candidates. Maximal degree in co-relation 47880. Up to 3572 conditions per place. [2024-06-21 18:49:33,975 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 242 selfloop transitions, 197 changer transitions 0/442 dead transitions. [2024-06-21 18:49:33,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 442 transitions, 9270 flow [2024-06-21 18:49:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:49:33,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:49:33,976 INFO L175 Difference]: Start difference. First operand has 208 places, 408 transitions, 7568 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:49:33,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 442 transitions, 9270 flow [2024-06-21 18:49:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 442 transitions, 8823 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:34,566 INFO L231 Difference]: Finished difference. Result has 213 places, 412 transitions, 7666 flow [2024-06-21 18:49:34,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7165, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7666, PETRI_PLACES=213, PETRI_TRANSITIONS=412} [2024-06-21 18:49:34,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 18:49:34,567 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 412 transitions, 7666 flow [2024-06-21 18:49:34,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:34,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:34,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:49:34,568 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:34,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2006519113, now seen corresponding path program 9 times [2024-06-21 18:49:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656903797] [2024-06-21 18:49:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656903797] [2024-06-21 18:49:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656903797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799453247] [2024-06-21 18:49:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:35,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:35,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:35,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 412 transitions, 7666 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:35,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:35,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:36,587 INFO L124 PetriNetUnfolderBase]: 3054/4482 cut-off events. [2024-06-21 18:49:36,587 INFO L125 PetriNetUnfolderBase]: For 315868/315872 co-relation queries the response was YES. [2024-06-21 18:49:36,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47805 conditions, 4482 events. 3054/4482 cut-off events. For 315868/315872 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21420 event pairs, 615 based on Foata normal form. 7/4489 useless extension candidates. Maximal degree in co-relation 47710. Up to 3558 conditions per place. [2024-06-21 18:49:36,638 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 242 selfloop transitions, 196 changer transitions 0/441 dead transitions. [2024-06-21 18:49:36,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 441 transitions, 9162 flow [2024-06-21 18:49:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:49:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:49:36,639 INFO L175 Difference]: Start difference. First operand has 213 places, 412 transitions, 7666 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:49:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 441 transitions, 9162 flow [2024-06-21 18:49:37,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 441 transitions, 8624 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:37,230 INFO L231 Difference]: Finished difference. Result has 215 places, 412 transitions, 7530 flow [2024-06-21 18:49:37,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7128, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7530, PETRI_PLACES=215, PETRI_TRANSITIONS=412} [2024-06-21 18:49:37,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 18:49:37,231 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 412 transitions, 7530 flow [2024-06-21 18:49:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:37,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:37,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:49:37,232 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:37,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2061821036, now seen corresponding path program 6 times [2024-06-21 18:49:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966117518] [2024-06-21 18:49:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966117518] [2024-06-21 18:49:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966117518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:38,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:38,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841664431] [2024-06-21 18:49:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:38,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 412 transitions, 7530 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:38,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:38,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:39,390 INFO L124 PetriNetUnfolderBase]: 2970/4396 cut-off events. [2024-06-21 18:49:39,390 INFO L125 PetriNetUnfolderBase]: For 324614/324620 co-relation queries the response was YES. [2024-06-21 18:49:39,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47069 conditions, 4396 events. 2970/4396 cut-off events. For 324614/324620 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21302 event pairs, 572 based on Foata normal form. 8/4404 useless extension candidates. Maximal degree in co-relation 46973. Up to 3701 conditions per place. [2024-06-21 18:49:39,437 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 125 changer transitions 0/433 dead transitions. [2024-06-21 18:49:39,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 433 transitions, 8480 flow [2024-06-21 18:49:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:49:39,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:49:39,439 INFO L175 Difference]: Start difference. First operand has 215 places, 412 transitions, 7530 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:49:39,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 433 transitions, 8480 flow [2024-06-21 18:49:39,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 433 transitions, 8071 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:39,951 INFO L231 Difference]: Finished difference. Result has 215 places, 415 transitions, 7529 flow [2024-06-21 18:49:39,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7529, PETRI_PLACES=215, PETRI_TRANSITIONS=415} [2024-06-21 18:49:39,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 18:49:39,952 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 415 transitions, 7529 flow [2024-06-21 18:49:39,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:39,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:39,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:49:39,953 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:39,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2006726503, now seen corresponding path program 10 times [2024-06-21 18:49:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789089599] [2024-06-21 18:49:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789089599] [2024-06-21 18:49:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789089599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:40,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558945318] [2024-06-21 18:49:40,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:40,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:41,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 415 transitions, 7529 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:42,013 INFO L124 PetriNetUnfolderBase]: 3051/4478 cut-off events. [2024-06-21 18:49:42,014 INFO L125 PetriNetUnfolderBase]: For 336547/336551 co-relation queries the response was YES. [2024-06-21 18:49:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47702 conditions, 4478 events. 3051/4478 cut-off events. For 336547/336551 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21432 event pairs, 609 based on Foata normal form. 7/4485 useless extension candidates. Maximal degree in co-relation 47606. Up to 3556 conditions per place. [2024-06-21 18:49:42,064 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 188 selfloop transitions, 254 changer transitions 0/445 dead transitions. [2024-06-21 18:49:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 445 transitions, 8941 flow [2024-06-21 18:49:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 18:49:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 18:49:42,065 INFO L175 Difference]: Start difference. First operand has 215 places, 415 transitions, 7529 flow. Second operand 8 states and 147 transitions. [2024-06-21 18:49:42,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 445 transitions, 8941 flow [2024-06-21 18:49:42,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 445 transitions, 8567 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:42,602 INFO L231 Difference]: Finished difference. Result has 217 places, 419 transitions, 7790 flow [2024-06-21 18:49:42,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7155, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7790, PETRI_PLACES=217, PETRI_TRANSITIONS=419} [2024-06-21 18:49:42,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 18:49:42,603 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 419 transitions, 7790 flow [2024-06-21 18:49:42,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:42,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:42,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:42,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:49:42,604 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2006734160, now seen corresponding path program 4 times [2024-06-21 18:49:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:42,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724100736] [2024-06-21 18:49:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:43,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724100736] [2024-06-21 18:49:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724100736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:43,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:43,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:43,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801000701] [2024-06-21 18:49:43,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:43,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:43,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:43,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:43,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:43,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:43,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 419 transitions, 7790 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:43,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:43,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:43,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:45,062 INFO L124 PetriNetUnfolderBase]: 3125/4583 cut-off events. [2024-06-21 18:49:45,062 INFO L125 PetriNetUnfolderBase]: For 360160/360164 co-relation queries the response was YES. [2024-06-21 18:49:45,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49960 conditions, 4583 events. 3125/4583 cut-off events. For 360160/360164 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21993 event pairs, 609 based on Foata normal form. 7/4590 useless extension candidates. Maximal degree in co-relation 49863. Up to 3372 conditions per place. [2024-06-21 18:49:45,112 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 171 selfloop transitions, 283 changer transitions 0/457 dead transitions. [2024-06-21 18:49:45,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 457 transitions, 9594 flow [2024-06-21 18:49:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:49:45,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:49:45,113 INFO L175 Difference]: Start difference. First operand has 217 places, 419 transitions, 7790 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:49:45,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 457 transitions, 9594 flow [2024-06-21 18:49:45,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 457 transitions, 9152 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:45,658 INFO L231 Difference]: Finished difference. Result has 222 places, 428 transitions, 8266 flow [2024-06-21 18:49:45,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7348, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8266, PETRI_PLACES=222, PETRI_TRANSITIONS=428} [2024-06-21 18:49:45,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 18:49:45,659 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 428 transitions, 8266 flow [2024-06-21 18:49:45,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:45,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:45,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:45,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:49:45,661 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:45,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:45,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2013876560, now seen corresponding path program 5 times [2024-06-21 18:49:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579319948] [2024-06-21 18:49:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:47,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579319948] [2024-06-21 18:49:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579319948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586720900] [2024-06-21 18:49:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:47,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:49:47,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 428 transitions, 8266 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:47,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:47,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:49:47,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:48,112 INFO L124 PetriNetUnfolderBase]: 3119/4581 cut-off events. [2024-06-21 18:49:48,112 INFO L125 PetriNetUnfolderBase]: For 386947/386955 co-relation queries the response was YES. [2024-06-21 18:49:48,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51105 conditions, 4581 events. 3119/4581 cut-off events. For 386947/386955 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22196 event pairs, 874 based on Foata normal form. 11/4592 useless extension candidates. Maximal degree in co-relation 51006. Up to 4320 conditions per place. [2024-06-21 18:49:48,164 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 373 selfloop transitions, 79 changer transitions 0/455 dead transitions. [2024-06-21 18:49:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 455 transitions, 9545 flow [2024-06-21 18:49:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 18:49:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:49:48,165 INFO L175 Difference]: Start difference. First operand has 222 places, 428 transitions, 8266 flow. Second operand 9 states and 144 transitions. [2024-06-21 18:49:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 455 transitions, 9545 flow [2024-06-21 18:49:48,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 455 transitions, 9034 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:48,760 INFO L231 Difference]: Finished difference. Result has 226 places, 431 transitions, 8045 flow [2024-06-21 18:49:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8045, PETRI_PLACES=226, PETRI_TRANSITIONS=431} [2024-06-21 18:49:48,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 18:49:48,761 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 431 transitions, 8045 flow [2024-06-21 18:49:48,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:49:48,762 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -530226919, now seen corresponding path program 1 times [2024-06-21 18:49:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559669366] [2024-06-21 18:49:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:49,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:49,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559669366] [2024-06-21 18:49:49,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559669366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:49,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:49,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:49:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646424511] [2024-06-21 18:49:49,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:49,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:49:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:49:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:49:49,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:49,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 431 transitions, 8045 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:49,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:49,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:50,705 INFO L124 PetriNetUnfolderBase]: 2864/4323 cut-off events. [2024-06-21 18:49:50,705 INFO L125 PetriNetUnfolderBase]: For 346429/346429 co-relation queries the response was YES. [2024-06-21 18:49:50,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47446 conditions, 4323 events. 2864/4323 cut-off events. For 346429/346429 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21624 event pairs, 898 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 47345. Up to 4176 conditions per place. [2024-06-21 18:49:50,753 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 425 selfloop transitions, 13 changer transitions 0/442 dead transitions. [2024-06-21 18:49:50,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 442 transitions, 8975 flow [2024-06-21 18:49:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:49:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:49:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 18:49:50,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 18:49:50,754 INFO L175 Difference]: Start difference. First operand has 226 places, 431 transitions, 8045 flow. Second operand 6 states and 95 transitions. [2024-06-21 18:49:50,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 442 transitions, 8975 flow [2024-06-21 18:49:51,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 442 transitions, 8758 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:51,306 INFO L231 Difference]: Finished difference. Result has 226 places, 434 transitions, 7896 flow [2024-06-21 18:49:51,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7828, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7896, PETRI_PLACES=226, PETRI_TRANSITIONS=434} [2024-06-21 18:49:51,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 18:49:51,307 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 434 transitions, 7896 flow [2024-06-21 18:49:51,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:51,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:51,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:51,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:49:51,308 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:51,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -59411800, now seen corresponding path program 1 times [2024-06-21 18:49:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971540302] [2024-06-21 18:49:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:51,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971540302] [2024-06-21 18:49:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971540302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:52,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:49:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839158109] [2024-06-21 18:49:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:52,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:49:52,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:49:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:49:52,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:49:52,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 434 transitions, 7896 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) [2024-06-21 18:49:52,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:52,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:49:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:53,110 INFO L124 PetriNetUnfolderBase]: 2661/4144 cut-off events. [2024-06-21 18:49:53,111 INFO L125 PetriNetUnfolderBase]: For 376683/376752 co-relation queries the response was YES. [2024-06-21 18:49:53,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46089 conditions, 4144 events. 2661/4144 cut-off events. For 376683/376752 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22163 event pairs, 446 based on Foata normal form. 10/4115 useless extension candidates. Maximal degree in co-relation 45986. Up to 3114 conditions per place. [2024-06-21 18:49:53,163 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 283 selfloop transitions, 69 changer transitions 0/466 dead transitions. [2024-06-21 18:49:53,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 466 transitions, 8836 flow [2024-06-21 18:49:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:49:53,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 18:49:53,164 INFO L175 Difference]: Start difference. First operand has 226 places, 434 transitions, 7896 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:49:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 466 transitions, 8836 flow [2024-06-21 18:49:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 466 transitions, 8792 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:53,835 INFO L231 Difference]: Finished difference. Result has 230 places, 439 transitions, 8192 flow [2024-06-21 18:49:53,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7852, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8192, PETRI_PLACES=230, PETRI_TRANSITIONS=439} [2024-06-21 18:49:53,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 18:49:53,836 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 439 transitions, 8192 flow [2024-06-21 18:49:53,837 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) [2024-06-21 18:49:53,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:53,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:49:53,837 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 115437116, now seen corresponding path program 2 times [2024-06-21 18:49:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025689991] [2024-06-21 18:49:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:54,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:54,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025689991] [2024-06-21 18:49:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025689991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:54,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969091495] [2024-06-21 18:49:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:54,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 439 transitions, 8192 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:54,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:56,151 INFO L124 PetriNetUnfolderBase]: 3122/4629 cut-off events. [2024-06-21 18:49:56,151 INFO L125 PetriNetUnfolderBase]: For 420736/420746 co-relation queries the response was YES. [2024-06-21 18:49:56,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52806 conditions, 4629 events. 3122/4629 cut-off events. For 420736/420746 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22885 event pairs, 521 based on Foata normal form. 14/4643 useless extension candidates. Maximal degree in co-relation 52701. Up to 4083 conditions per place. [2024-06-21 18:49:56,202 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 59 changer transitions 0/478 dead transitions. [2024-06-21 18:49:56,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 478 transitions, 9418 flow [2024-06-21 18:49:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:49:56,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:49:56,203 INFO L175 Difference]: Start difference. First operand has 230 places, 439 transitions, 8192 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:49:56,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 478 transitions, 9418 flow [2024-06-21 18:49:56,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 478 transitions, 9174 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:56,953 INFO L231 Difference]: Finished difference. Result has 235 places, 447 transitions, 8400 flow [2024-06-21 18:49:56,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8400, PETRI_PLACES=235, PETRI_TRANSITIONS=447} [2024-06-21 18:49:56,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 18:49:56,953 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 447 transitions, 8400 flow [2024-06-21 18:49:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:56,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:56,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:56,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:49:56,954 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:56,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 374846264, now seen corresponding path program 1 times [2024-06-21 18:49:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900586365] [2024-06-21 18:49:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900586365] [2024-06-21 18:49:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900586365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:49:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032208855] [2024-06-21 18:49:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:49:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:49:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:49:57,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 447 transitions, 8400 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:57,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:57,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:58,935 INFO L124 PetriNetUnfolderBase]: 3207/4762 cut-off events. [2024-06-21 18:49:58,935 INFO L125 PetriNetUnfolderBase]: For 441135/441176 co-relation queries the response was YES. [2024-06-21 18:49:58,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54609 conditions, 4762 events. 3207/4762 cut-off events. For 441135/441176 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23714 event pairs, 550 based on Foata normal form. 46/4805 useless extension candidates. Maximal degree in co-relation 54503. Up to 4064 conditions per place. [2024-06-21 18:49:58,988 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 284 selfloop transitions, 201 changer transitions 0/515 dead transitions. [2024-06-21 18:49:58,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 515 transitions, 10727 flow [2024-06-21 18:49:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:49:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:49:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:49:58,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:49:58,989 INFO L175 Difference]: Start difference. First operand has 235 places, 447 transitions, 8400 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:49:58,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 515 transitions, 10727 flow [2024-06-21 18:50:00,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 515 transitions, 10481 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:00,022 INFO L231 Difference]: Finished difference. Result has 241 places, 482 transitions, 9726 flow [2024-06-21 18:50:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9726, PETRI_PLACES=241, PETRI_TRANSITIONS=482} [2024-06-21 18:50:00,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 18:50:00,023 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 482 transitions, 9726 flow [2024-06-21 18:50:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:00,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:00,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:00,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:50:00,024 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:00,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1170881046, now seen corresponding path program 2 times [2024-06-21 18:50:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:00,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606640301] [2024-06-21 18:50:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:00,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:01,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:01,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606640301] [2024-06-21 18:50:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606640301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160813414] [2024-06-21 18:50:01,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:01,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:01,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:01,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:01,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 482 transitions, 9726 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:01,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:01,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:01,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:02,388 INFO L124 PetriNetUnfolderBase]: 3506/5142 cut-off events. [2024-06-21 18:50:02,389 INFO L125 PetriNetUnfolderBase]: For 478012/478028 co-relation queries the response was YES. [2024-06-21 18:50:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60710 conditions, 5142 events. 3506/5142 cut-off events. For 478012/478028 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25445 event pairs, 605 based on Foata normal form. 24/5166 useless extension candidates. Maximal degree in co-relation 60601. Up to 4616 conditions per place. [2024-06-21 18:50:02,453 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 398 selfloop transitions, 180 changer transitions 0/581 dead transitions. [2024-06-21 18:50:02,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 581 transitions, 13113 flow [2024-06-21 18:50:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 18:50:02,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-21 18:50:02,454 INFO L175 Difference]: Start difference. First operand has 241 places, 482 transitions, 9726 flow. Second operand 10 states and 177 transitions. [2024-06-21 18:50:02,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 581 transitions, 13113 flow [2024-06-21 18:50:03,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 581 transitions, 12758 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:03,468 INFO L231 Difference]: Finished difference. Result has 249 places, 537 transitions, 11578 flow [2024-06-21 18:50:03,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9471, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11578, PETRI_PLACES=249, PETRI_TRANSITIONS=537} [2024-06-21 18:50:03,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 18:50:03,469 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 537 transitions, 11578 flow [2024-06-21 18:50:03,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:03,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:03,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:50:03,469 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:03,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1156108120, now seen corresponding path program 3 times [2024-06-21 18:50:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004266306] [2024-06-21 18:50:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:03,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004266306] [2024-06-21 18:50:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004266306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:04,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:04,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528365634] [2024-06-21 18:50:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:04,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:04,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 537 transitions, 11578 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:04,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:04,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:04,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:06,224 INFO L124 PetriNetUnfolderBase]: 3442/5092 cut-off events. [2024-06-21 18:50:06,224 INFO L125 PetriNetUnfolderBase]: For 500216/500235 co-relation queries the response was YES. [2024-06-21 18:50:06,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61161 conditions, 5092 events. 3442/5092 cut-off events. For 500216/500235 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25623 event pairs, 585 based on Foata normal form. 20/5103 useless extension candidates. Maximal degree in co-relation 61050. Up to 4474 conditions per place. [2024-06-21 18:50:06,288 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 400 selfloop transitions, 82 changer transitions 0/570 dead transitions. [2024-06-21 18:50:06,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 570 transitions, 12792 flow [2024-06-21 18:50:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:50:06,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:50:06,290 INFO L175 Difference]: Start difference. First operand has 249 places, 537 transitions, 11578 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:50:06,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 570 transitions, 12792 flow [2024-06-21 18:50:07,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 570 transitions, 12293 flow, removed 232 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:07,247 INFO L231 Difference]: Finished difference. Result has 255 places, 539 transitions, 11394 flow [2024-06-21 18:50:07,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11079, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11394, PETRI_PLACES=255, PETRI_TRANSITIONS=539} [2024-06-21 18:50:07,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 18:50:07,249 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 539 transitions, 11394 flow [2024-06-21 18:50:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:07,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:50:07,250 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:07,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1372157890, now seen corresponding path program 4 times [2024-06-21 18:50:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:07,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932287209] [2024-06-21 18:50:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:08,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932287209] [2024-06-21 18:50:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932287209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:08,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:08,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:08,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535513082] [2024-06-21 18:50:08,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:08,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:08,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 539 transitions, 11394 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:08,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:08,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:08,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:10,002 INFO L124 PetriNetUnfolderBase]: 3467/5126 cut-off events. [2024-06-21 18:50:10,003 INFO L125 PetriNetUnfolderBase]: For 512222/512232 co-relation queries the response was YES. [2024-06-21 18:50:10,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61732 conditions, 5126 events. 3467/5126 cut-off events. For 512222/512232 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25752 event pairs, 531 based on Foata normal form. 14/5140 useless extension candidates. Maximal degree in co-relation 61619. Up to 4491 conditions per place. [2024-06-21 18:50:10,069 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 401 selfloop transitions, 83 changer transitions 0/572 dead transitions. [2024-06-21 18:50:10,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 572 transitions, 12664 flow [2024-06-21 18:50:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:50:10,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:50:10,071 INFO L175 Difference]: Start difference. First operand has 255 places, 539 transitions, 11394 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:50:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 572 transitions, 12664 flow [2024-06-21 18:50:11,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 572 transitions, 12418 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:11,309 INFO L231 Difference]: Finished difference. Result has 260 places, 543 transitions, 11534 flow [2024-06-21 18:50:11,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11534, PETRI_PLACES=260, PETRI_TRANSITIONS=543} [2024-06-21 18:50:11,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 18:50:11,310 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 543 transitions, 11534 flow [2024-06-21 18:50:11,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:11,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:11,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:11,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:50:11,311 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:11,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 115497690, now seen corresponding path program 3 times [2024-06-21 18:50:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:11,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636697817] [2024-06-21 18:50:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:11,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:12,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636697817] [2024-06-21 18:50:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636697817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:12,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:12,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764177463] [2024-06-21 18:50:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:12,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:12,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 543 transitions, 11534 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:13,865 INFO L124 PetriNetUnfolderBase]: 3680/5392 cut-off events. [2024-06-21 18:50:13,865 INFO L125 PetriNetUnfolderBase]: For 542684/542692 co-relation queries the response was YES. [2024-06-21 18:50:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65145 conditions, 5392 events. 3680/5392 cut-off events. For 542684/542692 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26877 event pairs, 563 based on Foata normal form. 16/5408 useless extension candidates. Maximal degree in co-relation 65031. Up to 4838 conditions per place. [2024-06-21 18:50:13,936 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 423 selfloop transitions, 191 changer transitions 0/617 dead transitions. [2024-06-21 18:50:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 617 transitions, 14334 flow [2024-06-21 18:50:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 18:50:13,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 18:50:13,937 INFO L175 Difference]: Start difference. First operand has 260 places, 543 transitions, 11534 flow. Second operand 9 states and 161 transitions. [2024-06-21 18:50:13,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 617 transitions, 14334 flow [2024-06-21 18:50:15,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 617 transitions, 13895 flow, removed 140 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:15,486 INFO L231 Difference]: Finished difference. Result has 263 places, 584 transitions, 12730 flow [2024-06-21 18:50:15,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11095, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12730, PETRI_PLACES=263, PETRI_TRANSITIONS=584} [2024-06-21 18:50:15,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 18:50:15,486 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 584 transitions, 12730 flow [2024-06-21 18:50:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:15,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:15,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:15,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:50:15,494 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:15,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash 118294076, now seen corresponding path program 5 times [2024-06-21 18:50:15,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:15,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501241650] [2024-06-21 18:50:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:15,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:16,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:16,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501241650] [2024-06-21 18:50:16,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501241650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:16,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:16,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:16,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26993194] [2024-06-21 18:50:16,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:16,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:16,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:16,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 584 transitions, 12730 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:16,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:16,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:16,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:18,244 INFO L124 PetriNetUnfolderBase]: 3622/5351 cut-off events. [2024-06-21 18:50:18,245 INFO L125 PetriNetUnfolderBase]: For 566098/566114 co-relation queries the response was YES. [2024-06-21 18:50:18,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65793 conditions, 5351 events. 3622/5351 cut-off events. For 566098/566114 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27132 event pairs, 533 based on Foata normal form. 20/5371 useless extension candidates. Maximal degree in co-relation 65677. Up to 4681 conditions per place. [2024-06-21 18:50:18,310 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 438 selfloop transitions, 80 changer transitions 0/617 dead transitions. [2024-06-21 18:50:18,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 617 transitions, 14026 flow [2024-06-21 18:50:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:50:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:50:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:50:18,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:50:18,311 INFO L175 Difference]: Start difference. First operand has 263 places, 584 transitions, 12730 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:50:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 617 transitions, 14026 flow [2024-06-21 18:50:19,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 617 transitions, 13766 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-21 18:50:19,783 INFO L231 Difference]: Finished difference. Result has 268 places, 588 transitions, 12807 flow [2024-06-21 18:50:19,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12470, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12807, PETRI_PLACES=268, PETRI_TRANSITIONS=588} [2024-06-21 18:50:19,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 18:50:19,784 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 588 transitions, 12807 flow [2024-06-21 18:50:19,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:19,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:19,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:50:19,784 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:19,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash 233763000, now seen corresponding path program 4 times [2024-06-21 18:50:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135946496] [2024-06-21 18:50:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:21,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:21,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135946496] [2024-06-21 18:50:21,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135946496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:21,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:21,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:21,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211494003] [2024-06-21 18:50:21,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:21,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:21,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 588 transitions, 12807 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:21,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:21,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:21,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:22,607 INFO L124 PetriNetUnfolderBase]: 3766/5519 cut-off events. [2024-06-21 18:50:22,607 INFO L125 PetriNetUnfolderBase]: For 594783/594793 co-relation queries the response was YES. [2024-06-21 18:50:22,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68597 conditions, 5519 events. 3766/5519 cut-off events. For 594783/594793 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27647 event pairs, 571 based on Foata normal form. 13/5532 useless extension candidates. Maximal degree in co-relation 68480. Up to 4458 conditions per place. [2024-06-21 18:50:22,684 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 315 selfloop transitions, 315 changer transitions 0/633 dead transitions. [2024-06-21 18:50:22,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 633 transitions, 15181 flow [2024-06-21 18:50:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 18:50:22,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 18:50:22,686 INFO L175 Difference]: Start difference. First operand has 268 places, 588 transitions, 12807 flow. Second operand 9 states and 163 transitions. [2024-06-21 18:50:22,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 633 transitions, 15181 flow [2024-06-21 18:50:24,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 633 transitions, 14924 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:24,120 INFO L231 Difference]: Finished difference. Result has 274 places, 600 transitions, 13883 flow [2024-06-21 18:50:24,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13883, PETRI_PLACES=274, PETRI_TRANSITIONS=600} [2024-06-21 18:50:24,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 18:50:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 600 transitions, 13883 flow [2024-06-21 18:50:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:24,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:50:24,122 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:24,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash 231985758, now seen corresponding path program 1 times [2024-06-21 18:50:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357873865] [2024-06-21 18:50:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357873865] [2024-06-21 18:50:25,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357873865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:25,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:25,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730778545] [2024-06-21 18:50:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:25,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:25,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 600 transitions, 13883 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:25,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:25,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:27,070 INFO L124 PetriNetUnfolderBase]: 3802/5571 cut-off events. [2024-06-21 18:50:27,070 INFO L125 PetriNetUnfolderBase]: For 627586/627596 co-relation queries the response was YES. [2024-06-21 18:50:27,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71174 conditions, 5571 events. 3802/5571 cut-off events. For 627586/627596 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27940 event pairs, 573 based on Foata normal form. 16/5587 useless extension candidates. Maximal degree in co-relation 71054. Up to 4573 conditions per place. [2024-06-21 18:50:27,152 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 339 selfloop transitions, 299 changer transitions 0/641 dead transitions. [2024-06-21 18:50:27,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 641 transitions, 15823 flow [2024-06-21 18:50:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 18:50:27,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-21 18:50:27,157 INFO L175 Difference]: Start difference. First operand has 274 places, 600 transitions, 13883 flow. Second operand 10 states and 178 transitions. [2024-06-21 18:50:27,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 641 transitions, 15823 flow [2024-06-21 18:50:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 641 transitions, 15517 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-21 18:50:28,913 INFO L231 Difference]: Finished difference. Result has 280 places, 604 transitions, 14363 flow [2024-06-21 18:50:28,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13585, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14363, PETRI_PLACES=280, PETRI_TRANSITIONS=604} [2024-06-21 18:50:28,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 18:50:28,914 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 604 transitions, 14363 flow [2024-06-21 18:50:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:28,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:50:28,915 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash 231801308, now seen corresponding path program 6 times [2024-06-21 18:50:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999244885] [2024-06-21 18:50:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:30,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:30,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999244885] [2024-06-21 18:50:30,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999244885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:30,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:30,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869343947] [2024-06-21 18:50:30,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:30,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 604 transitions, 14363 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:31,978 INFO L124 PetriNetUnfolderBase]: 3738/5516 cut-off events. [2024-06-21 18:50:31,978 INFO L125 PetriNetUnfolderBase]: For 639025/639037 co-relation queries the response was YES. [2024-06-21 18:50:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71497 conditions, 5516 events. 3738/5516 cut-off events. For 639025/639037 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27982 event pairs, 543 based on Foata normal form. 16/5532 useless extension candidates. Maximal degree in co-relation 71375. Up to 4707 conditions per place. [2024-06-21 18:50:32,058 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 409 selfloop transitions, 123 changer transitions 0/635 dead transitions. [2024-06-21 18:50:32,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 635 transitions, 15689 flow [2024-06-21 18:50:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:50:32,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:50:32,060 INFO L175 Difference]: Start difference. First operand has 280 places, 604 transitions, 14363 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:50:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 635 transitions, 15689 flow [2024-06-21 18:50:33,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 635 transitions, 14961 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-21 18:50:33,799 INFO L231 Difference]: Finished difference. Result has 281 places, 606 transitions, 14049 flow [2024-06-21 18:50:33,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13635, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14049, PETRI_PLACES=281, PETRI_TRANSITIONS=606} [2024-06-21 18:50:33,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 18:50:33,800 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 606 transitions, 14049 flow [2024-06-21 18:50:33,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:33,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:33,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:33,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:50:33,800 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:33,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 231986006, now seen corresponding path program 1 times [2024-06-21 18:50:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:33,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623946753] [2024-06-21 18:50:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:35,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623946753] [2024-06-21 18:50:35,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623946753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:35,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:35,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:35,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118869874] [2024-06-21 18:50:35,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:35,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:35,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:35,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:35,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 606 transitions, 14049 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:35,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:35,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:35,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:36,790 INFO L124 PetriNetUnfolderBase]: 3971/5846 cut-off events. [2024-06-21 18:50:36,791 INFO L125 PetriNetUnfolderBase]: For 730284/730294 co-relation queries the response was YES. [2024-06-21 18:50:36,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74631 conditions, 5846 events. 3971/5846 cut-off events. For 730284/730294 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29819 event pairs, 584 based on Foata normal form. 46/5892 useless extension candidates. Maximal degree in co-relation 74508. Up to 4670 conditions per place. [2024-06-21 18:50:36,874 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 349 selfloop transitions, 298 changer transitions 0/650 dead transitions. [2024-06-21 18:50:36,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 650 transitions, 16047 flow [2024-06-21 18:50:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 18:50:36,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-21 18:50:36,875 INFO L175 Difference]: Start difference. First operand has 281 places, 606 transitions, 14049 flow. Second operand 10 states and 181 transitions. [2024-06-21 18:50:36,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 650 transitions, 16047 flow [2024-06-21 18:50:38,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 650 transitions, 15653 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:38,758 INFO L231 Difference]: Finished difference. Result has 284 places, 609 transitions, 14415 flow [2024-06-21 18:50:38,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13655, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14415, PETRI_PLACES=284, PETRI_TRANSITIONS=609} [2024-06-21 18:50:38,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:50:38,759 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 609 transitions, 14415 flow [2024-06-21 18:50:38,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:38,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:38,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:38,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:50:38,760 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:38,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash 231806082, now seen corresponding path program 5 times [2024-06-21 18:50:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:38,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957413979] [2024-06-21 18:50:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:38,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:40,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:40,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957413979] [2024-06-21 18:50:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957413979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:40,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:40,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787419989] [2024-06-21 18:50:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:40,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:40,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:40,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:40,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 609 transitions, 14415 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:40,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:40,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:40,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:41,731 INFO L124 PetriNetUnfolderBase]: 3965/5838 cut-off events. [2024-06-21 18:50:41,731 INFO L125 PetriNetUnfolderBase]: For 688928/688938 co-relation queries the response was YES. [2024-06-21 18:50:41,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75379 conditions, 5838 events. 3965/5838 cut-off events. For 688928/688938 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29789 event pairs, 593 based on Foata normal form. 13/5851 useless extension candidates. Maximal degree in co-relation 75255. Up to 4781 conditions per place. [2024-06-21 18:50:41,810 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 381 selfloop transitions, 257 changer transitions 0/641 dead transitions. [2024-06-21 18:50:41,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 641 transitions, 16243 flow [2024-06-21 18:50:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:50:41,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:50:41,812 INFO L175 Difference]: Start difference. First operand has 284 places, 609 transitions, 14415 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:50:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 641 transitions, 16243 flow [2024-06-21 18:50:43,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 641 transitions, 15651 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:43,819 INFO L231 Difference]: Finished difference. Result has 286 places, 609 transitions, 14358 flow [2024-06-21 18:50:43,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13823, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14358, PETRI_PLACES=286, PETRI_TRANSITIONS=609} [2024-06-21 18:50:43,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 18:50:43,820 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 609 transitions, 14358 flow [2024-06-21 18:50:43,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:43,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:43,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:43,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:50:43,820 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:43,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash -265732794, now seen corresponding path program 1 times [2024-06-21 18:50:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:43,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460579588] [2024-06-21 18:50:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:43,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:44,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:44,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460579588] [2024-06-21 18:50:44,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460579588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:44,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:44,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:44,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001572120] [2024-06-21 18:50:44,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:44,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:44,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:44,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:44,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 609 transitions, 14358 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:44,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:44,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:44,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:46,301 INFO L124 PetriNetUnfolderBase]: 3959/5836 cut-off events. [2024-06-21 18:50:46,301 INFO L125 PetriNetUnfolderBase]: For 695686/695690 co-relation queries the response was YES. [2024-06-21 18:50:46,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74446 conditions, 5836 events. 3959/5836 cut-off events. For 695686/695690 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29979 event pairs, 963 based on Foata normal form. 6/5842 useless extension candidates. Maximal degree in co-relation 74321. Up to 5763 conditions per place. [2024-06-21 18:50:46,382 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 596 selfloop transitions, 28 changer transitions 0/627 dead transitions. [2024-06-21 18:50:46,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 627 transitions, 15778 flow [2024-06-21 18:50:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 18:50:46,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 18:50:46,383 INFO L175 Difference]: Start difference. First operand has 286 places, 609 transitions, 14358 flow. Second operand 7 states and 113 transitions. [2024-06-21 18:50:46,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 627 transitions, 15778 flow [2024-06-21 18:50:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 627 transitions, 14777 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-21 18:50:48,199 INFO L231 Difference]: Finished difference. Result has 284 places, 609 transitions, 13423 flow [2024-06-21 18:50:48,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13357, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13423, PETRI_PLACES=284, PETRI_TRANSITIONS=609} [2024-06-21 18:50:48,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:50:48,200 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 609 transitions, 13423 flow [2024-06-21 18:50:48,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:48,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:48,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:48,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:50:48,200 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:48,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 949096544, now seen corresponding path program 7 times [2024-06-21 18:50:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005204597] [2024-06-21 18:50:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:49,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005204597] [2024-06-21 18:50:49,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005204597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:49,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:49,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033410901] [2024-06-21 18:50:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:49,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:49,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 609 transitions, 13423 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:49,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:49,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:51,032 INFO L124 PetriNetUnfolderBase]: 3915/5821 cut-off events. [2024-06-21 18:50:51,032 INFO L125 PetriNetUnfolderBase]: For 705373/705385 co-relation queries the response was YES. [2024-06-21 18:50:51,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72519 conditions, 5821 events. 3915/5821 cut-off events. For 705373/705385 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30348 event pairs, 561 based on Foata normal form. 16/5837 useless extension candidates. Maximal degree in co-relation 72394. Up to 5092 conditions per place. [2024-06-21 18:50:51,118 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 472 selfloop transitions, 68 changer transitions 0/644 dead transitions. [2024-06-21 18:50:51,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 644 transitions, 14862 flow [2024-06-21 18:50:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:50:51,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:50:51,121 INFO L175 Difference]: Start difference. First operand has 284 places, 609 transitions, 13423 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:50:51,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 644 transitions, 14862 flow [2024-06-21 18:50:52,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 644 transitions, 14802 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:52,943 INFO L231 Difference]: Finished difference. Result has 289 places, 619 transitions, 13812 flow [2024-06-21 18:50:52,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13363, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13812, PETRI_PLACES=289, PETRI_TRANSITIONS=619} [2024-06-21 18:50:52,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 18:50:52,943 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 619 transitions, 13812 flow [2024-06-21 18:50:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:52,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:52,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:52,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:50:52,944 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:52,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash 949156994, now seen corresponding path program 8 times [2024-06-21 18:50:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:52,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770849130] [2024-06-21 18:50:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:54,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:54,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770849130] [2024-06-21 18:50:54,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770849130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:54,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:54,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161117701] [2024-06-21 18:50:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:54,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:54,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 619 transitions, 13812 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:54,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:54,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:54,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:55,853 INFO L124 PetriNetUnfolderBase]: 3973/5913 cut-off events. [2024-06-21 18:50:55,853 INFO L125 PetriNetUnfolderBase]: For 739895/739905 co-relation queries the response was YES. [2024-06-21 18:50:55,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74197 conditions, 5913 events. 3973/5913 cut-off events. For 739895/739905 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30977 event pairs, 565 based on Foata normal form. 14/5927 useless extension candidates. Maximal degree in co-relation 74070. Up to 5153 conditions per place. [2024-06-21 18:50:55,938 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 456 selfloop transitions, 92 changer transitions 0/652 dead transitions. [2024-06-21 18:50:55,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 652 transitions, 15256 flow [2024-06-21 18:50:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:50:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:50:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:50:55,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:50:55,940 INFO L175 Difference]: Start difference. First operand has 289 places, 619 transitions, 13812 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:50:55,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 652 transitions, 15256 flow [2024-06-21 18:50:57,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 652 transitions, 14958 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-21 18:50:57,890 INFO L231 Difference]: Finished difference. Result has 293 places, 629 transitions, 14007 flow [2024-06-21 18:50:57,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13514, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14007, PETRI_PLACES=293, PETRI_TRANSITIONS=629} [2024-06-21 18:50:57,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 18:50:57,891 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 629 transitions, 14007 flow [2024-06-21 18:50:57,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:57,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:57,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:57,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:50:57,892 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:57,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 949157118, now seen corresponding path program 6 times [2024-06-21 18:50:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238413239] [2024-06-21 18:50:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:59,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:59,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238413239] [2024-06-21 18:50:59,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238413239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:59,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127567796] [2024-06-21 18:50:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:59,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:50:59,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 629 transitions, 14007 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:59,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:59,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:50:59,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:00,756 INFO L124 PetriNetUnfolderBase]: 4169/6147 cut-off events. [2024-06-21 18:51:00,756 INFO L125 PetriNetUnfolderBase]: For 768175/768183 co-relation queries the response was YES. [2024-06-21 18:51:00,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77479 conditions, 6147 events. 4169/6147 cut-off events. For 768175/768183 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31880 event pairs, 608 based on Foata normal form. 14/6161 useless extension candidates. Maximal degree in co-relation 77351. Up to 5581 conditions per place. [2024-06-21 18:51:00,839 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 481 selfloop transitions, 196 changer transitions 0/680 dead transitions. [2024-06-21 18:51:00,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 680 transitions, 16678 flow [2024-06-21 18:51:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:51:00,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:51:00,840 INFO L175 Difference]: Start difference. First operand has 293 places, 629 transitions, 14007 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:51:00,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 680 transitions, 16678 flow [2024-06-21 18:51:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 680 transitions, 16265 flow, removed 128 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:02,975 INFO L231 Difference]: Finished difference. Result has 297 places, 653 transitions, 14920 flow [2024-06-21 18:51:02,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13594, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14920, PETRI_PLACES=297, PETRI_TRANSITIONS=653} [2024-06-21 18:51:02,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 18:51:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 653 transitions, 14920 flow [2024-06-21 18:51:02,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:02,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:02,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:02,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:51:02,976 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash 951958464, now seen corresponding path program 2 times [2024-06-21 18:51:02,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:02,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479376321] [2024-06-21 18:51:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:02,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479376321] [2024-06-21 18:51:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479376321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762374327] [2024-06-21 18:51:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:04,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:04,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 653 transitions, 14920 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:04,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:04,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:04,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:06,027 INFO L124 PetriNetUnfolderBase]: 4233/6237 cut-off events. [2024-06-21 18:51:06,027 INFO L125 PetriNetUnfolderBase]: For 795105/795113 co-relation queries the response was YES. [2024-06-21 18:51:06,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79500 conditions, 6237 events. 4233/6237 cut-off events. For 795105/795113 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32371 event pairs, 616 based on Foata normal form. 14/6251 useless extension candidates. Maximal degree in co-relation 79370. Up to 5844 conditions per place. [2024-06-21 18:51:06,119 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 541 selfloop transitions, 149 changer transitions 0/693 dead transitions. [2024-06-21 18:51:06,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 693 transitions, 17107 flow [2024-06-21 18:51:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:51:06,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 18:51:06,120 INFO L175 Difference]: Start difference. First operand has 297 places, 653 transitions, 14920 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:51:06,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 693 transitions, 17107 flow [2024-06-21 18:51:08,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 693 transitions, 16743 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:08,260 INFO L231 Difference]: Finished difference. Result has 300 places, 661 transitions, 15075 flow [2024-06-21 18:51:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14556, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15075, PETRI_PLACES=300, PETRI_TRANSITIONS=661} [2024-06-21 18:51:08,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-21 18:51:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 661 transitions, 15075 flow [2024-06-21 18:51:08,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:08,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:08,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:51:08,261 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:08,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1320556732, now seen corresponding path program 3 times [2024-06-21 18:51:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859560764] [2024-06-21 18:51:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:09,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859560764] [2024-06-21 18:51:09,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859560764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:09,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:09,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:51:09,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125985373] [2024-06-21 18:51:09,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:51:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:51:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:51:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:09,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 661 transitions, 15075 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:09,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:09,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:09,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:11,465 INFO L124 PetriNetUnfolderBase]: 4297/6327 cut-off events. [2024-06-21 18:51:11,466 INFO L125 PetriNetUnfolderBase]: For 815597/815605 co-relation queries the response was YES. [2024-06-21 18:51:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81031 conditions, 6327 events. 4297/6327 cut-off events. For 815597/815605 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32870 event pairs, 610 based on Foata normal form. 14/6341 useless extension candidates. Maximal degree in co-relation 80900. Up to 5686 conditions per place. [2024-06-21 18:51:11,557 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 500 selfloop transitions, 198 changer transitions 0/701 dead transitions. [2024-06-21 18:51:11,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 701 transitions, 17306 flow [2024-06-21 18:51:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:51:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:51:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 18:51:11,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:51:11,558 INFO L175 Difference]: Start difference. First operand has 300 places, 661 transitions, 15075 flow. Second operand 10 states and 170 transitions. [2024-06-21 18:51:11,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 701 transitions, 17306 flow [2024-06-21 18:51:13,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 701 transitions, 17049 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 18:51:13,929 INFO L231 Difference]: Finished difference. Result has 306 places, 669 transitions, 15450 flow [2024-06-21 18:51:13,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14818, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15450, PETRI_PLACES=306, PETRI_TRANSITIONS=669} [2024-06-21 18:51:13,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 18:51:13,930 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 669 transitions, 15450 flow [2024-06-21 18:51:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:13,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:13,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:13,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:51:13,931 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:13,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1067429372, now seen corresponding path program 2 times [2024-06-21 18:51:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260215569] [2024-06-21 18:51:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:15,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260215569] [2024-06-21 18:51:15,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260215569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:15,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:15,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705037336] [2024-06-21 18:51:15,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:15,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 669 transitions, 15450 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:17,342 INFO L124 PetriNetUnfolderBase]: 4633/6859 cut-off events. [2024-06-21 18:51:17,342 INFO L125 PetriNetUnfolderBase]: For 948646/948654 co-relation queries the response was YES. [2024-06-21 18:51:17,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87486 conditions, 6859 events. 4633/6859 cut-off events. For 948646/948654 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36345 event pairs, 639 based on Foata normal form. 50/6909 useless extension candidates. Maximal degree in co-relation 87354. Up to 5786 conditions per place. [2024-06-21 18:51:17,439 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 479 selfloop transitions, 249 changer transitions 0/731 dead transitions. [2024-06-21 18:51:17,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 731 transitions, 18227 flow [2024-06-21 18:51:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:51:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 18:51:17,441 INFO L175 Difference]: Start difference. First operand has 306 places, 669 transitions, 15450 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:51:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 731 transitions, 18227 flow [2024-06-21 18:51:19,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 731 transitions, 17627 flow, removed 104 selfloop flow, removed 8 redundant places. [2024-06-21 18:51:19,591 INFO L231 Difference]: Finished difference. Result has 308 places, 697 transitions, 16255 flow [2024-06-21 18:51:19,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14950, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16255, PETRI_PLACES=308, PETRI_TRANSITIONS=697} [2024-06-21 18:51:19,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 18:51:19,592 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 697 transitions, 16255 flow [2024-06-21 18:51:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:19,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:19,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:51:19,593 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:19,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1320556546, now seen corresponding path program 7 times [2024-06-21 18:51:19,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429569792] [2024-06-21 18:51:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:20,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429569792] [2024-06-21 18:51:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429569792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:20,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:20,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972726861] [2024-06-21 18:51:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:20,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:20,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 697 transitions, 16255 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:20,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:20,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:20,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:22,751 INFO L124 PetriNetUnfolderBase]: 4727/6992 cut-off events. [2024-06-21 18:51:22,751 INFO L125 PetriNetUnfolderBase]: For 945717/945725 co-relation queries the response was YES. [2024-06-21 18:51:22,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91216 conditions, 6992 events. 4727/6992 cut-off events. For 945717/945725 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37267 event pairs, 640 based on Foata normal form. 11/7003 useless extension candidates. Maximal degree in co-relation 91082. Up to 6177 conditions per place. [2024-06-21 18:51:22,856 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 526 selfloop transitions, 217 changer transitions 0/746 dead transitions. [2024-06-21 18:51:22,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 746 transitions, 19143 flow [2024-06-21 18:51:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:51:22,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:51:22,857 INFO L175 Difference]: Start difference. First operand has 308 places, 697 transitions, 16255 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:51:22,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 746 transitions, 19143 flow [2024-06-21 18:51:26,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 746 transitions, 18545 flow, removed 162 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:26,148 INFO L231 Difference]: Finished difference. Result has 313 places, 716 transitions, 16739 flow [2024-06-21 18:51:26,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15657, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16739, PETRI_PLACES=313, PETRI_TRANSITIONS=716} [2024-06-21 18:51:26,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 18:51:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 716 transitions, 16739 flow [2024-06-21 18:51:26,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:26,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:26,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:26,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:51:26,149 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:26,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1067429124, now seen corresponding path program 4 times [2024-06-21 18:51:26,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:26,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144760875] [2024-06-21 18:51:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144760875] [2024-06-21 18:51:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144760875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:27,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745096326] [2024-06-21 18:51:27,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:27,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:27,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 716 transitions, 16739 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:29,396 INFO L124 PetriNetUnfolderBase]: 4829/7138 cut-off events. [2024-06-21 18:51:29,396 INFO L125 PetriNetUnfolderBase]: For 960532/960540 co-relation queries the response was YES. [2024-06-21 18:51:29,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92306 conditions, 7138 events. 4829/7138 cut-off events. For 960532/960540 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38156 event pairs, 643 based on Foata normal form. 14/7152 useless extension candidates. Maximal degree in co-relation 92169. Up to 6300 conditions per place. [2024-06-21 18:51:29,507 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 489 selfloop transitions, 273 changer transitions 0/765 dead transitions. [2024-06-21 18:51:29,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 765 transitions, 19518 flow [2024-06-21 18:51:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 18:51:29,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 18:51:29,509 INFO L175 Difference]: Start difference. First operand has 313 places, 716 transitions, 16739 flow. Second operand 9 states and 167 transitions. [2024-06-21 18:51:29,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 765 transitions, 19518 flow [2024-06-21 18:51:32,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 765 transitions, 19030 flow, removed 137 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:32,506 INFO L231 Difference]: Finished difference. Result has 317 places, 732 transitions, 17386 flow [2024-06-21 18:51:32,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16261, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17386, PETRI_PLACES=317, PETRI_TRANSITIONS=732} [2024-06-21 18:51:32,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 18:51:32,507 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 732 transitions, 17386 flow [2024-06-21 18:51:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:32,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:32,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:32,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:51:32,507 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:32,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1320729526, now seen corresponding path program 8 times [2024-06-21 18:51:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847956752] [2024-06-21 18:51:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847956752] [2024-06-21 18:51:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847956752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:33,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:33,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311089211] [2024-06-21 18:51:33,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:33,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:33,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 732 transitions, 17386 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:33,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:33,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:33,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:35,935 INFO L124 PetriNetUnfolderBase]: 4831/7141 cut-off events. [2024-06-21 18:51:35,935 INFO L125 PetriNetUnfolderBase]: For 950618/950626 co-relation queries the response was YES. [2024-06-21 18:51:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93604 conditions, 7141 events. 4831/7141 cut-off events. For 950618/950626 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38145 event pairs, 642 based on Foata normal form. 11/7152 useless extension candidates. Maximal degree in co-relation 93465. Up to 6328 conditions per place. [2024-06-21 18:51:36,040 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 504 selfloop transitions, 256 changer transitions 0/763 dead transitions. [2024-06-21 18:51:36,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 763 transitions, 19582 flow [2024-06-21 18:51:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:51:36,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:51:36,042 INFO L175 Difference]: Start difference. First operand has 317 places, 732 transitions, 17386 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:51:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 763 transitions, 19582 flow [2024-06-21 18:51:39,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 763 transitions, 19025 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 18:51:39,062 INFO L231 Difference]: Finished difference. Result has 321 places, 737 transitions, 17556 flow [2024-06-21 18:51:39,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16829, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17556, PETRI_PLACES=321, PETRI_TRANSITIONS=737} [2024-06-21 18:51:39,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 18:51:39,063 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 737 transitions, 17556 flow [2024-06-21 18:51:39,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:39,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:39,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:39,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:51:39,063 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:39,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1320551772, now seen corresponding path program 9 times [2024-06-21 18:51:39,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:39,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778989813] [2024-06-21 18:51:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:40,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778989813] [2024-06-21 18:51:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778989813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:40,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:40,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647133450] [2024-06-21 18:51:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:40,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:51:40,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 737 transitions, 17556 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:40,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:40,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:51:40,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:42,373 INFO L124 PetriNetUnfolderBase]: 4724/7049 cut-off events. [2024-06-21 18:51:42,374 INFO L125 PetriNetUnfolderBase]: For 974813/974823 co-relation queries the response was YES. [2024-06-21 18:51:42,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92458 conditions, 7049 events. 4724/7049 cut-off events. For 974813/974823 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38289 event pairs, 590 based on Foata normal form. 14/7063 useless extension candidates. Maximal degree in co-relation 92318. Up to 6138 conditions per place. [2024-06-21 18:51:42,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 100 changer transitions 0/764 dead transitions. [2024-06-21 18:51:42,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 764 transitions, 19096 flow [2024-06-21 18:51:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:51:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:51:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 18:51:42,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 18:51:42,484 INFO L175 Difference]: Start difference. First operand has 321 places, 737 transitions, 17556 flow. Second operand 9 states and 152 transitions. [2024-06-21 18:51:42,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 764 transitions, 19096 flow [2024-06-21 18:51:45,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 764 transitions, 18591 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 18:51:45,497 INFO L231 Difference]: Finished difference. Result has 324 places, 741 transitions, 17461 flow [2024-06-21 18:51:45,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17051, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17461, PETRI_PLACES=324, PETRI_TRANSITIONS=741} [2024-06-21 18:51:45,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 18:51:45,498 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 741 transitions, 17461 flow [2024-06-21 18:51:45,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:45,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:45,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:45,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:51:45,498 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:45,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash -127479834, now seen corresponding path program 2 times [2024-06-21 18:51:45,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:45,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518078747] [2024-06-21 18:51:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518078747] [2024-06-21 18:51:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518078747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:46,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:51:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179670245] [2024-06-21 18:51:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:51:46,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:51:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:51:46,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:46,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 741 transitions, 17461 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:46,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:46,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:46,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:48,464 INFO L124 PetriNetUnfolderBase]: 4864/7201 cut-off events. [2024-06-21 18:51:48,464 INFO L125 PetriNetUnfolderBase]: For 1007032/1007036 co-relation queries the response was YES. [2024-06-21 18:51:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94228 conditions, 7201 events. 4864/7201 cut-off events. For 1007032/1007036 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38795 event pairs, 1057 based on Foata normal form. 5/7206 useless extension candidates. Maximal degree in co-relation 94087. Up to 7125 conditions per place. [2024-06-21 18:51:48,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 723 selfloop transitions, 30 changer transitions 0/756 dead transitions. [2024-06-21 18:51:48,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 756 transitions, 19225 flow [2024-06-21 18:51:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:51:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:51:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 18:51:48,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:51:48,576 INFO L175 Difference]: Start difference. First operand has 324 places, 741 transitions, 17461 flow. Second operand 6 states and 99 transitions. [2024-06-21 18:51:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 756 transitions, 19225 flow [2024-06-21 18:51:51,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 756 transitions, 18828 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-21 18:51:51,554 INFO L231 Difference]: Finished difference. Result has 322 places, 744 transitions, 17222 flow [2024-06-21 18:51:51,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17064, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17222, PETRI_PLACES=322, PETRI_TRANSITIONS=744} [2024-06-21 18:51:51,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-21 18:51:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 744 transitions, 17222 flow [2024-06-21 18:51:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:51,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:51,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:51:51,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:51,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2072731130, now seen corresponding path program 3 times [2024-06-21 18:51:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:51,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797490019] [2024-06-21 18:51:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:52,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797490019] [2024-06-21 18:51:52,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797490019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:52,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:52,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:51:52,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79842657] [2024-06-21 18:51:52,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:52,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:51:52,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:51:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:51:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:53,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 744 transitions, 17222 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:53,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:53,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:53,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:51:55,352 INFO L124 PetriNetUnfolderBase]: 4892/7248 cut-off events. [2024-06-21 18:51:55,352 INFO L125 PetriNetUnfolderBase]: For 1035816/1035824 co-relation queries the response was YES. [2024-06-21 18:51:55,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94358 conditions, 7248 events. 4892/7248 cut-off events. For 1035816/1035824 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39178 event pairs, 1046 based on Foata normal form. 14/7262 useless extension candidates. Maximal degree in co-relation 94215. Up to 6956 conditions per place. [2024-06-21 18:51:55,449 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 703 selfloop transitions, 74 changer transitions 0/780 dead transitions. [2024-06-21 18:51:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 780 transitions, 19512 flow [2024-06-21 18:51:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:51:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:51:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 18:51:55,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 18:51:55,451 INFO L175 Difference]: Start difference. First operand has 322 places, 744 transitions, 17222 flow. Second operand 10 states and 160 transitions. [2024-06-21 18:51:55,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 780 transitions, 19512 flow [2024-06-21 18:51:58,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 780 transitions, 19457 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 18:51:58,120 INFO L231 Difference]: Finished difference. Result has 330 places, 750 transitions, 17558 flow [2024-06-21 18:51:58,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17167, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17558, PETRI_PLACES=330, PETRI_TRANSITIONS=750} [2024-06-21 18:51:58,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 18:51:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 750 transitions, 17558 flow [2024-06-21 18:51:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:58,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:51:58,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:51:58,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:51:58,121 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:51:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:51:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -507871996, now seen corresponding path program 5 times [2024-06-21 18:51:58,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:51:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686698278] [2024-06-21 18:51:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:51:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:51:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:51:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:51:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:51:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686698278] [2024-06-21 18:51:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686698278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:51:59,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:51:59,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:51:59,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881975128] [2024-06-21 18:51:59,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:51:59,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:51:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:51:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:51:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:51:59,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:51:59,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 750 transitions, 17558 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:51:59,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:51:59,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:51:59,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:02,023 INFO L124 PetriNetUnfolderBase]: 4928/7289 cut-off events. [2024-06-21 18:52:02,023 INFO L125 PetriNetUnfolderBase]: For 1062848/1062860 co-relation queries the response was YES. [2024-06-21 18:52:02,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96082 conditions, 7289 events. 4928/7289 cut-off events. For 1062848/1062860 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39215 event pairs, 607 based on Foata normal form. 18/7307 useless extension candidates. Maximal degree in co-relation 95936. Up to 6114 conditions per place. [2024-06-21 18:52:02,132 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 482 selfloop transitions, 300 changer transitions 0/785 dead transitions. [2024-06-21 18:52:02,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 785 transitions, 19916 flow [2024-06-21 18:52:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 18:52:02,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 18:52:02,133 INFO L175 Difference]: Start difference. First operand has 330 places, 750 transitions, 17558 flow. Second operand 10 states and 171 transitions. [2024-06-21 18:52:02,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 785 transitions, 19916 flow [2024-06-21 18:52:04,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 785 transitions, 19602 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:04,853 INFO L231 Difference]: Finished difference. Result has 334 places, 754 transitions, 18073 flow [2024-06-21 18:52:04,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17244, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18073, PETRI_PLACES=334, PETRI_TRANSITIONS=754} [2024-06-21 18:52:04,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-21 18:52:04,854 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 754 transitions, 18073 flow [2024-06-21 18:52:04,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:04,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:04,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:04,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:52:04,855 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:04,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2072724186, now seen corresponding path program 9 times [2024-06-21 18:52:04,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:04,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923286327] [2024-06-21 18:52:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:04,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923286327] [2024-06-21 18:52:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923286327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:06,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:06,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807015921] [2024-06-21 18:52:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:06,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:06,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 754 transitions, 18073 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:06,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:06,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:06,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:08,281 INFO L124 PetriNetUnfolderBase]: 4970/7349 cut-off events. [2024-06-21 18:52:08,282 INFO L125 PetriNetUnfolderBase]: For 1099593/1099605 co-relation queries the response was YES. [2024-06-21 18:52:08,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98724 conditions, 7349 events. 4970/7349 cut-off events. For 1099593/1099605 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39521 event pairs, 606 based on Foata normal form. 15/7364 useless extension candidates. Maximal degree in co-relation 98577. Up to 5770 conditions per place. [2024-06-21 18:52:08,397 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 452 selfloop transitions, 340 changer transitions 0/795 dead transitions. [2024-06-21 18:52:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 795 transitions, 21327 flow [2024-06-21 18:52:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:52:08,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:52:08,398 INFO L175 Difference]: Start difference. First operand has 334 places, 754 transitions, 18073 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:52:08,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 795 transitions, 21327 flow [2024-06-21 18:52:11,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 795 transitions, 20546 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:11,658 INFO L231 Difference]: Finished difference. Result has 337 places, 766 transitions, 18673 flow [2024-06-21 18:52:11,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17292, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18673, PETRI_PLACES=337, PETRI_TRANSITIONS=766} [2024-06-21 18:52:11,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 18:52:11,659 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 766 transitions, 18673 flow [2024-06-21 18:52:11,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:11,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:11,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:11,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:52:11,659 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:11,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash -508056446, now seen corresponding path program 10 times [2024-06-21 18:52:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748368508] [2024-06-21 18:52:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748368508] [2024-06-21 18:52:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748368508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:13,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:13,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893953319] [2024-06-21 18:52:13,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:13,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:13,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:52:13,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 766 transitions, 18673 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:13,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:13,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:52:13,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:15,420 INFO L124 PetriNetUnfolderBase]: 4824/7198 cut-off events. [2024-06-21 18:52:15,421 INFO L125 PetriNetUnfolderBase]: For 1110575/1110589 co-relation queries the response was YES. [2024-06-21 18:52:15,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97024 conditions, 7198 events. 4824/7198 cut-off events. For 1110575/1110589 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39242 event pairs, 594 based on Foata normal form. 18/7216 useless extension candidates. Maximal degree in co-relation 96874. Up to 6128 conditions per place. [2024-06-21 18:52:15,532 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 509 selfloop transitions, 143 changer transitions 0/791 dead transitions. [2024-06-21 18:52:15,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 791 transitions, 20263 flow [2024-06-21 18:52:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:52:15,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:52:15,533 INFO L175 Difference]: Start difference. First operand has 337 places, 766 transitions, 18673 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:52:15,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 791 transitions, 20263 flow [2024-06-21 18:52:18,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 791 transitions, 19389 flow, removed 169 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:18,962 INFO L231 Difference]: Finished difference. Result has 340 places, 768 transitions, 18294 flow [2024-06-21 18:52:18,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17799, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18294, PETRI_PLACES=340, PETRI_TRANSITIONS=768} [2024-06-21 18:52:18,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 18:52:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 768 transitions, 18294 flow [2024-06-21 18:52:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:18,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:18,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:52:18,963 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:18,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash -508056322, now seen corresponding path program 10 times [2024-06-21 18:52:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994805066] [2024-06-21 18:52:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:20,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:20,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994805066] [2024-06-21 18:52:20,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994805066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:20,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:20,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:20,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488981891] [2024-06-21 18:52:20,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:20,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:20,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:20,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:20,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 768 transitions, 18294 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:20,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:20,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:20,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:22,641 INFO L124 PetriNetUnfolderBase]: 4956/7329 cut-off events. [2024-06-21 18:52:22,641 INFO L125 PetriNetUnfolderBase]: For 1089208/1089220 co-relation queries the response was YES. [2024-06-21 18:52:22,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96854 conditions, 7329 events. 4956/7329 cut-off events. For 1089208/1089220 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39428 event pairs, 605 based on Foata normal form. 15/7344 useless extension candidates. Maximal degree in co-relation 96704. Up to 5754 conditions per place. [2024-06-21 18:52:22,759 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 455 selfloop transitions, 338 changer transitions 0/796 dead transitions. [2024-06-21 18:52:22,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 796 transitions, 20800 flow [2024-06-21 18:52:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:52:22,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:52:22,761 INFO L175 Difference]: Start difference. First operand has 340 places, 768 transitions, 18294 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:52:22,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 796 transitions, 20800 flow [2024-06-21 18:52:26,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 796 transitions, 20187 flow, removed 167 selfloop flow, removed 6 redundant places. [2024-06-21 18:52:27,002 INFO L231 Difference]: Finished difference. Result has 343 places, 768 transitions, 18372 flow [2024-06-21 18:52:27,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17681, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18372, PETRI_PLACES=343, PETRI_TRANSITIONS=768} [2024-06-21 18:52:27,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 18:52:27,004 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 768 transitions, 18372 flow [2024-06-21 18:52:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:27,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:27,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:52:27,004 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:27,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1985764136, now seen corresponding path program 4 times [2024-06-21 18:52:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484292471] [2024-06-21 18:52:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:28,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484292471] [2024-06-21 18:52:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484292471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:28,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653120106] [2024-06-21 18:52:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:28,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:28,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 768 transitions, 18372 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:28,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:28,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:31,328 INFO L124 PetriNetUnfolderBase]: 5167/7662 cut-off events. [2024-06-21 18:52:31,329 INFO L125 PetriNetUnfolderBase]: For 1243663/1243675 co-relation queries the response was YES. [2024-06-21 18:52:31,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104428 conditions, 7662 events. 5167/7662 cut-off events. For 1243663/1243675 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41601 event pairs, 567 based on Foata normal form. 18/7680 useless extension candidates. Maximal degree in co-relation 104277. Up to 5072 conditions per place. [2024-06-21 18:52:31,526 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 350 selfloop transitions, 460 changer transitions 0/813 dead transitions. [2024-06-21 18:52:31,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 813 transitions, 21462 flow [2024-06-21 18:52:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 18:52:31,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 18:52:31,527 INFO L175 Difference]: Start difference. First operand has 343 places, 768 transitions, 18372 flow. Second operand 10 states and 179 transitions. [2024-06-21 18:52:31,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 813 transitions, 21462 flow [2024-06-21 18:52:35,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 813 transitions, 20771 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 18:52:35,114 INFO L231 Difference]: Finished difference. Result has 345 places, 774 transitions, 19019 flow [2024-06-21 18:52:35,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17693, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19019, PETRI_PLACES=345, PETRI_TRANSITIONS=774} [2024-06-21 18:52:35,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-21 18:52:35,115 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 774 transitions, 19019 flow [2024-06-21 18:52:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:35,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:35,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:35,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:52:35,115 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:35,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1986060806, now seen corresponding path program 5 times [2024-06-21 18:52:35,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:35,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753884529] [2024-06-21 18:52:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:35,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753884529] [2024-06-21 18:52:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753884529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:36,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:36,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:36,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782721035] [2024-06-21 18:52:36,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:36,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:36,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 774 transitions, 19019 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:39,323 INFO L124 PetriNetUnfolderBase]: 5195/7706 cut-off events. [2024-06-21 18:52:39,323 INFO L125 PetriNetUnfolderBase]: For 1260530/1260542 co-relation queries the response was YES. [2024-06-21 18:52:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106147 conditions, 7706 events. 5195/7706 cut-off events. For 1260530/1260542 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42102 event pairs, 642 based on Foata normal form. 18/7724 useless extension candidates. Maximal degree in co-relation 105996. Up to 6150 conditions per place. [2024-06-21 18:52:39,569 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 363 selfloop transitions, 443 changer transitions 0/809 dead transitions. [2024-06-21 18:52:39,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 809 transitions, 21541 flow [2024-06-21 18:52:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 18:52:39,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 18:52:39,571 INFO L175 Difference]: Start difference. First operand has 345 places, 774 transitions, 19019 flow. Second operand 10 states and 172 transitions. [2024-06-21 18:52:39,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 809 transitions, 21541 flow [2024-06-21 18:52:43,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 809 transitions, 20930 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-21 18:52:43,409 INFO L231 Difference]: Finished difference. Result has 350 places, 777 transitions, 19510 flow [2024-06-21 18:52:43,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18426, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19510, PETRI_PLACES=350, PETRI_TRANSITIONS=777} [2024-06-21 18:52:43,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-21 18:52:43,410 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 777 transitions, 19510 flow [2024-06-21 18:52:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:43,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:43,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:43,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:52:43,410 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:43,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1986061054, now seen corresponding path program 6 times [2024-06-21 18:52:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:43,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466838201] [2024-06-21 18:52:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:43,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466838201] [2024-06-21 18:52:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466838201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:44,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:44,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:52:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829134398] [2024-06-21 18:52:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:52:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:52:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:52:45,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:45,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 777 transitions, 19510 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:45,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:45,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:45,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:47,795 INFO L124 PetriNetUnfolderBase]: 5263/7803 cut-off events. [2024-06-21 18:52:47,795 INFO L125 PetriNetUnfolderBase]: For 1298933/1298945 co-relation queries the response was YES. [2024-06-21 18:52:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109122 conditions, 7803 events. 5263/7803 cut-off events. For 1298933/1298945 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42776 event pairs, 643 based on Foata normal form. 18/7821 useless extension candidates. Maximal degree in co-relation 108969. Up to 6117 conditions per place. [2024-06-21 18:52:47,909 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 355 selfloop transitions, 459 changer transitions 0/817 dead transitions. [2024-06-21 18:52:47,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 817 transitions, 22334 flow [2024-06-21 18:52:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:52:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:52:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 18:52:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-21 18:52:47,910 INFO L175 Difference]: Start difference. First operand has 350 places, 777 transitions, 19510 flow. Second operand 10 states and 173 transitions. [2024-06-21 18:52:47,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 817 transitions, 22334 flow [2024-06-21 18:52:51,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 817 transitions, 21388 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:51,081 INFO L231 Difference]: Finished difference. Result has 353 places, 785 transitions, 19951 flow [2024-06-21 18:52:51,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18564, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19951, PETRI_PLACES=353, PETRI_TRANSITIONS=785} [2024-06-21 18:52:51,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-21 18:52:51,082 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 785 transitions, 19951 flow [2024-06-21 18:52:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:51,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:52:51,082 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:51,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1994341774, now seen corresponding path program 7 times [2024-06-21 18:52:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80405553] [2024-06-21 18:52:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:52:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:52:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:52:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80405553] [2024-06-21 18:52:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80405553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:52:52,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:52:52,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:52:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494426768] [2024-06-21 18:52:52,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:52:52,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:52:52,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:52:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:52:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:52:52,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:52:52,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 785 transitions, 19951 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:52,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:52:52,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:52:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:52:55,286 INFO L124 PetriNetUnfolderBase]: 5251/7787 cut-off events. [2024-06-21 18:52:55,286 INFO L125 PetriNetUnfolderBase]: For 1306087/1306099 co-relation queries the response was YES. [2024-06-21 18:52:55,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109208 conditions, 7787 events. 5251/7787 cut-off events. For 1306087/1306099 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42626 event pairs, 654 based on Foata normal form. 18/7805 useless extension candidates. Maximal degree in co-relation 109054. Up to 6646 conditions per place. [2024-06-21 18:52:55,418 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 442 selfloop transitions, 369 changer transitions 0/814 dead transitions. [2024-06-21 18:52:55,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 814 transitions, 22005 flow [2024-06-21 18:52:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:52:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:52:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:52:55,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:52:55,420 INFO L175 Difference]: Start difference. First operand has 353 places, 785 transitions, 19951 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:52:55,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 814 transitions, 22005 flow [2024-06-21 18:52:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 814 transitions, 21174 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-21 18:52:59,162 INFO L231 Difference]: Finished difference. Result has 355 places, 785 transitions, 19872 flow [2024-06-21 18:52:59,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=19120, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19872, PETRI_PLACES=355, PETRI_TRANSITIONS=785} [2024-06-21 18:52:59,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 18:52:59,163 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 785 transitions, 19872 flow [2024-06-21 18:52:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:52:59,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:52:59,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:52:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:52:59,164 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:52:59,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:52:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash -279970846, now seen corresponding path program 8 times [2024-06-21 18:52:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:52:59,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774743784] [2024-06-21 18:52:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:52:59,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:52:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774743784] [2024-06-21 18:53:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774743784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420532987] [2024-06-21 18:53:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:00,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:53:00,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 785 transitions, 19872 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:00,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:00,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:53:00,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:03,587 INFO L124 PetriNetUnfolderBase]: 5239/7771 cut-off events. [2024-06-21 18:53:03,587 INFO L125 PetriNetUnfolderBase]: For 1300664/1300676 co-relation queries the response was YES. [2024-06-21 18:53:03,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108965 conditions, 7771 events. 5239/7771 cut-off events. For 1300664/1300676 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42538 event pairs, 652 based on Foata normal form. 18/7789 useless extension candidates. Maximal degree in co-relation 108809. Up to 6604 conditions per place. [2024-06-21 18:53:03,705 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 440 selfloop transitions, 372 changer transitions 0/815 dead transitions. [2024-06-21 18:53:03,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 815 transitions, 21962 flow [2024-06-21 18:53:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 18:53:03,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 18:53:03,706 INFO L175 Difference]: Start difference. First operand has 355 places, 785 transitions, 19872 flow. Second operand 10 states and 171 transitions. [2024-06-21 18:53:03,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 815 transitions, 21962 flow [2024-06-21 18:53:08,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 815 transitions, 21000 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:08,389 INFO L231 Difference]: Finished difference. Result has 357 places, 785 transitions, 19663 flow [2024-06-21 18:53:08,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18910, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19663, PETRI_PLACES=357, PETRI_TRANSITIONS=785} [2024-06-21 18:53:08,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 18:53:08,389 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 785 transitions, 19663 flow [2024-06-21 18:53:08,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:08,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:08,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:08,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:53:08,390 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:08,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash -279970598, now seen corresponding path program 6 times [2024-06-21 18:53:08,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:08,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442915105] [2024-06-21 18:53:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:08,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442915105] [2024-06-21 18:53:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442915105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:09,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:09,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665874524] [2024-06-21 18:53:09,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:09,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:09,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:09,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:53:09,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 785 transitions, 19663 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:09,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:09,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:53:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:12,361 INFO L124 PetriNetUnfolderBase]: 5229/7768 cut-off events. [2024-06-21 18:53:12,361 INFO L125 PetriNetUnfolderBase]: For 1319184/1319192 co-relation queries the response was YES. [2024-06-21 18:53:12,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108117 conditions, 7768 events. 5229/7768 cut-off events. For 1319184/1319192 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42792 event pairs, 1086 based on Foata normal form. 14/7782 useless extension candidates. Maximal degree in co-relation 107960. Up to 7476 conditions per place. [2024-06-21 18:53:12,486 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 728 selfloop transitions, 85 changer transitions 0/816 dead transitions. [2024-06-21 18:53:12,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 816 transitions, 21863 flow [2024-06-21 18:53:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:53:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:53:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 18:53:12,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-21 18:53:12,487 INFO L175 Difference]: Start difference. First operand has 357 places, 785 transitions, 19663 flow. Second operand 10 states and 159 transitions. [2024-06-21 18:53:12,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 816 transitions, 21863 flow [2024-06-21 18:53:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 816 transitions, 20719 flow, removed 87 selfloop flow, removed 10 redundant places. [2024-06-21 18:53:16,642 INFO L231 Difference]: Finished difference. Result has 357 places, 787 transitions, 18863 flow [2024-06-21 18:53:16,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18519, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18863, PETRI_PLACES=357, PETRI_TRANSITIONS=787} [2024-06-21 18:53:16,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 18:53:16,643 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 787 transitions, 18863 flow [2024-06-21 18:53:16,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:53:16,643 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:16,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -279977542, now seen corresponding path program 11 times [2024-06-21 18:53:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904867928] [2024-06-21 18:53:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:17,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904867928] [2024-06-21 18:53:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904867928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:17,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:17,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:53:17,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97554912] [2024-06-21 18:53:17,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:17,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:53:17,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:53:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:53:17,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:53:17,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 787 transitions, 18863 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:17,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:17,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:53:17,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:20,384 INFO L124 PetriNetUnfolderBase]: 5231/7760 cut-off events. [2024-06-21 18:53:20,384 INFO L125 PetriNetUnfolderBase]: For 1304747/1304759 co-relation queries the response was YES. [2024-06-21 18:53:20,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106031 conditions, 7760 events. 5231/7760 cut-off events. For 1304747/1304759 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42466 event pairs, 645 based on Foata normal form. 15/7775 useless extension candidates. Maximal degree in co-relation 105874. Up to 6187 conditions per place. [2024-06-21 18:53:20,495 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 366 selfloop transitions, 446 changer transitions 0/815 dead transitions. [2024-06-21 18:53:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 815 transitions, 21095 flow [2024-06-21 18:53:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:53:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:53:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:53:20,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:53:20,497 INFO L175 Difference]: Start difference. First operand has 357 places, 787 transitions, 18863 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:53:20,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 815 transitions, 21095 flow [2024-06-21 18:53:24,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 815 transitions, 20751 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-21 18:53:24,090 INFO L231 Difference]: Finished difference. Result has 358 places, 791 transitions, 19635 flow [2024-06-21 18:53:24,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18519, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19635, PETRI_PLACES=358, PETRI_TRANSITIONS=791} [2024-06-21 18:53:24,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 18:53:24,091 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 791 transitions, 19635 flow [2024-06-21 18:53:24,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:24,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:24,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:53:24,092 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:24,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash 742822536, now seen corresponding path program 3 times [2024-06-21 18:53:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:24,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614531569] [2024-06-21 18:53:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614531569] [2024-06-21 18:53:25,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614531569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:25,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:25,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:25,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538316873] [2024-06-21 18:53:25,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:25,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:25,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:53:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 791 transitions, 19635 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:25,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:53:25,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:27,606 INFO L124 PetriNetUnfolderBase]: 5228/7765 cut-off events. [2024-06-21 18:53:27,607 INFO L125 PetriNetUnfolderBase]: For 1326835/1326843 co-relation queries the response was YES. [2024-06-21 18:53:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107239 conditions, 7765 events. 5228/7765 cut-off events. For 1326835/1326843 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42670 event pairs, 1110 based on Foata normal form. 9/7774 useless extension candidates. Maximal degree in co-relation 107081. Up to 7689 conditions per place. [2024-06-21 18:53:27,932 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 765 selfloop transitions, 31 changer transitions 0/799 dead transitions. [2024-06-21 18:53:27,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 799 transitions, 21253 flow [2024-06-21 18:53:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:53:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:53:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-21 18:53:27,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 18:53:27,933 INFO L175 Difference]: Start difference. First operand has 358 places, 791 transitions, 19635 flow. Second operand 6 states and 93 transitions. [2024-06-21 18:53:27,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 799 transitions, 21253 flow [2024-06-21 18:53:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 799 transitions, 20448 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:31,249 INFO L231 Difference]: Finished difference. Result has 358 places, 791 transitions, 18900 flow [2024-06-21 18:53:31,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18830, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=18900, PETRI_PLACES=358, PETRI_TRANSITIONS=791} [2024-06-21 18:53:31,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 18:53:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 791 transitions, 18900 flow [2024-06-21 18:53:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:53:31,250 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:31,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -121759962, now seen corresponding path program 1 times [2024-06-21 18:53:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992720784] [2024-06-21 18:53:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992720784] [2024-06-21 18:53:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992720784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:32,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:32,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942907197] [2024-06-21 18:53:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:32,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 791 transitions, 18900 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:32,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:32,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:34,482 INFO L124 PetriNetUnfolderBase]: 4981/7524 cut-off events. [2024-06-21 18:53:34,483 INFO L125 PetriNetUnfolderBase]: For 1211428/1211428 co-relation queries the response was YES. [2024-06-21 18:53:34,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100283 conditions, 7524 events. 4981/7524 cut-off events. For 1211428/1211428 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42392 event pairs, 1286 based on Foata normal form. 2/7526 useless extension candidates. Maximal degree in co-relation 100123. Up to 7336 conditions per place. [2024-06-21 18:53:34,595 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 781 selfloop transitions, 21 changer transitions 0/806 dead transitions. [2024-06-21 18:53:34,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 806 transitions, 20748 flow [2024-06-21 18:53:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:53:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:53:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 18:53:34,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 18:53:34,596 INFO L175 Difference]: Start difference. First operand has 358 places, 791 transitions, 18900 flow. Second operand 6 states and 103 transitions. [2024-06-21 18:53:34,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 806 transitions, 20748 flow [2024-06-21 18:53:38,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 806 transitions, 20682 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 18:53:38,081 INFO L231 Difference]: Finished difference. Result has 361 places, 794 transitions, 18930 flow [2024-06-21 18:53:38,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18834, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=18930, PETRI_PLACES=361, PETRI_TRANSITIONS=794} [2024-06-21 18:53:38,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-21 18:53:38,082 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 794 transitions, 18930 flow [2024-06-21 18:53:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:38,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:38,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:38,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:53:38,082 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash 742828488, now seen corresponding path program 2 times [2024-06-21 18:53:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837256349] [2024-06-21 18:53:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837256349] [2024-06-21 18:53:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837256349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:38,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:38,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:53:38,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444104172] [2024-06-21 18:53:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:38,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:53:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:53:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:53:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:53:38,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 794 transitions, 18930 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:38,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:38,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:53:38,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:41,265 INFO L124 PetriNetUnfolderBase]: 4940/7461 cut-off events. [2024-06-21 18:53:41,265 INFO L125 PetriNetUnfolderBase]: For 1225220/1225220 co-relation queries the response was YES. [2024-06-21 18:53:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100041 conditions, 7461 events. 4940/7461 cut-off events. For 1225220/1225220 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41921 event pairs, 1284 based on Foata normal form. 1/7462 useless extension candidates. Maximal degree in co-relation 99879. Up to 7304 conditions per place. [2024-06-21 18:53:41,370 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 785 selfloop transitions, 13 changer transitions 0/802 dead transitions. [2024-06-21 18:53:41,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 802 transitions, 20552 flow [2024-06-21 18:53:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:53:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:53:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 18:53:41,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 18:53:41,371 INFO L175 Difference]: Start difference. First operand has 361 places, 794 transitions, 18930 flow. Second operand 6 states and 95 transitions. [2024-06-21 18:53:41,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 802 transitions, 20552 flow [2024-06-21 18:53:44,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 802 transitions, 20519 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:53:44,817 INFO L231 Difference]: Finished difference. Result has 364 places, 794 transitions, 18929 flow [2024-06-21 18:53:44,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18897, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=18929, PETRI_PLACES=364, PETRI_TRANSITIONS=794} [2024-06-21 18:53:44,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 18:53:44,818 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 794 transitions, 18929 flow [2024-06-21 18:53:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:44,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:44,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:53:44,818 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:44,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1841764798, now seen corresponding path program 1 times [2024-06-21 18:53:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424899867] [2024-06-21 18:53:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:44,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:45,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:45,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424899867] [2024-06-21 18:53:45,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424899867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:45,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:45,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:53:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240948045] [2024-06-21 18:53:45,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:45,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:53:45,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:53:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:53:45,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:53:45,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 794 transitions, 18929 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) [2024-06-21 18:53:45,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:45,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:53:45,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:48,112 INFO L124 PetriNetUnfolderBase]: 4500/7072 cut-off events. [2024-06-21 18:53:48,112 INFO L125 PetriNetUnfolderBase]: For 1267491/1267642 co-relation queries the response was YES. [2024-06-21 18:53:48,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97288 conditions, 7072 events. 4500/7072 cut-off events. For 1267491/1267642 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42472 event pairs, 327 based on Foata normal form. 36/7043 useless extension candidates. Maximal degree in co-relation 97125. Up to 4463 conditions per place. [2024-06-21 18:53:48,243 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 403 selfloop transitions, 279 changer transitions 0/857 dead transitions. [2024-06-21 18:53:48,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 857 transitions, 21650 flow [2024-06-21 18:53:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:53:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:53:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:53:48,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-21 18:53:48,245 INFO L175 Difference]: Start difference. First operand has 364 places, 794 transitions, 18929 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:53:48,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 857 transitions, 21650 flow [2024-06-21 18:53:52,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 857 transitions, 21599 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:53:52,372 INFO L231 Difference]: Finished difference. Result has 368 places, 813 transitions, 20388 flow [2024-06-21 18:53:52,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18878, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20388, PETRI_PLACES=368, PETRI_TRANSITIONS=813} [2024-06-21 18:53:52,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 18:53:52,373 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 813 transitions, 20388 flow [2024-06-21 18:53:52,373 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) [2024-06-21 18:53:52,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:53:52,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:53:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:53:52,374 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:53:52,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:53:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2020783802, now seen corresponding path program 2 times [2024-06-21 18:53:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:53:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798858734] [2024-06-21 18:53:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:53:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:53:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:53:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:53:53,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:53:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798858734] [2024-06-21 18:53:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798858734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:53:53,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:53:53,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:53:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785102756] [2024-06-21 18:53:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:53:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:53:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:53:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:53:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:53:53,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 18:53:53,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 813 transitions, 20388 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:53:53,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:53:53,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 18:53:53,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:53:56,493 INFO L124 PetriNetUnfolderBase]: 5524/8217 cut-off events. [2024-06-21 18:53:56,494 INFO L125 PetriNetUnfolderBase]: For 1521453/1521467 co-relation queries the response was YES. [2024-06-21 18:53:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116297 conditions, 8217 events. 5524/8217 cut-off events. For 1521453/1521467 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46039 event pairs, 837 based on Foata normal form. 20/8237 useless extension candidates. Maximal degree in co-relation 116131. Up to 7656 conditions per place. [2024-06-21 18:53:56,841 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 735 selfloop transitions, 149 changer transitions 0/887 dead transitions. [2024-06-21 18:53:56,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 887 transitions, 24217 flow [2024-06-21 18:53:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:53:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:53:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 18:53:56,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-21 18:53:56,842 INFO L175 Difference]: Start difference. First operand has 368 places, 813 transitions, 20388 flow. Second operand 11 states and 192 transitions. [2024-06-21 18:53:56,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 887 transitions, 24217 flow