./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:43:35,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:43:35,179 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:43:35,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:43:35,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:43:35,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:43:35,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:43:35,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:43:35,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:43:35,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:43:35,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:43:35,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:43:35,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:43:35,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:43:35,224 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:43:35,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:43:35,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:43:35,225 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:43:35,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:43:35,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:43:35,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:43:35,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:43:35,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:43:35,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:43:35,227 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:43:35,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:43:35,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:43:35,228 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:43:35,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:43:35,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:43:35,229 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:43:35,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:43:35,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:43:35,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:43:35,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:43:35,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:43:35,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:43:35,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:43:35,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:43:35,231 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:43:35,231 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:43:35,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:43:35,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:43:35,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:43:35,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:43:35,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:43:35,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:43:35,536 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:43:35,537 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:43:35,538 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 18:43:35,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:43:35,654 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:43:35,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:43:36,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:43:37,007 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:43:37,008 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:43:37,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f847e4e2/462b58f117bf46e7b05074de9e592a70/FLAG52ecdc0fd [2024-06-21 18:43:37,035 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f847e4e2/462b58f117bf46e7b05074de9e592a70 [2024-06-21 18:43:37,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:43:37,037 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:43:37,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:43:37,040 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:43:37,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:43:37,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:43:35" (1/2) ... [2024-06-21 18:43:37,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a1758b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:43:37, skipping insertion in model container [2024-06-21 18:43:37,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:43:35" (1/2) ... [2024-06-21 18:43:37,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@207ba244 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:43:37, skipping insertion in model container [2024-06-21 18:43:37,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:43:37" (2/2) ... [2024-06-21 18:43:37,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a1758b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37, skipping insertion in model container [2024-06-21 18:43:37,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:43:37" (2/2) ... [2024-06-21 18:43:37,053 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:43:37,102 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:43:37,103 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:43:37,103 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:43:37,103 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EBX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$r_buff1_thd2 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd2 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 18:43:37,104 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:43:37,104 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-21 18:43:37,173 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:43:37,575 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:43:37,588 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:43:37,768 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:43:37,802 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:43:37,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37 WrapperNode [2024-06-21 18:43:37,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:43:37,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:43:37,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:43:37,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:43:37,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,890 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-21 18:43:37,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:43:37,892 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:43:37,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:43:37,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:43:37,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,932 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 18:43:37,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:43:37,971 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:43:37,971 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:43:37,972 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:43:37,972 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (1/1) ... [2024-06-21 18:43:37,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:43:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:43:38,009 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 18:43:38,016 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 18:43:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:43:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:43:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:43:38,043 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:43:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:43:38,043 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:43:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:43:38,044 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:43:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:43:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:43:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:43:38,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:43:38,045 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 18:43:38,188 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:43:38,191 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:43:38,805 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:43:38,805 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:43:39,014 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:43:39,014 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:43:39,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:43:39 BoogieIcfgContainer [2024-06-21 18:43:39,015 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:43:39,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:43:39,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:43:39,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:43:39,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:43:35" (1/4) ... [2024-06-21 18:43:39,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5082884a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:43:39, skipping insertion in model container [2024-06-21 18:43:39,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:43:37" (2/4) ... [2024-06-21 18:43:39,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5082884a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:43:39, skipping insertion in model container [2024-06-21 18:43:39,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:43:37" (3/4) ... [2024-06-21 18:43:39,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5082884a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:43:39, skipping insertion in model container [2024-06-21 18:43:39,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:43:39" (4/4) ... [2024-06-21 18:43:39,026 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-21 18:43:39,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:43:39,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:43:39,042 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:43:39,097 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:43:39,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:43:39,166 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 18:43:39,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:43:39,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:43:39,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 18:43:39,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 18:43:39,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:43:39,197 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;@355594c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:43:39,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:43:39,204 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:43:39,204 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:43:39,204 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:43:39,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:39,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:43:39,206 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 18:43:39,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:39,213 INFO L85 PathProgramCache]: Analyzing trace with hash 372387487, now seen corresponding path program 1 times [2024-06-21 18:43:39,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045169528] [2024-06-21 18:43:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:39,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:40,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045169528] [2024-06-21 18:43:40,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045169528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:40,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:43:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004176306] [2024-06-21 18:43:40,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:43:40,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:43:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:43:40,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 18:43:40,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:40,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:40,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 18:43:40,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:41,284 INFO L124 PetriNetUnfolderBase]: 1407/2253 cut-off events. [2024-06-21 18:43:41,285 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 18:43:41,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2253 events. 1407/2253 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11626 event pairs, 989 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 4445. Up to 2105 conditions per place. [2024-06-21 18:43:41,307 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 18:43:41,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-21 18:43:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:43:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:43:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 18:43:41,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-21 18:43:41,320 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-21 18:43:41,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-21 18:43:41,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:43:41,328 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 18:43:41,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 18:43:41,333 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 18:43:41,333 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 18:43:41,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:41,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:41,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:41,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:43:41,335 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 18:43:41,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1382137662, now seen corresponding path program 1 times [2024-06-21 18:43:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609183033] [2024-06-21 18:43:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:42,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:42,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609183033] [2024-06-21 18:43:42,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609183033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:42,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:42,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:43:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991637769] [2024-06-21 18:43:42,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:43:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:43:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:43:42,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 18:43:42,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:42,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:42,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 18:43:42,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:43,024 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-21 18:43:43,025 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-21 18:43:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 2544 events. 1653/2544 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12794 event pairs, 1038 based on Foata normal form. 3/2544 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-21 18:43:43,041 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 18:43:43,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-21 18:43:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:43:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:43:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 18:43:43,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 18:43:43,045 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-21 18:43:43,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-21 18:43:43,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:43:43,052 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 18:43:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 18:43:43,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 18:43:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 18:43:43,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:43,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:43,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:43,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:43:43,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:43:43,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash -103403870, now seen corresponding path program 1 times [2024-06-21 18:43:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:43,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376023202] [2024-06-21 18:43:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:44,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:44,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376023202] [2024-06-21 18:43:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376023202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:44,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:44,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:43:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984778548] [2024-06-21 18:43:44,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:43:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:43:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:43:44,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:43:44,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:44,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:44,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:43:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:44,872 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-21 18:43:44,872 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-21 18:43:44,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 2973 events. 1947/2973 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14718 event pairs, 1135 based on Foata normal form. 3/2973 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-21 18:43:44,890 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-21 18:43:44,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-21 18:43:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:43:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:43:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 18:43:44,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-21 18:43:44,896 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-21 18:43:44,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-21 18:43:44,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:43:44,900 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-21 18:43:44,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 18:43:44,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 18:43:44,902 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-21 18:43:44,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:44,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:44,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:44,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:43:44,903 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 18:43:44,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2086851605, now seen corresponding path program 1 times [2024-06-21 18:43:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:44,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905108971] [2024-06-21 18:43:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:46,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:46,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905108971] [2024-06-21 18:43:46,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905108971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:46,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:46,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:43:46,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356428904] [2024-06-21 18:43:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:46,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:43:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:43:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:43:46,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:43:46,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:46,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:46,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:43:46,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:46,720 INFO L124 PetriNetUnfolderBase]: 1941/2964 cut-off events. [2024-06-21 18:43:46,721 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2024-06-21 18:43:46,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 2964 events. 1941/2964 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14663 event pairs, 989 based on Foata normal form. 3/2965 useless extension candidates. Maximal degree in co-relation 8034. Up to 2829 conditions per place. [2024-06-21 18:43:46,743 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 18:43:46,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 402 flow [2024-06-21 18:43:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:43:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:43:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 18:43:46,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2024-06-21 18:43:46,746 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 143 transitions. [2024-06-21 18:43:46,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 402 flow [2024-06-21 18:43:46,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:43:46,751 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-21 18:43:46,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 18:43:46,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 18:43:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-21 18:43:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:46,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:43:46,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:43:46,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash -586820063, now seen corresponding path program 1 times [2024-06-21 18:43:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962242233] [2024-06-21 18:43:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:48,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962242233] [2024-06-21 18:43:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962242233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:48,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:43:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106540047] [2024-06-21 18:43:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:43:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:43:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:43:48,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:43:48,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:48,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:48,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:43:48,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:49,325 INFO L124 PetriNetUnfolderBase]: 1935/2939 cut-off events. [2024-06-21 18:43:49,325 INFO L125 PetriNetUnfolderBase]: For 4530/4530 co-relation queries the response was YES. [2024-06-21 18:43:49,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8670 conditions, 2939 events. 1935/2939 cut-off events. For 4530/4530 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14458 event pairs, 843 based on Foata normal form. 3/2940 useless extension candidates. Maximal degree in co-relation 8654. Up to 2805 conditions per place. [2024-06-21 18:43:49,344 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 62 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 18:43:49,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 84 transitions, 480 flow [2024-06-21 18:43:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:43:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:43:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 18:43:49,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481727574750831 [2024-06-21 18:43:49,346 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 7 states and 165 transitions. [2024-06-21 18:43:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 84 transitions, 480 flow [2024-06-21 18:43:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 446 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:43:49,350 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 248 flow [2024-06-21 18:43:49,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 18:43:49,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 18:43:49,351 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 248 flow [2024-06-21 18:43:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:49,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:49,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:43:49,353 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 18:43:49,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1624971842, now seen corresponding path program 1 times [2024-06-21 18:43:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282433856] [2024-06-21 18:43:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:50,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:50,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282433856] [2024-06-21 18:43:50,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282433856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:50,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:50,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:43:50,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23939022] [2024-06-21 18:43:50,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:50,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:43:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:43:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:43:50,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:43:50,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:50,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:50,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:43:50,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:51,171 INFO L124 PetriNetUnfolderBase]: 1556/2546 cut-off events. [2024-06-21 18:43:51,172 INFO L125 PetriNetUnfolderBase]: For 5369/5369 co-relation queries the response was YES. [2024-06-21 18:43:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7889 conditions, 2546 events. 1556/2546 cut-off events. For 5369/5369 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13467 event pairs, 678 based on Foata normal form. 2/2504 useless extension candidates. Maximal degree in co-relation 7871. Up to 2304 conditions per place. [2024-06-21 18:43:51,190 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 46 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-21 18:43:51,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 414 flow [2024-06-21 18:43:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:43:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:43:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 18:43:51,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-06-21 18:43:51,192 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 248 flow. Second operand 5 states and 107 transitions. [2024-06-21 18:43:51,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 414 flow [2024-06-21 18:43:51,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 368 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:43:51,197 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 269 flow [2024-06-21 18:43:51,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 18:43:51,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 18:43:51,198 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 269 flow [2024-06-21 18:43:51,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:51,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:51,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:51,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:43:51,199 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 18:43:51,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1165481396, now seen corresponding path program 1 times [2024-06-21 18:43:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:51,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078055894] [2024-06-21 18:43:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:52,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:52,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078055894] [2024-06-21 18:43:52,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078055894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:52,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:52,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:43:52,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894629014] [2024-06-21 18:43:52,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:52,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:43:52,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:43:52,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:43:52,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:43:52,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:52,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:52,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:43:52,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:53,339 INFO L124 PetriNetUnfolderBase]: 1842/2876 cut-off events. [2024-06-21 18:43:53,340 INFO L125 PetriNetUnfolderBase]: For 8222/8222 co-relation queries the response was YES. [2024-06-21 18:43:53,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2876 events. 1842/2876 cut-off events. For 8222/8222 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14509 event pairs, 802 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 9593. Up to 2684 conditions per place. [2024-06-21 18:43:53,362 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 55 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-21 18:43:53,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 539 flow [2024-06-21 18:43:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:43:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:43:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 18:43:53,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 18:43:53,365 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 269 flow. Second operand 7 states and 138 transitions. [2024-06-21 18:43:53,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 539 flow [2024-06-21 18:43:53,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 515 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 18:43:53,371 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 378 flow [2024-06-21 18:43:53,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-21 18:43:53,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-21 18:43:53,373 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 378 flow [2024-06-21 18:43:53,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:53,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:53,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:53,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:43:53,373 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 18:43:53,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1769909055, now seen corresponding path program 1 times [2024-06-21 18:43:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106328691] [2024-06-21 18:43:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:53,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:54,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:54,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106328691] [2024-06-21 18:43:54,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106328691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:54,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:54,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:43:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947590803] [2024-06-21 18:43:54,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:54,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:43:54,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:43:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:43:54,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:43:54,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 378 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:54,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:54,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:43:54,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:55,495 INFO L124 PetriNetUnfolderBase]: 1914/3002 cut-off events. [2024-06-21 18:43:55,495 INFO L125 PetriNetUnfolderBase]: For 12233/12243 co-relation queries the response was YES. [2024-06-21 18:43:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 3002 events. 1914/3002 cut-off events. For 12233/12243 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15195 event pairs, 808 based on Foata normal form. 2/2990 useless extension candidates. Maximal degree in co-relation 11099. Up to 2787 conditions per place. [2024-06-21 18:43:55,517 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-21 18:43:55,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 624 flow [2024-06-21 18:43:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:43:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:43:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:43:55,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 18:43:55,519 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 378 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:43:55,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 624 flow [2024-06-21 18:43:55,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 603 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 18:43:55,527 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 461 flow [2024-06-21 18:43:55,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-21 18:43:55,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-21 18:43:55,528 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 461 flow [2024-06-21 18:43:55,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:55,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:55,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:55,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:43:55,529 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 18:43:55,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1770175965, now seen corresponding path program 2 times [2024-06-21 18:43:55,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:55,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629508459] [2024-06-21 18:43:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:56,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629508459] [2024-06-21 18:43:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629508459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:56,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:56,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:43:56,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182228801] [2024-06-21 18:43:56,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:56,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:43:56,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:43:56,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:43:57,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:43:57,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:57,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:57,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:43:57,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:57,673 INFO L124 PetriNetUnfolderBase]: 1925/3020 cut-off events. [2024-06-21 18:43:57,674 INFO L125 PetriNetUnfolderBase]: For 15320/15336 co-relation queries the response was YES. [2024-06-21 18:43:57,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11912 conditions, 3020 events. 1925/3020 cut-off events. For 15320/15336 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15300 event pairs, 813 based on Foata normal form. 6/3011 useless extension candidates. Maximal degree in co-relation 11884. Up to 2774 conditions per place. [2024-06-21 18:43:57,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2024-06-21 18:43:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 767 flow [2024-06-21 18:43:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:43:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:43:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 18:43:57,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 18:43:57,700 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 461 flow. Second operand 6 states and 126 transitions. [2024-06-21 18:43:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 767 flow [2024-06-21 18:43:57,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 731 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 18:43:57,711 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 553 flow [2024-06-21 18:43:57,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 18:43:57,712 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-21 18:43:57,712 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 553 flow [2024-06-21 18:43:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:57,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:43:57,713 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 18:43:57,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 230431005, now seen corresponding path program 3 times [2024-06-21 18:43:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:57,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040555748] [2024-06-21 18:43:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:57,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:43:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:43:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:43:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040555748] [2024-06-21 18:43:58,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040555748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:43:58,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:43:58,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:43:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475734910] [2024-06-21 18:43:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:43:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:43:58,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:43:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:43:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:43:58,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:43:58,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:58,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:43:58,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:43:58,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:43:59,630 INFO L124 PetriNetUnfolderBase]: 1934/3032 cut-off events. [2024-06-21 18:43:59,630 INFO L125 PetriNetUnfolderBase]: For 18811/18823 co-relation queries the response was YES. [2024-06-21 18:43:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12611 conditions, 3032 events. 1934/3032 cut-off events. For 18811/18823 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15322 event pairs, 807 based on Foata normal form. 2/3021 useless extension candidates. Maximal degree in co-relation 12581. Up to 2809 conditions per place. [2024-06-21 18:43:59,653 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-21 18:43:59,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 844 flow [2024-06-21 18:43:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:43:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:43:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 18:43:59,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 18:43:59,655 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 553 flow. Second operand 7 states and 142 transitions. [2024-06-21 18:43:59,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 844 flow [2024-06-21 18:43:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 785 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 18:43:59,669 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 615 flow [2024-06-21 18:43:59,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=615, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-21 18:43:59,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-21 18:43:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 615 flow [2024-06-21 18:43:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:43:59,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:43:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:43:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:43:59,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:43:59,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:43:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash -253825432, now seen corresponding path program 1 times [2024-06-21 18:43:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:43:59,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742285590] [2024-06-21 18:43:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:43:59,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:43:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:01,295 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 18:44:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742285590] [2024-06-21 18:44:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742285590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:01,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187167018] [2024-06-21 18:44:01,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:01,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 18:44:01,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:01,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:01,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 18:44:01,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:02,051 INFO L124 PetriNetUnfolderBase]: 2034/3106 cut-off events. [2024-06-21 18:44:02,051 INFO L125 PetriNetUnfolderBase]: For 21178/21190 co-relation queries the response was YES. [2024-06-21 18:44:02,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13214 conditions, 3106 events. 2034/3106 cut-off events. For 21178/21190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15188 event pairs, 645 based on Foata normal form. 6/3085 useless extension candidates. Maximal degree in co-relation 13182. Up to 2881 conditions per place. [2024-06-21 18:44:02,072 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-21 18:44:02,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 985 flow [2024-06-21 18:44:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:44:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-21 18:44:02,074 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 615 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:44:02,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 985 flow [2024-06-21 18:44:02,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 927 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 18:44:02,088 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 642 flow [2024-06-21 18:44:02,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-21 18:44:02,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 18:44:02,089 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 642 flow [2024-06-21 18:44:02,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:02,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:02,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:02,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:44:02,090 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 18:44:02,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1770185885, now seen corresponding path program 1 times [2024-06-21 18:44:02,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:02,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886433280] [2024-06-21 18:44:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:02,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:04,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886433280] [2024-06-21 18:44:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886433280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:04,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:04,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676255880] [2024-06-21 18:44:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:04,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:04,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:04,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:44:04,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 642 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:04,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:04,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:44:04,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:04,890 INFO L124 PetriNetUnfolderBase]: 1869/2943 cut-off events. [2024-06-21 18:44:04,890 INFO L125 PetriNetUnfolderBase]: For 24486/24486 co-relation queries the response was YES. [2024-06-21 18:44:04,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 2943 events. 1869/2943 cut-off events. For 24486/24486 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14958 event pairs, 733 based on Foata normal form. 3/2944 useless extension candidates. Maximal degree in co-relation 13041. Up to 2722 conditions per place. [2024-06-21 18:44:04,917 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 81 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-21 18:44:04,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 988 flow [2024-06-21 18:44:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 18:44:04,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:44:04,919 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 642 flow. Second operand 8 states and 156 transitions. [2024-06-21 18:44:04,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 988 flow [2024-06-21 18:44:04,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 909 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:04,939 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 662 flow [2024-06-21 18:44:04,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=662, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-21 18:44:04,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 18:44:04,940 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 662 flow [2024-06-21 18:44:04,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:04,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:04,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:04,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:44:04,941 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 18:44:04,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1195474085, now seen corresponding path program 1 times [2024-06-21 18:44:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409543257] [2024-06-21 18:44:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:06,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:06,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409543257] [2024-06-21 18:44:06,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409543257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:06,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:06,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402659654] [2024-06-21 18:44:06,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:06,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:06,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:06,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 662 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:06,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:06,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:06,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:06,955 INFO L124 PetriNetUnfolderBase]: 2107/3200 cut-off events. [2024-06-21 18:44:06,955 INFO L125 PetriNetUnfolderBase]: For 31668/31685 co-relation queries the response was YES. [2024-06-21 18:44:06,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 3200 events. 2107/3200 cut-off events. For 31668/31685 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15538 event pairs, 798 based on Foata normal form. 3/3175 useless extension candidates. Maximal degree in co-relation 14995. Up to 3004 conditions per place. [2024-06-21 18:44:06,985 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-06-21 18:44:06,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1000 flow [2024-06-21 18:44:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:44:06,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 18:44:06,987 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 662 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:44:06,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1000 flow [2024-06-21 18:44:07,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 931 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:07,011 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 728 flow [2024-06-21 18:44:07,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=728, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-21 18:44:07,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-21 18:44:07,012 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 728 flow [2024-06-21 18:44:07,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:07,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:07,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:07,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:44:07,013 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 18:44:07,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452243, now seen corresponding path program 2 times [2024-06-21 18:44:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:07,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588009607] [2024-06-21 18:44:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:08,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588009607] [2024-06-21 18:44:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588009607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214025749] [2024-06-21 18:44:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:08,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:09,021 INFO L124 PetriNetUnfolderBase]: 2118/3216 cut-off events. [2024-06-21 18:44:09,021 INFO L125 PetriNetUnfolderBase]: For 36699/36718 co-relation queries the response was YES. [2024-06-21 18:44:09,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 3216 events. 2118/3216 cut-off events. For 36699/36718 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15634 event pairs, 798 based on Foata normal form. 3/3191 useless extension candidates. Maximal degree in co-relation 15737. Up to 2994 conditions per place. [2024-06-21 18:44:09,039 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 33 changer transitions 0/121 dead transitions. [2024-06-21 18:44:09,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 1054 flow [2024-06-21 18:44:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:44:09,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 18:44:09,040 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 728 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:44:09,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 1054 flow [2024-06-21 18:44:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 993 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:09,058 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 792 flow [2024-06-21 18:44:09,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=792, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-21 18:44:09,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-21 18:44:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 792 flow [2024-06-21 18:44:09,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:09,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:09,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:09,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:44:09,060 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 18:44:09,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452491, now seen corresponding path program 1 times [2024-06-21 18:44:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438828684] [2024-06-21 18:44:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:10,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438828684] [2024-06-21 18:44:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438828684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:10,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:10,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:10,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051538453] [2024-06-21 18:44:10,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:10,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:10,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:10,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:10,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 792 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:10,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:10,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:10,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:11,018 INFO L124 PetriNetUnfolderBase]: 2230/3356 cut-off events. [2024-06-21 18:44:11,019 INFO L125 PetriNetUnfolderBase]: For 43611/43615 co-relation queries the response was YES. [2024-06-21 18:44:11,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3356 events. 2230/3356 cut-off events. For 43611/43615 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16199 event pairs, 824 based on Foata normal form. 7/3360 useless extension candidates. Maximal degree in co-relation 17050. Up to 3189 conditions per place. [2024-06-21 18:44:11,037 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 34 changer transitions 0/137 dead transitions. [2024-06-21 18:44:11,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1328 flow [2024-06-21 18:44:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:44:11,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 18:44:11,039 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 792 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:44:11,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1328 flow [2024-06-21 18:44:11,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1229 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:11,062 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 934 flow [2024-06-21 18:44:11,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-21 18:44:11,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 18:44:11,063 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 934 flow [2024-06-21 18:44:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:11,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:11,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:44:11,063 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 18:44:11,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -958822317, now seen corresponding path program 2 times [2024-06-21 18:44:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381508993] [2024-06-21 18:44:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381508993] [2024-06-21 18:44:12,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381508993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:12,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:12,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:12,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615077619] [2024-06-21 18:44:12,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:12,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:12,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:12,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:12,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:12,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:12,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:13,333 INFO L124 PetriNetUnfolderBase]: 2256/3395 cut-off events. [2024-06-21 18:44:13,333 INFO L125 PetriNetUnfolderBase]: For 51890/51898 co-relation queries the response was YES. [2024-06-21 18:44:13,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18419 conditions, 3395 events. 2256/3395 cut-off events. For 51890/51898 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16464 event pairs, 822 based on Foata normal form. 11/3402 useless extension candidates. Maximal degree in co-relation 18378. Up to 3119 conditions per place. [2024-06-21 18:44:13,350 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 84 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-21 18:44:13,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 1544 flow [2024-06-21 18:44:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:44:13,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:44:13,353 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 934 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:44:13,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 1544 flow [2024-06-21 18:44:13,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1488 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 18:44:13,379 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1188 flow [2024-06-21 18:44:13,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-21 18:44:13,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 18:44:13,380 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1188 flow [2024-06-21 18:44:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:13,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:13,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:13,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:44:13,380 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 18:44:13,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1401995293, now seen corresponding path program 3 times [2024-06-21 18:44:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265271234] [2024-06-21 18:44:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:13,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:14,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:14,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265271234] [2024-06-21 18:44:14,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265271234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:14,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:14,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:14,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21859970] [2024-06-21 18:44:14,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:14,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:14,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:14,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1188 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:14,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:14,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:14,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:15,396 INFO L124 PetriNetUnfolderBase]: 2233/3371 cut-off events. [2024-06-21 18:44:15,396 INFO L125 PetriNetUnfolderBase]: For 59518/59567 co-relation queries the response was YES. [2024-06-21 18:44:15,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 3371 events. 2233/3371 cut-off events. For 59518/59567 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16296 event pairs, 790 based on Foata normal form. 9/3353 useless extension candidates. Maximal degree in co-relation 19462. Up to 3070 conditions per place. [2024-06-21 18:44:15,417 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 94 selfloop transitions, 44 changer transitions 0/154 dead transitions. [2024-06-21 18:44:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1702 flow [2024-06-21 18:44:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:44:15,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 18:44:15,420 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1188 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:44:15,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1702 flow [2024-06-21 18:44:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1617 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:15,473 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1321 flow [2024-06-21 18:44:15,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-21 18:44:15,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 18:44:15,474 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1321 flow [2024-06-21 18:44:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:15,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:15,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:15,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:44:15,474 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 18:44:15,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash -959118987, now seen corresponding path program 3 times [2024-06-21 18:44:15,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:15,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379955462] [2024-06-21 18:44:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379955462] [2024-06-21 18:44:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379955462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:16,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826796735] [2024-06-21 18:44:16,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:16,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:16,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:16,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1321 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:16,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:16,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:17,548 INFO L124 PetriNetUnfolderBase]: 2301/3459 cut-off events. [2024-06-21 18:44:17,548 INFO L125 PetriNetUnfolderBase]: For 63895/63899 co-relation queries the response was YES. [2024-06-21 18:44:17,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20295 conditions, 3459 events. 2301/3459 cut-off events. For 63895/63899 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16742 event pairs, 824 based on Foata normal form. 7/3462 useless extension candidates. Maximal degree in co-relation 20249. Up to 3164 conditions per place. [2024-06-21 18:44:17,569 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2024-06-21 18:44:17,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 164 transitions, 1934 flow [2024-06-21 18:44:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:44:17,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:44:17,572 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1321 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:44:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 164 transitions, 1934 flow [2024-06-21 18:44:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 164 transitions, 1858 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:17,606 INFO L231 Difference]: Finished difference. Result has 112 places, 142 transitions, 1493 flow [2024-06-21 18:44:17,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=112, PETRI_TRANSITIONS=142} [2024-06-21 18:44:17,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 18:44:17,607 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 142 transitions, 1493 flow [2024-06-21 18:44:17,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:17,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:17,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:17,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:44:17,608 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 18:44:17,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1446752229, now seen corresponding path program 4 times [2024-06-21 18:44:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980652242] [2024-06-21 18:44:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:18,750 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 18:44:18,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:18,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980652242] [2024-06-21 18:44:18,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980652242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:18,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:18,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397535964] [2024-06-21 18:44:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:18,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 142 transitions, 1493 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:18,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:19,504 INFO L124 PetriNetUnfolderBase]: 2311/3481 cut-off events. [2024-06-21 18:44:19,505 INFO L125 PetriNetUnfolderBase]: For 70554/70601 co-relation queries the response was YES. [2024-06-21 18:44:19,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21140 conditions, 3481 events. 2311/3481 cut-off events. For 70554/70601 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16845 event pairs, 780 based on Foata normal form. 7/3464 useless extension candidates. Maximal degree in co-relation 21091. Up to 3237 conditions per place. [2024-06-21 18:44:19,525 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 125 selfloop transitions, 40 changer transitions 0/183 dead transitions. [2024-06-21 18:44:19,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2045 flow [2024-06-21 18:44:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:44:19,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:44:19,527 INFO L175 Difference]: Start difference. First operand has 112 places, 142 transitions, 1493 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:44:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2045 flow [2024-06-21 18:44:19,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1927 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:19,571 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1639 flow [2024-06-21 18:44:19,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1639, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-21 18:44:19,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 18:44:19,572 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1639 flow [2024-06-21 18:44:19,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:19,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:19,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:44:19,573 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 18:44:19,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1730113435, now seen corresponding path program 5 times [2024-06-21 18:44:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:19,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730348892] [2024-06-21 18:44:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:20,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730348892] [2024-06-21 18:44:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730348892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:20,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:20,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:20,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518111934] [2024-06-21 18:44:20,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:20,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:20,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:20,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1639 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:20,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:20,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:20,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:21,290 INFO L124 PetriNetUnfolderBase]: 2343/3528 cut-off events. [2024-06-21 18:44:21,290 INFO L125 PetriNetUnfolderBase]: For 76723/76772 co-relation queries the response was YES. [2024-06-21 18:44:21,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21745 conditions, 3528 events. 2343/3528 cut-off events. For 76723/76772 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17073 event pairs, 780 based on Foata normal form. 9/3513 useless extension candidates. Maximal degree in co-relation 21694. Up to 3276 conditions per place. [2024-06-21 18:44:21,313 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 132 selfloop transitions, 47 changer transitions 0/197 dead transitions. [2024-06-21 18:44:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2275 flow [2024-06-21 18:44:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:44:21,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:44:21,317 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1639 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:44:21,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2275 flow [2024-06-21 18:44:21,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 2138 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:21,373 INFO L231 Difference]: Finished difference. Result has 123 places, 171 transitions, 1849 flow [2024-06-21 18:44:21,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1849, PETRI_PLACES=123, PETRI_TRANSITIONS=171} [2024-06-21 18:44:21,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-21 18:44:21,374 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 171 transitions, 1849 flow [2024-06-21 18:44:21,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:21,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:21,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:21,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:44:21,375 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 18:44:21,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1095093733, now seen corresponding path program 6 times [2024-06-21 18:44:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:21,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985123745] [2024-06-21 18:44:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:22,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:22,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985123745] [2024-06-21 18:44:22,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985123745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:22,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:22,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6441245] [2024-06-21 18:44:22,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:22,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:22,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 171 transitions, 1849 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:22,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:22,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:22,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:23,373 INFO L124 PetriNetUnfolderBase]: 2345/3532 cut-off events. [2024-06-21 18:44:23,373 INFO L125 PetriNetUnfolderBase]: For 82335/82380 co-relation queries the response was YES. [2024-06-21 18:44:23,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22035 conditions, 3532 events. 2345/3532 cut-off events. For 82335/82380 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17094 event pairs, 786 based on Foata normal form. 5/3513 useless extension candidates. Maximal degree in co-relation 21982. Up to 3237 conditions per place. [2024-06-21 18:44:23,396 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-21 18:44:23,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2307 flow [2024-06-21 18:44:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:44:23,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 18:44:23,397 INFO L175 Difference]: Start difference. First operand has 123 places, 171 transitions, 1849 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:44:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2307 flow [2024-06-21 18:44:23,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 198 transitions, 2153 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 18:44:23,461 INFO L231 Difference]: Finished difference. Result has 124 places, 174 transitions, 1855 flow [2024-06-21 18:44:23,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1855, PETRI_PLACES=124, PETRI_TRANSITIONS=174} [2024-06-21 18:44:23,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 18:44:23,461 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 174 transitions, 1855 flow [2024-06-21 18:44:23,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:23,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:23,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:23,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:44:23,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:44:23,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1095093485, now seen corresponding path program 4 times [2024-06-21 18:44:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:23,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072097069] [2024-06-21 18:44:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:23,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072097069] [2024-06-21 18:44:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072097069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:24,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:24,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:24,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459690642] [2024-06-21 18:44:24,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:24,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:24,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 174 transitions, 1855 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:24,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:25,459 INFO L124 PetriNetUnfolderBase]: 2397/3606 cut-off events. [2024-06-21 18:44:25,459 INFO L125 PetriNetUnfolderBase]: For 87703/87705 co-relation queries the response was YES. [2024-06-21 18:44:25,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22543 conditions, 3606 events. 2397/3606 cut-off events. For 87703/87705 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17585 event pairs, 833 based on Foata normal form. 5/3609 useless extension candidates. Maximal degree in co-relation 22491. Up to 3392 conditions per place. [2024-06-21 18:44:25,479 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 145 selfloop transitions, 46 changer transitions 0/213 dead transitions. [2024-06-21 18:44:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2618 flow [2024-06-21 18:44:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:44:25,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 18:44:25,481 INFO L175 Difference]: Start difference. First operand has 124 places, 174 transitions, 1855 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:44:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2618 flow [2024-06-21 18:44:25,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 2394 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 18:44:25,535 INFO L231 Difference]: Finished difference. Result has 126 places, 185 transitions, 1898 flow [2024-06-21 18:44:25,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1898, PETRI_PLACES=126, PETRI_TRANSITIONS=185} [2024-06-21 18:44:25,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 18:44:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 185 transitions, 1898 flow [2024-06-21 18:44:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:25,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:25,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:44:25,536 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 18:44:25,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash -958811405, now seen corresponding path program 1 times [2024-06-21 18:44:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197287098] [2024-06-21 18:44:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197287098] [2024-06-21 18:44:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197287098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099566959] [2024-06-21 18:44:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:27,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:44:27,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 185 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:27,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:27,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:44:27,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:28,105 INFO L124 PetriNetUnfolderBase]: 2113/3324 cut-off events. [2024-06-21 18:44:28,105 INFO L125 PetriNetUnfolderBase]: For 82227/82227 co-relation queries the response was YES. [2024-06-21 18:44:28,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20547 conditions, 3324 events. 2113/3324 cut-off events. For 82227/82227 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17035 event pairs, 718 based on Foata normal form. 6/3328 useless extension candidates. Maximal degree in co-relation 20493. Up to 3015 conditions per place. [2024-06-21 18:44:28,128 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 164 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-21 18:44:28,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 213 transitions, 2502 flow [2024-06-21 18:44:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 18:44:28,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 18:44:28,129 INFO L175 Difference]: Start difference. First operand has 126 places, 185 transitions, 1898 flow. Second operand 8 states and 164 transitions. [2024-06-21 18:44:28,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 213 transitions, 2502 flow [2024-06-21 18:44:28,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 213 transitions, 2349 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:44:28,184 INFO L231 Difference]: Finished difference. Result has 126 places, 188 transitions, 1865 flow [2024-06-21 18:44:28,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1865, PETRI_PLACES=126, PETRI_TRANSITIONS=188} [2024-06-21 18:44:28,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 18:44:28,185 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 188 transitions, 1865 flow [2024-06-21 18:44:28,185 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 18:44:28,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:28,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:28,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:44:28,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:44:28,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1404750099, now seen corresponding path program 1 times [2024-06-21 18:44:28,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:28,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648911629] [2024-06-21 18:44:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648911629] [2024-06-21 18:44:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648911629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:29,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:29,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:44:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124048977] [2024-06-21 18:44:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:29,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:44:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:44:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:44:29,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:44:29,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 188 transitions, 1865 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:29,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:29,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:44:29,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:30,021 INFO L124 PetriNetUnfolderBase]: 2111/3320 cut-off events. [2024-06-21 18:44:30,022 INFO L125 PetriNetUnfolderBase]: For 86307/86307 co-relation queries the response was YES. [2024-06-21 18:44:30,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20861 conditions, 3320 events. 2111/3320 cut-off events. For 86307/86307 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16932 event pairs, 737 based on Foata normal form. 1/3319 useless extension candidates. Maximal degree in co-relation 20809. Up to 3084 conditions per place. [2024-06-21 18:44:30,041 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 162 selfloop transitions, 10 changer transitions 0/195 dead transitions. [2024-06-21 18:44:30,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 195 transitions, 2231 flow [2024-06-21 18:44:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:44:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:44:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 18:44:30,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:44:30,042 INFO L175 Difference]: Start difference. First operand has 126 places, 188 transitions, 1865 flow. Second operand 5 states and 98 transitions. [2024-06-21 18:44:30,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 195 transitions, 2231 flow [2024-06-21 18:44:30,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 195 transitions, 2125 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:30,095 INFO L231 Difference]: Finished difference. Result has 125 places, 188 transitions, 1787 flow [2024-06-21 18:44:30,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1787, PETRI_PLACES=125, PETRI_TRANSITIONS=188} [2024-06-21 18:44:30,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 18:44:30,095 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 188 transitions, 1787 flow [2024-06-21 18:44:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:30,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:44:30,096 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 18:44:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1594860028, now seen corresponding path program 1 times [2024-06-21 18:44:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605968343] [2024-06-21 18:44:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605968343] [2024-06-21 18:44:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605968343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:31,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:31,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774586678] [2024-06-21 18:44:31,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:31,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:31,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:31,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 188 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:31,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:31,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:31,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:32,318 INFO L124 PetriNetUnfolderBase]: 2417/3659 cut-off events. [2024-06-21 18:44:32,318 INFO L125 PetriNetUnfolderBase]: For 107920/107922 co-relation queries the response was YES. [2024-06-21 18:44:32,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 3659 events. 2417/3659 cut-off events. For 107920/107922 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17839 event pairs, 775 based on Foata normal form. 6/3659 useless extension candidates. Maximal degree in co-relation 23573. Up to 3303 conditions per place. [2024-06-21 18:44:32,338 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 155 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-21 18:44:32,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 224 transitions, 2371 flow [2024-06-21 18:44:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:44:32,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:44:32,340 INFO L175 Difference]: Start difference. First operand has 125 places, 188 transitions, 1787 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:44:32,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 224 transitions, 2371 flow [2024-06-21 18:44:32,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 224 transitions, 2350 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:32,404 INFO L231 Difference]: Finished difference. Result has 131 places, 199 transitions, 1978 flow [2024-06-21 18:44:32,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1978, PETRI_PLACES=131, PETRI_TRANSITIONS=199} [2024-06-21 18:44:32,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 18:44:32,404 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 199 transitions, 1978 flow [2024-06-21 18:44:32,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:32,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:32,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:32,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:44:32,405 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 18:44:32,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009758, now seen corresponding path program 2 times [2024-06-21 18:44:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317278252] [2024-06-21 18:44:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317278252] [2024-06-21 18:44:33,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317278252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:33,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:33,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830640258] [2024-06-21 18:44:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:33,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:33,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:33,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 199 transitions, 1978 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:33,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:33,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:33,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:34,472 INFO L124 PetriNetUnfolderBase]: 2428/3673 cut-off events. [2024-06-21 18:44:34,472 INFO L125 PetriNetUnfolderBase]: For 115735/115753 co-relation queries the response was YES. [2024-06-21 18:44:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24677 conditions, 3673 events. 2428/3673 cut-off events. For 115735/115753 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17982 event pairs, 733 based on Foata normal form. 8/3670 useless extension candidates. Maximal degree in co-relation 24622. Up to 3320 conditions per place. [2024-06-21 18:44:34,501 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-21 18:44:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 230 transitions, 2611 flow [2024-06-21 18:44:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:44:34,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 18:44:34,503 INFO L175 Difference]: Start difference. First operand has 131 places, 199 transitions, 1978 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:44:34,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 230 transitions, 2611 flow [2024-06-21 18:44:34,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 230 transitions, 2453 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:34,625 INFO L231 Difference]: Finished difference. Result has 137 places, 207 transitions, 2105 flow [2024-06-21 18:44:34,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=137, PETRI_TRANSITIONS=207} [2024-06-21 18:44:34,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-21 18:44:34,626 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 207 transitions, 2105 flow [2024-06-21 18:44:34,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:34,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:34,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:44:34,627 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 18:44:34,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009975, now seen corresponding path program 1 times [2024-06-21 18:44:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293043589] [2024-06-21 18:44:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:34,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:35,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293043589] [2024-06-21 18:44:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293043589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932090942] [2024-06-21 18:44:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:36,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:44:36,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 207 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:36,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:36,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:44:36,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:36,834 INFO L124 PetriNetUnfolderBase]: 2621/3885 cut-off events. [2024-06-21 18:44:36,834 INFO L125 PetriNetUnfolderBase]: For 128286/128290 co-relation queries the response was YES. [2024-06-21 18:44:36,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26554 conditions, 3885 events. 2621/3885 cut-off events. For 128286/128290 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18470 event pairs, 762 based on Foata normal form. 7/3888 useless extension candidates. Maximal degree in co-relation 26495. Up to 3690 conditions per place. [2024-06-21 18:44:36,863 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 187 selfloop transitions, 56 changer transitions 0/247 dead transitions. [2024-06-21 18:44:36,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 247 transitions, 3075 flow [2024-06-21 18:44:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 18:44:36,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 18:44:36,865 INFO L175 Difference]: Start difference. First operand has 137 places, 207 transitions, 2105 flow. Second operand 8 states and 158 transitions. [2024-06-21 18:44:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 247 transitions, 3075 flow [2024-06-21 18:44:36,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 247 transitions, 2974 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 18:44:36,956 INFO L231 Difference]: Finished difference. Result has 144 places, 221 transitions, 2351 flow [2024-06-21 18:44:36,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2351, PETRI_PLACES=144, PETRI_TRANSITIONS=221} [2024-06-21 18:44:36,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 18:44:36,957 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 221 transitions, 2351 flow [2024-06-21 18:44:36,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:36,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:36,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:36,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:44:36,958 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 18:44:36,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1600573948, now seen corresponding path program 3 times [2024-06-21 18:44:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:36,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993740342] [2024-06-21 18:44:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:38,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:38,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993740342] [2024-06-21 18:44:38,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993740342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:38,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:38,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561241274] [2024-06-21 18:44:38,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:38,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:38,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:38,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 221 transitions, 2351 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:38,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:38,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:38,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:39,319 INFO L124 PetriNetUnfolderBase]: 2502/3769 cut-off events. [2024-06-21 18:44:39,319 INFO L125 PetriNetUnfolderBase]: For 141165/141185 co-relation queries the response was YES. [2024-06-21 18:44:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27087 conditions, 3769 events. 2502/3769 cut-off events. For 141165/141185 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18372 event pairs, 715 based on Foata normal form. 8/3766 useless extension candidates. Maximal degree in co-relation 27024. Up to 3364 conditions per place. [2024-06-21 18:44:39,348 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 61 changer transitions 0/247 dead transitions. [2024-06-21 18:44:39,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 247 transitions, 2945 flow [2024-06-21 18:44:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:44:39,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:44:39,350 INFO L175 Difference]: Start difference. First operand has 144 places, 221 transitions, 2351 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:44:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 247 transitions, 2945 flow [2024-06-21 18:44:39,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 247 transitions, 2850 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-21 18:44:39,450 INFO L231 Difference]: Finished difference. Result has 150 places, 224 transitions, 2465 flow [2024-06-21 18:44:39,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2465, PETRI_PLACES=150, PETRI_TRANSITIONS=224} [2024-06-21 18:44:39,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 18:44:39,450 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 224 transitions, 2465 flow [2024-06-21 18:44:39,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:39,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:39,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:39,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:44:39,451 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 18:44:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash 312282111, now seen corresponding path program 2 times [2024-06-21 18:44:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483322528] [2024-06-21 18:44:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483322528] [2024-06-21 18:44:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483322528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:40,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882038603] [2024-06-21 18:44:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:40,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:44:40,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 224 transitions, 2465 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:40,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:40,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:44:40,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:41,719 INFO L124 PetriNetUnfolderBase]: 2682/3972 cut-off events. [2024-06-21 18:44:41,720 INFO L125 PetriNetUnfolderBase]: For 154928/154932 co-relation queries the response was YES. [2024-06-21 18:44:41,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29181 conditions, 3972 events. 2682/3972 cut-off events. For 154928/154932 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18875 event pairs, 762 based on Foata normal form. 7/3975 useless extension candidates. Maximal degree in co-relation 29115. Up to 3644 conditions per place. [2024-06-21 18:44:41,751 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 73 changer transitions 0/260 dead transitions. [2024-06-21 18:44:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 260 transitions, 3523 flow [2024-06-21 18:44:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:44:41,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 18:44:41,753 INFO L175 Difference]: Start difference. First operand has 150 places, 224 transitions, 2465 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:44:41,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 260 transitions, 3523 flow [2024-06-21 18:44:41,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 260 transitions, 3340 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:41,918 INFO L231 Difference]: Finished difference. Result has 154 places, 232 transitions, 2604 flow [2024-06-21 18:44:41,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2604, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2024-06-21 18:44:41,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 18:44:41,919 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2604 flow [2024-06-21 18:44:41,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:41,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:41,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:41,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:44:41,920 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 18:44:41,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1600581884, now seen corresponding path program 1 times [2024-06-21 18:44:41,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:41,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012404698] [2024-06-21 18:44:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012404698] [2024-06-21 18:44:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012404698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:43,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535441355] [2024-06-21 18:44:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:43,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:43,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2604 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:43,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:44,634 INFO L124 PetriNetUnfolderBase]: 2583/3881 cut-off events. [2024-06-21 18:44:44,634 INFO L125 PetriNetUnfolderBase]: For 167025/167027 co-relation queries the response was YES. [2024-06-21 18:44:44,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29416 conditions, 3881 events. 2583/3881 cut-off events. For 167025/167027 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18958 event pairs, 744 based on Foata normal form. 5/3883 useless extension candidates. Maximal degree in co-relation 29348. Up to 3579 conditions per place. [2024-06-21 18:44:44,665 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 184 selfloop transitions, 49 changer transitions 0/261 dead transitions. [2024-06-21 18:44:44,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 261 transitions, 3402 flow [2024-06-21 18:44:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:44:44,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 18:44:44,667 INFO L175 Difference]: Start difference. First operand has 154 places, 232 transitions, 2604 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:44:44,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 261 transitions, 3402 flow [2024-06-21 18:44:44,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 261 transitions, 3252 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:44,795 INFO L231 Difference]: Finished difference. Result has 158 places, 236 transitions, 2648 flow [2024-06-21 18:44:44,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2648, PETRI_PLACES=158, PETRI_TRANSITIONS=236} [2024-06-21 18:44:44,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 18:44:44,796 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 236 transitions, 2648 flow [2024-06-21 18:44:44,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:44,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:44,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:44,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:44:44,797 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 18:44:44,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash 312289551, now seen corresponding path program 3 times [2024-06-21 18:44:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:44,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722292668] [2024-06-21 18:44:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:46,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722292668] [2024-06-21 18:44:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722292668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:46,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827954557] [2024-06-21 18:44:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:46,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:44:46,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 236 transitions, 2648 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:46,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:46,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:44:46,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:47,210 INFO L124 PetriNetUnfolderBase]: 2702/4001 cut-off events. [2024-06-21 18:44:47,210 INFO L125 PetriNetUnfolderBase]: For 176380/176384 co-relation queries the response was YES. [2024-06-21 18:44:47,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31106 conditions, 4001 events. 2702/4001 cut-off events. For 176380/176384 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19011 event pairs, 741 based on Foata normal form. 7/4004 useless extension candidates. Maximal degree in co-relation 31036. Up to 3675 conditions per place. [2024-06-21 18:44:47,241 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 177 selfloop transitions, 84 changer transitions 0/265 dead transitions. [2024-06-21 18:44:47,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 265 transitions, 3509 flow [2024-06-21 18:44:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:44:47,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 18:44:47,243 INFO L175 Difference]: Start difference. First operand has 158 places, 236 transitions, 2648 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:44:47,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 265 transitions, 3509 flow [2024-06-21 18:44:47,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 265 transitions, 3359 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 18:44:47,354 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2757 flow [2024-06-21 18:44:47,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2757, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-21 18:44:47,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-21 18:44:47,355 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2757 flow [2024-06-21 18:44:47,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:47,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:47,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:47,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:44:47,356 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 18:44:47,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash 304738600, now seen corresponding path program 2 times [2024-06-21 18:44:47,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:47,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81362160] [2024-06-21 18:44:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:47,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81362160] [2024-06-21 18:44:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81362160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:49,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:49,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:44:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547863917] [2024-06-21 18:44:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:44:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:44:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:44:49,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:49,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2757 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:49,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:49,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:50,102 INFO L124 PetriNetUnfolderBase]: 2611/3923 cut-off events. [2024-06-21 18:44:50,102 INFO L125 PetriNetUnfolderBase]: For 187562/187566 co-relation queries the response was YES. [2024-06-21 18:44:50,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30888 conditions, 3923 events. 2611/3923 cut-off events. For 187562/187566 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19180 event pairs, 747 based on Foata normal form. 7/3926 useless extension candidates. Maximal degree in co-relation 30817. Up to 3444 conditions per place. [2024-06-21 18:44:50,133 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 155 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-21 18:44:50,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 274 transitions, 3753 flow [2024-06-21 18:44:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:44:50,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 18:44:50,134 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2757 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:44:50,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 274 transitions, 3753 flow [2024-06-21 18:44:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 274 transitions, 3568 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:50,237 INFO L231 Difference]: Finished difference. Result has 165 places, 248 transitions, 2945 flow [2024-06-21 18:44:50,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2945, PETRI_PLACES=165, PETRI_TRANSITIONS=248} [2024-06-21 18:44:50,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-21 18:44:50,238 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 248 transitions, 2945 flow [2024-06-21 18:44:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:50,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:50,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:50,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:44:50,238 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 18:44:50,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 341280222, now seen corresponding path program 3 times [2024-06-21 18:44:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:50,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582830693] [2024-06-21 18:44:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:50,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:51,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:51,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582830693] [2024-06-21 18:44:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582830693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:51,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:51,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959746073] [2024-06-21 18:44:51,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:51,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:51,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 248 transitions, 2945 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:51,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:51,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:51,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:52,862 INFO L124 PetriNetUnfolderBase]: 2629/3948 cut-off events. [2024-06-21 18:44:52,863 INFO L125 PetriNetUnfolderBase]: For 200059/200063 co-relation queries the response was YES. [2024-06-21 18:44:52,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 3948 events. 2629/3948 cut-off events. For 200059/200063 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19309 event pairs, 747 based on Foata normal form. 7/3952 useless extension candidates. Maximal degree in co-relation 31860. Up to 3534 conditions per place. [2024-06-21 18:44:52,897 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 168 selfloop transitions, 79 changer transitions 0/276 dead transitions. [2024-06-21 18:44:52,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 276 transitions, 3743 flow [2024-06-21 18:44:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:44:52,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 18:44:52,898 INFO L175 Difference]: Start difference. First operand has 165 places, 248 transitions, 2945 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:44:52,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 276 transitions, 3743 flow [2024-06-21 18:44:52,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 276 transitions, 3512 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 18:44:53,001 INFO L231 Difference]: Finished difference. Result has 168 places, 252 transitions, 2985 flow [2024-06-21 18:44:53,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2985, PETRI_PLACES=168, PETRI_TRANSITIONS=252} [2024-06-21 18:44:53,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 18:44:53,002 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 252 transitions, 2985 flow [2024-06-21 18:44:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:44:53,002 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 18:44:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 304411891, now seen corresponding path program 4 times [2024-06-21 18:44:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084100140] [2024-06-21 18:44:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:54,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084100140] [2024-06-21 18:44:54,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084100140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:54,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:54,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880784631] [2024-06-21 18:44:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:54,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:44:54,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 252 transitions, 2985 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:54,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:44:54,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:55,310 INFO L124 PetriNetUnfolderBase]: 2772/4103 cut-off events. [2024-06-21 18:44:55,310 INFO L125 PetriNetUnfolderBase]: For 212319/212327 co-relation queries the response was YES. [2024-06-21 18:44:55,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33614 conditions, 4103 events. 2772/4103 cut-off events. For 212319/212327 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19645 event pairs, 748 based on Foata normal form. 11/4110 useless extension candidates. Maximal degree in co-relation 33540. Up to 3521 conditions per place. [2024-06-21 18:44:55,343 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 158 selfloop transitions, 128 changer transitions 0/290 dead transitions. [2024-06-21 18:44:55,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 290 transitions, 4171 flow [2024-06-21 18:44:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:44:55,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:44:55,344 INFO L175 Difference]: Start difference. First operand has 168 places, 252 transitions, 2985 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:44:55,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 290 transitions, 4171 flow [2024-06-21 18:44:55,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 290 transitions, 3960 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:55,519 INFO L231 Difference]: Finished difference. Result has 171 places, 264 transitions, 3396 flow [2024-06-21 18:44:55,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3396, PETRI_PLACES=171, PETRI_TRANSITIONS=264} [2024-06-21 18:44:55,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 18:44:55,520 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 264 transitions, 3396 flow [2024-06-21 18:44:55,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:55,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:55,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:55,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:44:55,521 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 18:44:55,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash 295207681, now seen corresponding path program 5 times [2024-06-21 18:44:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:55,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833675404] [2024-06-21 18:44:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:56,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833675404] [2024-06-21 18:44:56,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833675404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:56,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:56,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:56,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680094807] [2024-06-21 18:44:56,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:56,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:56,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:44:56,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 264 transitions, 3396 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:56,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:56,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:44:56,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:57,735 INFO L124 PetriNetUnfolderBase]: 2830/4185 cut-off events. [2024-06-21 18:44:57,736 INFO L125 PetriNetUnfolderBase]: For 231638/231646 co-relation queries the response was YES. [2024-06-21 18:44:57,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4185 events. 2830/4185 cut-off events. For 231638/231646 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20066 event pairs, 750 based on Foata normal form. 11/4192 useless extension candidates. Maximal degree in co-relation 35746. Up to 3578 conditions per place. [2024-06-21 18:44:57,771 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 189 selfloop transitions, 111 changer transitions 0/304 dead transitions. [2024-06-21 18:44:57,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 304 transitions, 4786 flow [2024-06-21 18:44:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 18:44:57,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:44:57,773 INFO L175 Difference]: Start difference. First operand has 171 places, 264 transitions, 3396 flow. Second operand 9 states and 171 transitions. [2024-06-21 18:44:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 304 transitions, 4786 flow [2024-06-21 18:44:57,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 304 transitions, 4623 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:57,946 INFO L231 Difference]: Finished difference. Result has 178 places, 275 transitions, 3733 flow [2024-06-21 18:44:57,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3733, PETRI_PLACES=178, PETRI_TRANSITIONS=275} [2024-06-21 18:44:57,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 18:44:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 275 transitions, 3733 flow [2024-06-21 18:44:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:57,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:57,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:44:57,948 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 18:44:57,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 295207464, now seen corresponding path program 4 times [2024-06-21 18:44:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129015192] [2024-06-21 18:44:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129015192] [2024-06-21 18:44:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129015192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:59,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:44:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853301411] [2024-06-21 18:44:59,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:59,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:44:59,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:44:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:44:59,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:44:59,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 275 transitions, 3733 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:59,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:59,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:44:59,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:00,324 INFO L124 PetriNetUnfolderBase]: 2711/4074 cut-off events. [2024-06-21 18:45:00,324 INFO L125 PetriNetUnfolderBase]: For 239882/239896 co-relation queries the response was YES. [2024-06-21 18:45:00,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35278 conditions, 4074 events. 2711/4074 cut-off events. For 239882/239896 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19931 event pairs, 751 based on Foata normal form. 16/4085 useless extension candidates. Maximal degree in co-relation 35199. Up to 3514 conditions per place. [2024-06-21 18:45:00,358 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 81 changer transitions 0/305 dead transitions. [2024-06-21 18:45:00,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 305 transitions, 4659 flow [2024-06-21 18:45:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:45:00,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:45:00,360 INFO L175 Difference]: Start difference. First operand has 178 places, 275 transitions, 3733 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:45:00,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 305 transitions, 4659 flow [2024-06-21 18:45:00,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 305 transitions, 4393 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:00,503 INFO L231 Difference]: Finished difference. Result has 181 places, 281 transitions, 3819 flow [2024-06-21 18:45:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=181, PETRI_TRANSITIONS=281} [2024-06-21 18:45:00,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 18:45:00,504 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 281 transitions, 3819 flow [2024-06-21 18:45:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:45:00,504 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 18:45:00,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 332083452, now seen corresponding path program 4 times [2024-06-21 18:45:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701129706] [2024-06-21 18:45:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:01,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:01,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701129706] [2024-06-21 18:45:01,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701129706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:01,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522011419] [2024-06-21 18:45:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:02,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:02,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 281 transitions, 3819 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:02,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:02,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:02,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:02,950 INFO L124 PetriNetUnfolderBase]: 2742/4109 cut-off events. [2024-06-21 18:45:02,950 INFO L125 PetriNetUnfolderBase]: For 251673/251677 co-relation queries the response was YES. [2024-06-21 18:45:02,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35466 conditions, 4109 events. 2742/4109 cut-off events. For 251673/251677 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20116 event pairs, 793 based on Foata normal form. 7/4113 useless extension candidates. Maximal degree in co-relation 35386. Up to 3660 conditions per place. [2024-06-21 18:45:02,989 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 207 selfloop transitions, 68 changer transitions 0/310 dead transitions. [2024-06-21 18:45:02,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 310 transitions, 4749 flow [2024-06-21 18:45:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 18:45:02,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 18:45:02,990 INFO L175 Difference]: Start difference. First operand has 181 places, 281 transitions, 3819 flow. Second operand 8 states and 162 transitions. [2024-06-21 18:45:02,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 310 transitions, 4749 flow [2024-06-21 18:45:03,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 310 transitions, 4621 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:03,193 INFO L231 Difference]: Finished difference. Result has 185 places, 285 transitions, 3926 flow [2024-06-21 18:45:03,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=185, PETRI_TRANSITIONS=285} [2024-06-21 18:45:03,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-21 18:45:03,194 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 285 transitions, 3926 flow [2024-06-21 18:45:03,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:03,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:03,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:03,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:45:03,194 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 18:45:03,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash 332083173, now seen corresponding path program 6 times [2024-06-21 18:45:03,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:03,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102863911] [2024-06-21 18:45:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:03,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:04,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102863911] [2024-06-21 18:45:04,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102863911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:04,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:04,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419192702] [2024-06-21 18:45:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:04,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:04,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 285 transitions, 3926 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:04,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:04,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:04,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:05,465 INFO L124 PetriNetUnfolderBase]: 2853/4219 cut-off events. [2024-06-21 18:45:05,465 INFO L125 PetriNetUnfolderBase]: For 262884/262888 co-relation queries the response was YES. [2024-06-21 18:45:05,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 4219 events. 2853/4219 cut-off events. For 262884/262888 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20240 event pairs, 794 based on Foata normal form. 7/4222 useless extension candidates. Maximal degree in co-relation 36783. Up to 3616 conditions per place. [2024-06-21 18:45:05,503 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 196 selfloop transitions, 112 changer transitions 0/312 dead transitions. [2024-06-21 18:45:05,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 312 transitions, 4973 flow [2024-06-21 18:45:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:45:05,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 18:45:05,504 INFO L175 Difference]: Start difference. First operand has 185 places, 285 transitions, 3926 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:45:05,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 312 transitions, 4973 flow [2024-06-21 18:45:05,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 312 transitions, 4776 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:05,843 INFO L231 Difference]: Finished difference. Result has 187 places, 286 transitions, 4017 flow [2024-06-21 18:45:05,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3729, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=187, PETRI_TRANSITIONS=286} [2024-06-21 18:45:05,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-21 18:45:05,844 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 286 transitions, 4017 flow [2024-06-21 18:45:05,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:05,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:05,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:05,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:45:05,844 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 18:45:05,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash -203073212, now seen corresponding path program 5 times [2024-06-21 18:45:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:05,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404600223] [2024-06-21 18:45:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:06,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404600223] [2024-06-21 18:45:06,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404600223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:06,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:06,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180835193] [2024-06-21 18:45:06,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:06,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:06,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:06,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:07,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 286 transitions, 4017 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:07,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:07,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:08,069 INFO L124 PetriNetUnfolderBase]: 2777/4170 cut-off events. [2024-06-21 18:45:08,069 INFO L125 PetriNetUnfolderBase]: For 274541/274551 co-relation queries the response was YES. [2024-06-21 18:45:08,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36929 conditions, 4170 events. 2777/4170 cut-off events. For 274541/274551 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20502 event pairs, 735 based on Foata normal form. 12/4180 useless extension candidates. Maximal degree in co-relation 36846. Up to 3772 conditions per place. [2024-06-21 18:45:08,108 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 235 selfloop transitions, 61 changer transitions 0/336 dead transitions. [2024-06-21 18:45:08,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 336 transitions, 4933 flow [2024-06-21 18:45:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:08,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:08,110 INFO L175 Difference]: Start difference. First operand has 187 places, 286 transitions, 4017 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:08,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 336 transitions, 4933 flow [2024-06-21 18:45:08,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 336 transitions, 4669 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:08,304 INFO L231 Difference]: Finished difference. Result has 192 places, 305 transitions, 4143 flow [2024-06-21 18:45:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4143, PETRI_PLACES=192, PETRI_TRANSITIONS=305} [2024-06-21 18:45:08,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-21 18:45:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 305 transitions, 4143 flow [2024-06-21 18:45:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:08,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:08,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:45:08,306 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 18:45:08,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1511951714, now seen corresponding path program 6 times [2024-06-21 18:45:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725853868] [2024-06-21 18:45:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725853868] [2024-06-21 18:45:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725853868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191040002] [2024-06-21 18:45:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:09,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:09,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 305 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:09,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:09,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:10,407 INFO L124 PetriNetUnfolderBase]: 2846/4279 cut-off events. [2024-06-21 18:45:10,407 INFO L125 PetriNetUnfolderBase]: For 290357/290369 co-relation queries the response was YES. [2024-06-21 18:45:10,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 4279 events. 2846/4279 cut-off events. For 290357/290369 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21184 event pairs, 739 based on Foata normal form. 16/4293 useless extension candidates. Maximal degree in co-relation 37701. Up to 3797 conditions per place. [2024-06-21 18:45:10,448 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 241 selfloop transitions, 81 changer transitions 0/362 dead transitions. [2024-06-21 18:45:10,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 362 transitions, 5313 flow [2024-06-21 18:45:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 18:45:10,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 18:45:10,450 INFO L175 Difference]: Start difference. First operand has 192 places, 305 transitions, 4143 flow. Second operand 9 states and 178 transitions. [2024-06-21 18:45:10,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 362 transitions, 5313 flow [2024-06-21 18:45:10,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 362 transitions, 5073 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:10,748 INFO L231 Difference]: Finished difference. Result has 198 places, 329 transitions, 4558 flow [2024-06-21 18:45:10,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4558, PETRI_PLACES=198, PETRI_TRANSITIONS=329} [2024-06-21 18:45:10,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 18:45:10,749 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 329 transitions, 4558 flow [2024-06-21 18:45:10,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:10,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:10,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:10,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:45:10,750 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 18:45:10,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2103164092, now seen corresponding path program 7 times [2024-06-21 18:45:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:10,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285027979] [2024-06-21 18:45:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:10,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:11,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285027979] [2024-06-21 18:45:11,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285027979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:11,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:11,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457155307] [2024-06-21 18:45:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:11,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:11,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 329 transitions, 4558 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:11,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:11,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:11,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:12,857 INFO L124 PetriNetUnfolderBase]: 2863/4301 cut-off events. [2024-06-21 18:45:12,857 INFO L125 PetriNetUnfolderBase]: For 303071/303079 co-relation queries the response was YES. [2024-06-21 18:45:12,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38693 conditions, 4301 events. 2863/4301 cut-off events. For 303071/303079 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21296 event pairs, 742 based on Foata normal form. 10/4308 useless extension candidates. Maximal degree in co-relation 38606. Up to 3841 conditions per place. [2024-06-21 18:45:12,899 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 242 selfloop transitions, 84 changer transitions 0/366 dead transitions. [2024-06-21 18:45:12,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 5453 flow [2024-06-21 18:45:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:12,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:12,901 INFO L175 Difference]: Start difference. First operand has 198 places, 329 transitions, 4558 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:12,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 5453 flow [2024-06-21 18:45:13,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 366 transitions, 5173 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:13,201 INFO L231 Difference]: Finished difference. Result has 200 places, 335 transitions, 4597 flow [2024-06-21 18:45:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=200, PETRI_TRANSITIONS=335} [2024-06-21 18:45:13,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 18:45:13,202 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 335 transitions, 4597 flow [2024-06-21 18:45:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:13,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:13,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:45:13,202 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 18:45:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2103175469, now seen corresponding path program 7 times [2024-06-21 18:45:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479350567] [2024-06-21 18:45:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:14,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479350567] [2024-06-21 18:45:14,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479350567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:14,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:14,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999587222] [2024-06-21 18:45:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:14,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:14,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 335 transitions, 4597 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:14,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:14,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:14,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:15,410 INFO L124 PetriNetUnfolderBase]: 3076/4550 cut-off events. [2024-06-21 18:45:15,410 INFO L125 PetriNetUnfolderBase]: For 321097/321099 co-relation queries the response was YES. [2024-06-21 18:45:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40942 conditions, 4550 events. 3076/4550 cut-off events. For 321097/321099 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22135 event pairs, 804 based on Foata normal form. 5/4553 useless extension candidates. Maximal degree in co-relation 40856. Up to 4323 conditions per place. [2024-06-21 18:45:15,455 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 313 selfloop transitions, 74 changer transitions 0/391 dead transitions. [2024-06-21 18:45:15,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 6226 flow [2024-06-21 18:45:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:15,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:15,457 INFO L175 Difference]: Start difference. First operand has 200 places, 335 transitions, 4597 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:15,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 6226 flow [2024-06-21 18:45:15,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 391 transitions, 6011 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:15,850 INFO L231 Difference]: Finished difference. Result has 204 places, 357 transitions, 5009 flow [2024-06-21 18:45:15,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5009, PETRI_PLACES=204, PETRI_TRANSITIONS=357} [2024-06-21 18:45:15,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 18:45:15,851 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 357 transitions, 5009 flow [2024-06-21 18:45:15,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:15,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:15,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:45:15,851 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 18:45:15,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 406119454, now seen corresponding path program 8 times [2024-06-21 18:45:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:15,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266762581] [2024-06-21 18:45:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:16,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266762581] [2024-06-21 18:45:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266762581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:16,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:16,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:16,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049300783] [2024-06-21 18:45:16,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:16,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:16,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:16,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 357 transitions, 5009 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:16,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:16,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:16,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:18,166 INFO L124 PetriNetUnfolderBase]: 2999/4496 cut-off events. [2024-06-21 18:45:18,166 INFO L125 PetriNetUnfolderBase]: For 333670/333686 co-relation queries the response was YES. [2024-06-21 18:45:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41008 conditions, 4496 events. 2999/4496 cut-off events. For 333670/333686 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22350 event pairs, 736 based on Foata normal form. 18/4512 useless extension candidates. Maximal degree in co-relation 40920. Up to 4044 conditions per place. [2024-06-21 18:45:18,215 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 285 selfloop transitions, 77 changer transitions 0/408 dead transitions. [2024-06-21 18:45:18,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 408 transitions, 6156 flow [2024-06-21 18:45:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:18,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:18,217 INFO L175 Difference]: Start difference. First operand has 204 places, 357 transitions, 5009 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:18,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 408 transitions, 6156 flow [2024-06-21 18:45:18,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 408 transitions, 5956 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:18,596 INFO L231 Difference]: Finished difference. Result has 210 places, 379 transitions, 5345 flow [2024-06-21 18:45:18,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5345, PETRI_PLACES=210, PETRI_TRANSITIONS=379} [2024-06-21 18:45:18,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 18:45:18,597 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 379 transitions, 5345 flow [2024-06-21 18:45:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:18,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:18,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:18,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:45:18,598 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:18,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash 688687864, now seen corresponding path program 9 times [2024-06-21 18:45:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:18,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563225542] [2024-06-21 18:45:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563225542] [2024-06-21 18:45:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563225542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441249905] [2024-06-21 18:45:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:19,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:19,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 379 transitions, 5345 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:19,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:19,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:21,088 INFO L124 PetriNetUnfolderBase]: 3024/4531 cut-off events. [2024-06-21 18:45:21,088 INFO L125 PetriNetUnfolderBase]: For 348193/348209 co-relation queries the response was YES. [2024-06-21 18:45:21,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41610 conditions, 4531 events. 3024/4531 cut-off events. For 348193/348209 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22523 event pairs, 738 based on Foata normal form. 18/4547 useless extension candidates. Maximal degree in co-relation 41520. Up to 4042 conditions per place. [2024-06-21 18:45:21,130 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 279 selfloop transitions, 92 changer transitions 0/417 dead transitions. [2024-06-21 18:45:21,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 417 transitions, 6360 flow [2024-06-21 18:45:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:45:21,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 18:45:21,132 INFO L175 Difference]: Start difference. First operand has 210 places, 379 transitions, 5345 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:45:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 417 transitions, 6360 flow [2024-06-21 18:45:21,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 417 transitions, 6212 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 18:45:21,494 INFO L231 Difference]: Finished difference. Result has 216 places, 388 transitions, 5581 flow [2024-06-21 18:45:21,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5581, PETRI_PLACES=216, PETRI_TRANSITIONS=388} [2024-06-21 18:45:21,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 18:45:21,495 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 388 transitions, 5581 flow [2024-06-21 18:45:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:21,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:21,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:21,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:45:21,496 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 18:45:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash 406269401, now seen corresponding path program 8 times [2024-06-21 18:45:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:21,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019014401] [2024-06-21 18:45:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019014401] [2024-06-21 18:45:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019014401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:22,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:22,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548848671] [2024-06-21 18:45:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:22,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:22,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:22,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:22,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:22,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 388 transitions, 5581 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:22,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:22,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:22,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:23,763 INFO L124 PetriNetUnfolderBase]: 3264/4815 cut-off events. [2024-06-21 18:45:23,764 INFO L125 PetriNetUnfolderBase]: For 372769/372773 co-relation queries the response was YES. [2024-06-21 18:45:23,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44531 conditions, 4815 events. 3264/4815 cut-off events. For 372769/372773 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 23618 event pairs, 803 based on Foata normal form. 7/4820 useless extension candidates. Maximal degree in co-relation 44440. Up to 4570 conditions per place. [2024-06-21 18:45:23,814 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 86 changer transitions 0/450 dead transitions. [2024-06-21 18:45:23,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 450 transitions, 7489 flow [2024-06-21 18:45:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:23,820 INFO L175 Difference]: Start difference. First operand has 216 places, 388 transitions, 5581 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 450 transitions, 7489 flow [2024-06-21 18:45:24,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 450 transitions, 7223 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:24,178 INFO L231 Difference]: Finished difference. Result has 219 places, 418 transitions, 6140 flow [2024-06-21 18:45:24,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6140, PETRI_PLACES=219, PETRI_TRANSITIONS=418} [2024-06-21 18:45:24,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 18:45:24,179 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 418 transitions, 6140 flow [2024-06-21 18:45:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:24,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:24,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:45:24,180 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 18:45:24,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 411833591, now seen corresponding path program 9 times [2024-06-21 18:45:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323519505] [2024-06-21 18:45:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323519505] [2024-06-21 18:45:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323519505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:25,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:25,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:25,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791351038] [2024-06-21 18:45:25,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:25,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:25,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 418 transitions, 6140 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:25,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:25,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:26,562 INFO L124 PetriNetUnfolderBase]: 3326/4903 cut-off events. [2024-06-21 18:45:26,562 INFO L125 PetriNetUnfolderBase]: For 391459/391463 co-relation queries the response was YES. [2024-06-21 18:45:26,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45756 conditions, 4903 events. 3326/4903 cut-off events. For 391459/391463 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24086 event pairs, 806 based on Foata normal form. 7/4908 useless extension candidates. Maximal degree in co-relation 45663. Up to 4448 conditions per place. [2024-06-21 18:45:26,613 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 336 selfloop transitions, 127 changer transitions 0/467 dead transitions. [2024-06-21 18:45:26,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 467 transitions, 7892 flow [2024-06-21 18:45:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:45:26,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 18:45:26,614 INFO L175 Difference]: Start difference. First operand has 219 places, 418 transitions, 6140 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:45:26,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 467 transitions, 7892 flow [2024-06-21 18:45:27,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 467 transitions, 7728 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 18:45:27,176 INFO L231 Difference]: Finished difference. Result has 226 places, 433 transitions, 6552 flow [2024-06-21 18:45:27,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6552, PETRI_PLACES=226, PETRI_TRANSITIONS=433} [2024-06-21 18:45:27,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 18:45:27,177 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 433 transitions, 6552 flow [2024-06-21 18:45:27,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:27,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:27,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:27,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:45:27,177 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 18:45:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 411833374, now seen corresponding path program 10 times [2024-06-21 18:45:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85091010] [2024-06-21 18:45:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:28,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85091010] [2024-06-21 18:45:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85091010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:28,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879015833] [2024-06-21 18:45:28,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:28,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:28,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:28,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:28,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 433 transitions, 6552 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:28,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:28,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:28,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:29,594 INFO L124 PetriNetUnfolderBase]: 3198/4779 cut-off events. [2024-06-21 18:45:29,595 INFO L125 PetriNetUnfolderBase]: For 405270/405280 co-relation queries the response was YES. [2024-06-21 18:45:29,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45340 conditions, 4779 events. 3198/4779 cut-off events. For 405270/405280 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23960 event pairs, 750 based on Foata normal form. 12/4789 useless extension candidates. Maximal degree in co-relation 45245. Up to 4136 conditions per place. [2024-06-21 18:45:29,645 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 277 selfloop transitions, 130 changer transitions 0/465 dead transitions. [2024-06-21 18:45:29,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 465 transitions, 7495 flow [2024-06-21 18:45:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:29,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:29,646 INFO L175 Difference]: Start difference. First operand has 226 places, 433 transitions, 6552 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:29,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 465 transitions, 7495 flow [2024-06-21 18:45:30,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 465 transitions, 6931 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-06-21 18:45:30,341 INFO L231 Difference]: Finished difference. Result has 226 places, 436 transitions, 6284 flow [2024-06-21 18:45:30,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6284, PETRI_PLACES=226, PETRI_TRANSITIONS=436} [2024-06-21 18:45:30,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 18:45:30,342 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 436 transitions, 6284 flow [2024-06-21 18:45:30,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:30,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:30,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:30,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:45:30,343 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 18:45:30,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash 411841031, now seen corresponding path program 10 times [2024-06-21 18:45:30,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560825098] [2024-06-21 18:45:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:31,505 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 18:45:31,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:31,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560825098] [2024-06-21 18:45:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560825098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:31,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:31,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:31,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512601358] [2024-06-21 18:45:31,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:31,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:31,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:31,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:31,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:31,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:31,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 436 transitions, 6284 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:31,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:31,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:31,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:32,624 INFO L124 PetriNetUnfolderBase]: 3322/4898 cut-off events. [2024-06-21 18:45:32,624 INFO L125 PetriNetUnfolderBase]: For 412991/412995 co-relation queries the response was YES. [2024-06-21 18:45:32,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45740 conditions, 4898 events. 3322/4898 cut-off events. For 412991/412995 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24042 event pairs, 806 based on Foata normal form. 7/4903 useless extension candidates. Maximal degree in co-relation 45646. Up to 4447 conditions per place. [2024-06-21 18:45:32,673 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 318 selfloop transitions, 146 changer transitions 0/468 dead transitions. [2024-06-21 18:45:32,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 468 transitions, 7612 flow [2024-06-21 18:45:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:32,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 18:45:32,674 INFO L175 Difference]: Start difference. First operand has 226 places, 436 transitions, 6284 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:32,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 468 transitions, 7612 flow [2024-06-21 18:45:33,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 468 transitions, 7136 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 18:45:33,156 INFO L231 Difference]: Finished difference. Result has 227 places, 437 transitions, 6124 flow [2024-06-21 18:45:33,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=227, PETRI_TRANSITIONS=437} [2024-06-21 18:45:33,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-21 18:45:33,157 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 437 transitions, 6124 flow [2024-06-21 18:45:33,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:33,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:33,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:33,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:45:33,158 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 18:45:33,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1369346586, now seen corresponding path program 5 times [2024-06-21 18:45:33,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:33,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326421584] [2024-06-21 18:45:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:34,516 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 18:45:34,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326421584] [2024-06-21 18:45:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326421584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139649168] [2024-06-21 18:45:34,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:34,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 437 transitions, 6124 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:35,746 INFO L124 PetriNetUnfolderBase]: 3192/4758 cut-off events. [2024-06-21 18:45:35,747 INFO L125 PetriNetUnfolderBase]: For 425637/425675 co-relation queries the response was YES. [2024-06-21 18:45:35,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44579 conditions, 4758 events. 3192/4758 cut-off events. For 425637/425675 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23873 event pairs, 836 based on Foata normal form. 30/4772 useless extension candidates. Maximal degree in co-relation 44484. Up to 4311 conditions per place. [2024-06-21 18:45:35,800 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 54 changer transitions 0/472 dead transitions. [2024-06-21 18:45:35,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 472 transitions, 7384 flow [2024-06-21 18:45:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:45:35,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:45:35,801 INFO L175 Difference]: Start difference. First operand has 227 places, 437 transitions, 6124 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:45:35,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 472 transitions, 7384 flow [2024-06-21 18:45:36,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 472 transitions, 6991 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:36,377 INFO L231 Difference]: Finished difference. Result has 229 places, 441 transitions, 5885 flow [2024-06-21 18:45:36,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5885, PETRI_PLACES=229, PETRI_TRANSITIONS=441} [2024-06-21 18:45:36,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 18:45:36,377 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 441 transitions, 5885 flow [2024-06-21 18:45:36,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:36,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:36,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:36,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:45:36,378 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:36,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -597578827, now seen corresponding path program 1 times [2024-06-21 18:45:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:36,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837306492] [2024-06-21 18:45:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:36,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:37,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837306492] [2024-06-21 18:45:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837306492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:37,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:45:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844525136] [2024-06-21 18:45:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:45:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:45:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:45:37,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:45:37,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 441 transitions, 5885 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:37,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:37,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:45:37,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:38,752 INFO L124 PetriNetUnfolderBase]: 2907/4463 cut-off events. [2024-06-21 18:45:38,752 INFO L125 PetriNetUnfolderBase]: For 382140/382195 co-relation queries the response was YES. [2024-06-21 18:45:38,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40538 conditions, 4463 events. 2907/4463 cut-off events. For 382140/382195 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23181 event pairs, 798 based on Foata normal form. 35/4475 useless extension candidates. Maximal degree in co-relation 40442. Up to 4008 conditions per place. [2024-06-21 18:45:38,797 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 386 selfloop transitions, 13 changer transitions 0/453 dead transitions. [2024-06-21 18:45:38,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 453 transitions, 6743 flow [2024-06-21 18:45:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:45:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:45:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 18:45:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:45:38,798 INFO L175 Difference]: Start difference. First operand has 229 places, 441 transitions, 5885 flow. Second operand 6 states and 114 transitions. [2024-06-21 18:45:38,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 453 transitions, 6743 flow [2024-06-21 18:45:39,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 453 transitions, 6599 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:39,261 INFO L231 Difference]: Finished difference. Result has 228 places, 444 transitions, 5813 flow [2024-06-21 18:45:39,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5813, PETRI_PLACES=228, PETRI_TRANSITIONS=444} [2024-06-21 18:45:39,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-21 18:45:39,262 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 444 transitions, 5813 flow [2024-06-21 18:45:39,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:39,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:39,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:39,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:45:39,262 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 18:45:39,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash 913673362, now seen corresponding path program 1 times [2024-06-21 18:45:39,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:39,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440557681] [2024-06-21 18:45:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:40,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:40,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440557681] [2024-06-21 18:45:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440557681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:40,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:45:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328557885] [2024-06-21 18:45:40,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:40,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:45:40,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:45:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:45:40,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:40,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 444 transitions, 5813 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:40,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:40,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:40,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:42,064 INFO L124 PetriNetUnfolderBase]: 3198/4783 cut-off events. [2024-06-21 18:45:42,064 INFO L125 PetriNetUnfolderBase]: For 445794/445800 co-relation queries the response was YES. [2024-06-21 18:45:42,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45097 conditions, 4783 events. 3198/4783 cut-off events. For 445794/445800 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24011 event pairs, 751 based on Foata normal form. 5/4782 useless extension candidates. Maximal degree in co-relation 44999. Up to 4184 conditions per place. [2024-06-21 18:45:42,112 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 328 selfloop transitions, 87 changer transitions 0/474 dead transitions. [2024-06-21 18:45:42,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 474 transitions, 6834 flow [2024-06-21 18:45:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:45:42,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:45:42,114 INFO L175 Difference]: Start difference. First operand has 228 places, 444 transitions, 5813 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:45:42,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 474 transitions, 6834 flow [2024-06-21 18:45:42,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 474 transitions, 6786 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:42,776 INFO L231 Difference]: Finished difference. Result has 232 places, 447 transitions, 6050 flow [2024-06-21 18:45:42,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6050, PETRI_PLACES=232, PETRI_TRANSITIONS=447} [2024-06-21 18:45:42,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-21 18:45:42,777 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 447 transitions, 6050 flow [2024-06-21 18:45:42,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:42,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:42,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:42,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:45:42,778 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 18:45:42,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2098945738, now seen corresponding path program 1 times [2024-06-21 18:45:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:42,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305079554] [2024-06-21 18:45:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305079554] [2024-06-21 18:45:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305079554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:44,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:45:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058924271] [2024-06-21 18:45:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:44,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:45:44,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:45:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:45:44,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:44,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 447 transitions, 6050 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:44,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:45,501 INFO L124 PetriNetUnfolderBase]: 3374/4981 cut-off events. [2024-06-21 18:45:45,501 INFO L125 PetriNetUnfolderBase]: For 467576/467584 co-relation queries the response was YES. [2024-06-21 18:45:45,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47613 conditions, 4981 events. 3374/4981 cut-off events. For 467576/467584 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24714 event pairs, 730 based on Foata normal form. 11/4987 useless extension candidates. Maximal degree in co-relation 47514. Up to 4643 conditions per place. [2024-06-21 18:45:45,552 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 399 selfloop transitions, 90 changer transitions 0/493 dead transitions. [2024-06-21 18:45:45,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 493 transitions, 7927 flow [2024-06-21 18:45:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:45:45,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:45:45,553 INFO L175 Difference]: Start difference. First operand has 232 places, 447 transitions, 6050 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:45:45,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 493 transitions, 7927 flow [2024-06-21 18:45:46,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 493 transitions, 7672 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:46,042 INFO L231 Difference]: Finished difference. Result has 235 places, 461 transitions, 6300 flow [2024-06-21 18:45:46,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6300, PETRI_PLACES=235, PETRI_TRANSITIONS=461} [2024-06-21 18:45:46,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 18:45:46,043 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 461 transitions, 6300 flow [2024-06-21 18:45:46,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:46,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:46,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:45:46,043 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 18:45:46,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:46,043 INFO L85 PathProgramCache]: Analyzing trace with hash 918321688, now seen corresponding path program 2 times [2024-06-21 18:45:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:46,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582294114] [2024-06-21 18:45:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582294114] [2024-06-21 18:45:47,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582294114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:47,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:47,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:45:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46214876] [2024-06-21 18:45:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:45:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:45:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:45:47,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:47,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 461 transitions, 6300 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:47,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:47,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:47,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:48,751 INFO L124 PetriNetUnfolderBase]: 3432/5062 cut-off events. [2024-06-21 18:45:48,751 INFO L125 PetriNetUnfolderBase]: For 496003/496011 co-relation queries the response was YES. [2024-06-21 18:45:48,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49641 conditions, 5062 events. 3432/5062 cut-off events. For 496003/496011 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25121 event pairs, 723 based on Foata normal form. 11/5068 useless extension candidates. Maximal degree in co-relation 49540. Up to 4543 conditions per place. [2024-06-21 18:45:48,805 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 376 selfloop transitions, 126 changer transitions 0/506 dead transitions. [2024-06-21 18:45:48,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 506 transitions, 8343 flow [2024-06-21 18:45:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 18:45:48,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 18:45:48,807 INFO L175 Difference]: Start difference. First operand has 235 places, 461 transitions, 6300 flow. Second operand 9 states and 182 transitions. [2024-06-21 18:45:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 506 transitions, 8343 flow [2024-06-21 18:45:49,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 506 transitions, 8155 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:49,338 INFO L231 Difference]: Finished difference. Result has 241 places, 473 transitions, 6742 flow [2024-06-21 18:45:49,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6742, PETRI_PLACES=241, PETRI_TRANSITIONS=473} [2024-06-21 18:45:49,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-21 18:45:49,339 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 473 transitions, 6742 flow [2024-06-21 18:45:49,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:49,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:49,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:49,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:45:49,339 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 18:45:49,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash 918321936, now seen corresponding path program 1 times [2024-06-21 18:45:49,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:49,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333199384] [2024-06-21 18:45:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:51,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:51,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333199384] [2024-06-21 18:45:51,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333199384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:51,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:51,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:45:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484964578] [2024-06-21 18:45:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:45:51,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:45:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:45:51,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 473 transitions, 6742 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:51,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:52,447 INFO L124 PetriNetUnfolderBase]: 3450/5086 cut-off events. [2024-06-21 18:45:52,447 INFO L125 PetriNetUnfolderBase]: For 519974/519978 co-relation queries the response was YES. [2024-06-21 18:45:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51163 conditions, 5086 events. 3450/5086 cut-off events. For 519974/519978 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25287 event pairs, 711 based on Foata normal form. 7/5089 useless extension candidates. Maximal degree in co-relation 51059. Up to 4811 conditions per place. [2024-06-21 18:45:52,502 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 415 selfloop transitions, 88 changer transitions 0/507 dead transitions. [2024-06-21 18:45:52,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 507 transitions, 8384 flow [2024-06-21 18:45:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:45:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:45:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:45:52,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 18:45:52,503 INFO L175 Difference]: Start difference. First operand has 241 places, 473 transitions, 6742 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:45:52,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 507 transitions, 8384 flow [2024-06-21 18:45:53,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 507 transitions, 8155 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:53,127 INFO L231 Difference]: Finished difference. Result has 247 places, 477 transitions, 6818 flow [2024-06-21 18:45:53,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6818, PETRI_PLACES=247, PETRI_TRANSITIONS=477} [2024-06-21 18:45:53,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 18:45:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 477 transitions, 6818 flow [2024-06-21 18:45:53,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:53,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:53,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:53,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:45:53,128 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 18:45:53,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2094304294, now seen corresponding path program 2 times [2024-06-21 18:45:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170300299] [2024-06-21 18:45:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:54,631 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 18:45:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:54,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170300299] [2024-06-21 18:45:54,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170300299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:54,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:54,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:45:54,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745285804] [2024-06-21 18:45:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:45:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:45:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:45:54,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:45:54,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 477 transitions, 6818 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:54,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:54,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:45:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:56,104 INFO L124 PetriNetUnfolderBase]: 3347/4991 cut-off events. [2024-06-21 18:45:56,105 INFO L125 PetriNetUnfolderBase]: For 532463/532469 co-relation queries the response was YES. [2024-06-21 18:45:56,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51136 conditions, 4991 events. 3347/4991 cut-off events. For 532463/532469 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25216 event pairs, 665 based on Foata normal form. 5/4990 useless extension candidates. Maximal degree in co-relation 51030. Up to 4308 conditions per place. [2024-06-21 18:45:56,160 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 339 selfloop transitions, 101 changer transitions 0/507 dead transitions. [2024-06-21 18:45:56,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 507 transitions, 7907 flow [2024-06-21 18:45:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:56,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:45:56,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:45:56,162 INFO L175 Difference]: Start difference. First operand has 247 places, 477 transitions, 6818 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:45:56,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 507 transitions, 7907 flow [2024-06-21 18:45:56,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 507 transitions, 7636 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 18:45:56,917 INFO L231 Difference]: Finished difference. Result has 248 places, 480 transitions, 6873 flow [2024-06-21 18:45:56,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6873, PETRI_PLACES=248, PETRI_TRANSITIONS=480} [2024-06-21 18:45:56,918 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 18:45:56,919 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 480 transitions, 6873 flow [2024-06-21 18:45:56,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:56,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:56,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:45:56,919 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 18:45:56,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1193660410, now seen corresponding path program 3 times [2024-06-21 18:45:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:56,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117386584] [2024-06-21 18:45:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117386584] [2024-06-21 18:45:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117386584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:45:58,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365998072] [2024-06-21 18:45:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:45:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:45:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:45:58,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:45:58,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 480 transitions, 6873 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:58,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:58,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:45:58,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:59,594 INFO L124 PetriNetUnfolderBase]: 3455/5101 cut-off events. [2024-06-21 18:45:59,595 INFO L125 PetriNetUnfolderBase]: For 554228/554236 co-relation queries the response was YES. [2024-06-21 18:45:59,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52356 conditions, 5101 events. 3455/5101 cut-off events. For 554228/554236 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25372 event pairs, 752 based on Foata normal form. 11/5107 useless extension candidates. Maximal degree in co-relation 52249. Up to 4581 conditions per place. [2024-06-21 18:45:59,652 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 392 selfloop transitions, 116 changer transitions 0/512 dead transitions. [2024-06-21 18:45:59,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 512 transitions, 8550 flow [2024-06-21 18:45:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:45:59,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-21 18:45:59,654 INFO L175 Difference]: Start difference. First operand has 248 places, 480 transitions, 6873 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:45:59,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 512 transitions, 8550 flow [2024-06-21 18:46:00,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 512 transitions, 8194 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:00,229 INFO L231 Difference]: Finished difference. Result has 250 places, 480 transitions, 6761 flow [2024-06-21 18:46:00,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6517, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=250, PETRI_TRANSITIONS=480} [2024-06-21 18:46:00,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-21 18:46:00,230 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 480 transitions, 6761 flow [2024-06-21 18:46:00,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:00,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:00,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:46:00,231 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 18:46:00,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1921814218, now seen corresponding path program 4 times [2024-06-21 18:46:00,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088869085] [2024-06-21 18:46:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088869085] [2024-06-21 18:46:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088869085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:01,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261521348] [2024-06-21 18:46:01,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:01,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:01,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:01,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:01,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:01,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:01,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 480 transitions, 6761 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:01,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:01,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:01,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:03,057 INFO L124 PetriNetUnfolderBase]: 3505/5172 cut-off events. [2024-06-21 18:46:03,057 INFO L125 PetriNetUnfolderBase]: For 578000/578008 co-relation queries the response was YES. [2024-06-21 18:46:03,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53594 conditions, 5172 events. 3505/5172 cut-off events. For 578000/578008 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25794 event pairs, 697 based on Foata normal form. 11/5178 useless extension candidates. Maximal degree in co-relation 53486. Up to 4415 conditions per place. [2024-06-21 18:46:03,120 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 374 selfloop transitions, 144 changer transitions 0/522 dead transitions. [2024-06-21 18:46:03,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 522 transitions, 8868 flow [2024-06-21 18:46:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:46:03,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:46:03,121 INFO L175 Difference]: Start difference. First operand has 250 places, 480 transitions, 6761 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:46:03,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 522 transitions, 8868 flow [2024-06-21 18:46:03,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 522 transitions, 8574 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 18:46:03,990 INFO L231 Difference]: Finished difference. Result has 253 places, 488 transitions, 7011 flow [2024-06-21 18:46:03,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6467, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7011, PETRI_PLACES=253, PETRI_TRANSITIONS=488} [2024-06-21 18:46:03,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 18:46:03,990 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 488 transitions, 7011 flow [2024-06-21 18:46:03,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:03,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:03,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:46:03,991 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:03,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1921814404, now seen corresponding path program 3 times [2024-06-21 18:46:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:03,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988875083] [2024-06-21 18:46:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988875083] [2024-06-21 18:46:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988875083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198983365] [2024-06-21 18:46:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:05,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:46:05,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 488 transitions, 7011 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:05,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:05,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:46:05,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:06,992 INFO L124 PetriNetUnfolderBase]: 3405/5077 cut-off events. [2024-06-21 18:46:06,993 INFO L125 PetriNetUnfolderBase]: For 600838/600844 co-relation queries the response was YES. [2024-06-21 18:46:07,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53930 conditions, 5077 events. 3405/5077 cut-off events. For 600838/600844 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25727 event pairs, 666 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 53821. Up to 4324 conditions per place. [2024-06-21 18:46:07,056 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 335 selfloop transitions, 114 changer transitions 0/518 dead transitions. [2024-06-21 18:46:07,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 518 transitions, 8132 flow [2024-06-21 18:46:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 18:46:07,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 18:46:07,058 INFO L175 Difference]: Start difference. First operand has 253 places, 488 transitions, 7011 flow. Second operand 10 states and 191 transitions. [2024-06-21 18:46:07,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 518 transitions, 8132 flow [2024-06-21 18:46:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 518 transitions, 7856 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 18:46:07,865 INFO L231 Difference]: Finished difference. Result has 258 places, 491 transitions, 7096 flow [2024-06-21 18:46:07,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7096, PETRI_PLACES=258, PETRI_TRANSITIONS=491} [2024-06-21 18:46:07,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-21 18:46:07,866 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 491 transitions, 7096 flow [2024-06-21 18:46:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:07,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:07,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:46:07,867 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 18:46:07,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1921807460, now seen corresponding path program 2 times [2024-06-21 18:46:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808504484] [2024-06-21 18:46:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808504484] [2024-06-21 18:46:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808504484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055220892] [2024-06-21 18:46:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:09,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:09,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 491 transitions, 7096 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:09,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:09,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:09,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:10,810 INFO L124 PetriNetUnfolderBase]: 3534/5215 cut-off events. [2024-06-21 18:46:10,810 INFO L125 PetriNetUnfolderBase]: For 625815/625819 co-relation queries the response was YES. [2024-06-21 18:46:10,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55769 conditions, 5215 events. 3534/5215 cut-off events. For 625815/625819 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26066 event pairs, 704 based on Foata normal form. 7/5218 useless extension candidates. Maximal degree in co-relation 55658. Up to 4790 conditions per place. [2024-06-21 18:46:10,873 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 406 selfloop transitions, 115 changer transitions 0/525 dead transitions. [2024-06-21 18:46:10,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 525 transitions, 8834 flow [2024-06-21 18:46:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 18:46:10,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 18:46:10,874 INFO L175 Difference]: Start difference. First operand has 258 places, 491 transitions, 7096 flow. Second operand 9 states and 177 transitions. [2024-06-21 18:46:10,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 525 transitions, 8834 flow [2024-06-21 18:46:11,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 525 transitions, 8499 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 18:46:11,701 INFO L231 Difference]: Finished difference. Result has 259 places, 495 transitions, 7135 flow [2024-06-21 18:46:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6761, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7135, PETRI_PLACES=259, PETRI_TRANSITIONS=495} [2024-06-21 18:46:11,701 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-21 18:46:11,701 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 495 transitions, 7135 flow [2024-06-21 18:46:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:11,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:11,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:46:11,702 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 18:46:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1921807708, now seen corresponding path program 5 times [2024-06-21 18:46:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29407535] [2024-06-21 18:46:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:11,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:13,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:13,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29407535] [2024-06-21 18:46:13,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29407535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:13,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:13,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417399597] [2024-06-21 18:46:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:13,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 495 transitions, 7135 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:13,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:13,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:13,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:14,616 INFO L124 PetriNetUnfolderBase]: 3552/5245 cut-off events. [2024-06-21 18:46:14,617 INFO L125 PetriNetUnfolderBase]: For 644844/644852 co-relation queries the response was YES. [2024-06-21 18:46:14,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56804 conditions, 5245 events. 3552/5245 cut-off events. For 644844/644852 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26259 event pairs, 698 based on Foata normal form. 11/5251 useless extension candidates. Maximal degree in co-relation 56692. Up to 4476 conditions per place. [2024-06-21 18:46:14,675 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 380 selfloop transitions, 148 changer transitions 0/532 dead transitions. [2024-06-21 18:46:14,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 532 transitions, 9089 flow [2024-06-21 18:46:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:46:14,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:46:14,677 INFO L175 Difference]: Start difference. First operand has 259 places, 495 transitions, 7135 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:46:14,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 532 transitions, 9089 flow [2024-06-21 18:46:15,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 532 transitions, 8747 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:15,453 INFO L231 Difference]: Finished difference. Result has 262 places, 499 transitions, 7224 flow [2024-06-21 18:46:15,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7224, PETRI_PLACES=262, PETRI_TRANSITIONS=499} [2024-06-21 18:46:15,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-21 18:46:15,454 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 499 transitions, 7224 flow [2024-06-21 18:46:15,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:15,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:15,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:15,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:46:15,455 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 18:46:15,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1091050836, now seen corresponding path program 3 times [2024-06-21 18:46:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051361203] [2024-06-21 18:46:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:17,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051361203] [2024-06-21 18:46:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051361203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:17,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:17,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:46:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693103937] [2024-06-21 18:46:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:46:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:46:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:46:17,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:17,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 499 transitions, 7224 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:17,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:17,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:17,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:19,015 INFO L124 PetriNetUnfolderBase]: 3594/5301 cut-off events. [2024-06-21 18:46:19,015 INFO L125 PetriNetUnfolderBase]: For 672398/672402 co-relation queries the response was YES. [2024-06-21 18:46:19,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58013 conditions, 5301 events. 3594/5301 cut-off events. For 672398/672402 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26571 event pairs, 705 based on Foata normal form. 7/5304 useless extension candidates. Maximal degree in co-relation 57900. Up to 4788 conditions per place. [2024-06-21 18:46:19,077 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 388 selfloop transitions, 146 changer transitions 0/538 dead transitions. [2024-06-21 18:46:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 538 transitions, 9268 flow [2024-06-21 18:46:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:46:19,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 18:46:19,078 INFO L175 Difference]: Start difference. First operand has 262 places, 499 transitions, 7224 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:46:19,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 538 transitions, 9268 flow [2024-06-21 18:46:19,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 538 transitions, 8902 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:19,827 INFO L231 Difference]: Finished difference. Result has 265 places, 507 transitions, 7440 flow [2024-06-21 18:46:19,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7440, PETRI_PLACES=265, PETRI_TRANSITIONS=507} [2024-06-21 18:46:19,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-21 18:46:19,828 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 507 transitions, 7440 flow [2024-06-21 18:46:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:19,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:19,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:19,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:46:19,829 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 18:46:19,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash -440049400, now seen corresponding path program 6 times [2024-06-21 18:46:19,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:19,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797294829] [2024-06-21 18:46:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:21,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:21,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797294829] [2024-06-21 18:46:21,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797294829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:21,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:21,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453745590] [2024-06-21 18:46:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:21,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:21,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 507 transitions, 7440 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:21,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:21,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:21,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:22,650 INFO L124 PetriNetUnfolderBase]: 3596/5308 cut-off events. [2024-06-21 18:46:22,650 INFO L125 PetriNetUnfolderBase]: For 691111/691119 co-relation queries the response was YES. [2024-06-21 18:46:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58577 conditions, 5308 events. 3596/5308 cut-off events. For 691111/691119 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26593 event pairs, 697 based on Foata normal form. 11/5314 useless extension candidates. Maximal degree in co-relation 58463. Up to 4541 conditions per place. [2024-06-21 18:46:22,719 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 177 changer transitions 0/541 dead transitions. [2024-06-21 18:46:22,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 541 transitions, 9121 flow [2024-06-21 18:46:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:46:22,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:46:22,720 INFO L175 Difference]: Start difference. First operand has 265 places, 507 transitions, 7440 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:46:22,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 541 transitions, 9121 flow [2024-06-21 18:46:23,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 541 transitions, 8798 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 18:46:23,514 INFO L231 Difference]: Finished difference. Result has 269 places, 511 transitions, 7613 flow [2024-06-21 18:46:23,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7613, PETRI_PLACES=269, PETRI_TRANSITIONS=511} [2024-06-21 18:46:23,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 18:46:23,514 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 511 transitions, 7613 flow [2024-06-21 18:46:23,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:23,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:23,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:23,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:46:23,515 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 18:46:23,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1384200070, now seen corresponding path program 4 times [2024-06-21 18:46:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458616045] [2024-06-21 18:46:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458616045] [2024-06-21 18:46:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458616045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:25,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941438029] [2024-06-21 18:46:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:25,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:25,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 511 transitions, 7613 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:25,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:25,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:25,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:26,605 INFO L124 PetriNetUnfolderBase]: 3590/5296 cut-off events. [2024-06-21 18:46:26,606 INFO L125 PetriNetUnfolderBase]: For 705361/705365 co-relation queries the response was YES. [2024-06-21 18:46:26,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59050 conditions, 5296 events. 3590/5296 cut-off events. For 705361/705365 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26482 event pairs, 704 based on Foata normal form. 7/5299 useless extension candidates. Maximal degree in co-relation 58934. Up to 4871 conditions per place. [2024-06-21 18:46:26,676 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 408 selfloop transitions, 128 changer transitions 0/540 dead transitions. [2024-06-21 18:46:26,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 540 transitions, 9161 flow [2024-06-21 18:46:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 18:46:26,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 18:46:26,678 INFO L175 Difference]: Start difference. First operand has 269 places, 511 transitions, 7613 flow. Second operand 9 states and 176 transitions. [2024-06-21 18:46:26,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 540 transitions, 9161 flow [2024-06-21 18:46:27,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 540 transitions, 8725 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:27,455 INFO L231 Difference]: Finished difference. Result has 271 places, 511 transitions, 7443 flow [2024-06-21 18:46:27,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7443, PETRI_PLACES=271, PETRI_TRANSITIONS=511} [2024-06-21 18:46:27,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 18:46:27,456 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 511 transitions, 7443 flow [2024-06-21 18:46:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:27,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:27,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:27,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:46:27,457 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 18:46:27,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1200162598, now seen corresponding path program 1 times [2024-06-21 18:46:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:27,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436165463] [2024-06-21 18:46:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:27,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436165463] [2024-06-21 18:46:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436165463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:46:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844369602] [2024-06-21 18:46:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:46:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:46:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:46:29,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:46:29,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 511 transitions, 7443 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:29,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:29,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:46:29,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:30,847 INFO L124 PetriNetUnfolderBase]: 3468/5179 cut-off events. [2024-06-21 18:46:30,847 INFO L125 PetriNetUnfolderBase]: For 736451/736489 co-relation queries the response was YES. [2024-06-21 18:46:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57917 conditions, 5179 events. 3468/5179 cut-off events. For 736451/736489 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26644 event pairs, 728 based on Foata normal form. 33/5196 useless extension candidates. Maximal degree in co-relation 57800. Up to 4645 conditions per place. [2024-06-21 18:46:31,056 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 431 selfloop transitions, 56 changer transitions 0/544 dead transitions. [2024-06-21 18:46:31,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 544 transitions, 9029 flow [2024-06-21 18:46:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 18:46:31,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 18:46:31,060 INFO L175 Difference]: Start difference. First operand has 271 places, 511 transitions, 7443 flow. Second operand 10 states and 189 transitions. [2024-06-21 18:46:31,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 544 transitions, 9029 flow [2024-06-21 18:46:31,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 544 transitions, 8759 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:31,909 INFO L231 Difference]: Finished difference. Result has 274 places, 514 transitions, 7428 flow [2024-06-21 18:46:31,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7173, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7428, PETRI_PLACES=274, PETRI_TRANSITIONS=514} [2024-06-21 18:46:31,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 18:46:31,910 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 514 transitions, 7428 flow [2024-06-21 18:46:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:31,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:31,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:46:31,910 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:31,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1906075114, now seen corresponding path program 1 times [2024-06-21 18:46:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:31,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737965277] [2024-06-21 18:46:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:33,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737965277] [2024-06-21 18:46:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737965277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:33,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:46:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412055841] [2024-06-21 18:46:33,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:33,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:46:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:46:33,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:46:33,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:46:33,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 514 transitions, 7428 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:33,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:33,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:46:33,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:34,687 INFO L124 PetriNetUnfolderBase]: 3470/5182 cut-off events. [2024-06-21 18:46:34,687 INFO L125 PetriNetUnfolderBase]: For 745440/745478 co-relation queries the response was YES. [2024-06-21 18:46:34,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58160 conditions, 5182 events. 3470/5182 cut-off events. For 745440/745478 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26657 event pairs, 735 based on Foata normal form. 29/5195 useless extension candidates. Maximal degree in co-relation 58042. Up to 4760 conditions per place. [2024-06-21 18:46:34,744 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 443 selfloop transitions, 30 changer transitions 0/530 dead transitions. [2024-06-21 18:46:34,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 530 transitions, 8738 flow [2024-06-21 18:46:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:46:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:46:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 18:46:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 18:46:34,745 INFO L175 Difference]: Start difference. First operand has 274 places, 514 transitions, 7428 flow. Second operand 6 states and 118 transitions. [2024-06-21 18:46:34,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 530 transitions, 8738 flow [2024-06-21 18:46:35,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 530 transitions, 8491 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-21 18:46:35,567 INFO L231 Difference]: Finished difference. Result has 271 places, 517 transitions, 7321 flow [2024-06-21 18:46:35,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7187, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7321, PETRI_PLACES=271, PETRI_TRANSITIONS=517} [2024-06-21 18:46:35,568 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 18:46:35,568 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 517 transitions, 7321 flow [2024-06-21 18:46:35,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:35,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:35,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:46:35,568 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 18:46:35,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:35,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644748, now seen corresponding path program 5 times [2024-06-21 18:46:35,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:35,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719225333] [2024-06-21 18:46:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:37,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719225333] [2024-06-21 18:46:37,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719225333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:37,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:46:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66969250] [2024-06-21 18:46:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:37,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:46:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:46:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:46:37,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:37,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 517 transitions, 7321 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:37,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:37,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:38,902 INFO L124 PetriNetUnfolderBase]: 3638/5371 cut-off events. [2024-06-21 18:46:38,902 INFO L125 PetriNetUnfolderBase]: For 767488/767494 co-relation queries the response was YES. [2024-06-21 18:46:38,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59862 conditions, 5371 events. 3638/5371 cut-off events. For 767488/767494 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27030 event pairs, 691 based on Foata normal form. 9/5376 useless extension candidates. Maximal degree in co-relation 59742. Up to 4624 conditions per place. [2024-06-21 18:46:38,968 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 374 selfloop transitions, 172 changer transitions 0/550 dead transitions. [2024-06-21 18:46:38,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 550 transitions, 9061 flow [2024-06-21 18:46:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:46:38,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 18:46:38,969 INFO L175 Difference]: Start difference. First operand has 271 places, 517 transitions, 7321 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:46:38,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 550 transitions, 9061 flow [2024-06-21 18:46:39,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 550 transitions, 9002 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 18:46:39,605 INFO L231 Difference]: Finished difference. Result has 279 places, 521 transitions, 7773 flow [2024-06-21 18:46:39,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7773, PETRI_PLACES=279, PETRI_TRANSITIONS=521} [2024-06-21 18:46:39,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 18:46:39,606 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 521 transitions, 7773 flow [2024-06-21 18:46:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:39,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:39,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:46:39,606 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 18:46:39,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644500, now seen corresponding path program 7 times [2024-06-21 18:46:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558087913] [2024-06-21 18:46:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:41,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:41,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558087913] [2024-06-21 18:46:41,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558087913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:41,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:41,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:41,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076408525] [2024-06-21 18:46:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:41,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:41,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:41,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 521 transitions, 7773 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:41,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:41,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:41,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:42,567 INFO L124 PetriNetUnfolderBase]: 3712/5482 cut-off events. [2024-06-21 18:46:42,567 INFO L125 PetriNetUnfolderBase]: For 813981/813993 co-relation queries the response was YES. [2024-06-21 18:46:42,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63099 conditions, 5482 events. 3712/5482 cut-off events. For 813981/813993 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27694 event pairs, 679 based on Foata normal form. 15/5492 useless extension candidates. Maximal degree in co-relation 62977. Up to 4088 conditions per place. [2024-06-21 18:46:42,632 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 358 selfloop transitions, 211 changer transitions 0/573 dead transitions. [2024-06-21 18:46:42,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 573 transitions, 10640 flow [2024-06-21 18:46:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:46:42,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:46:42,633 INFO L175 Difference]: Start difference. First operand has 279 places, 521 transitions, 7773 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:46:42,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 573 transitions, 10640 flow [2024-06-21 18:46:43,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 573 transitions, 10180 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:43,593 INFO L231 Difference]: Finished difference. Result has 284 places, 536 transitions, 8293 flow [2024-06-21 18:46:43,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8293, PETRI_PLACES=284, PETRI_TRANSITIONS=536} [2024-06-21 18:46:43,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-21 18:46:43,593 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 536 transitions, 8293 flow [2024-06-21 18:46:43,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:43,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:43,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:43,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:46:43,594 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 18:46:43,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407350, now seen corresponding path program 8 times [2024-06-21 18:46:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062076448] [2024-06-21 18:46:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:45,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:45,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062076448] [2024-06-21 18:46:45,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062076448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:45,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:45,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612947447] [2024-06-21 18:46:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:45,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:45,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 536 transitions, 8293 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:45,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:45,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:45,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:46,714 INFO L124 PetriNetUnfolderBase]: 3730/5508 cut-off events. [2024-06-21 18:46:46,714 INFO L125 PetriNetUnfolderBase]: For 845585/845597 co-relation queries the response was YES. [2024-06-21 18:46:46,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 5508 events. 3730/5508 cut-off events. For 845585/845597 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27851 event pairs, 679 based on Foata normal form. 15/5518 useless extension candidates. Maximal degree in co-relation 64455. Up to 4107 conditions per place. [2024-06-21 18:46:46,784 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 360 selfloop transitions, 213 changer transitions 0/577 dead transitions. [2024-06-21 18:46:46,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 577 transitions, 10873 flow [2024-06-21 18:46:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:46:46,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:46:46,786 INFO L175 Difference]: Start difference. First operand has 284 places, 536 transitions, 8293 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:46:46,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 577 transitions, 10873 flow [2024-06-21 18:46:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 577 transitions, 10527 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-21 18:46:47,769 INFO L231 Difference]: Finished difference. Result has 290 places, 540 transitions, 8554 flow [2024-06-21 18:46:47,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8554, PETRI_PLACES=290, PETRI_TRANSITIONS=540} [2024-06-21 18:46:47,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 18:46:47,770 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 540 transitions, 8554 flow [2024-06-21 18:46:47,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:47,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:47,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:46:47,770 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:47,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653428, now seen corresponding path program 2 times [2024-06-21 18:46:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:47,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575193829] [2024-06-21 18:46:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:49,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:49,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575193829] [2024-06-21 18:46:49,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575193829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:49,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:49,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:49,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567779886] [2024-06-21 18:46:49,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:49,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:49,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:49,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:46:49,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 540 transitions, 8554 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:49,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:49,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:46:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:51,064 INFO L124 PetriNetUnfolderBase]: 3598/5374 cut-off events. [2024-06-21 18:46:51,064 INFO L125 PetriNetUnfolderBase]: For 875840/875880 co-relation queries the response was YES. [2024-06-21 18:46:51,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63787 conditions, 5374 events. 3598/5374 cut-off events. For 875840/875880 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 27903 event pairs, 723 based on Foata normal form. 35/5393 useless extension candidates. Maximal degree in co-relation 63660. Up to 4729 conditions per place. [2024-06-21 18:46:51,140 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 441 selfloop transitions, 74 changer transitions 0/573 dead transitions. [2024-06-21 18:46:51,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 573 transitions, 10244 flow [2024-06-21 18:46:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:46:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:46:51,141 INFO L175 Difference]: Start difference. First operand has 290 places, 540 transitions, 8554 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:46:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 573 transitions, 10244 flow [2024-06-21 18:46:52,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 573 transitions, 9736 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:52,291 INFO L231 Difference]: Finished difference. Result has 292 places, 543 transitions, 8350 flow [2024-06-21 18:46:52,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8350, PETRI_PLACES=292, PETRI_TRANSITIONS=543} [2024-06-21 18:46:52,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-21 18:46:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 543 transitions, 8350 flow [2024-06-21 18:46:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:52,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:52,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:52,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:46:52,293 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 18:46:52,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:52,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653118, now seen corresponding path program 6 times [2024-06-21 18:46:52,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171277732] [2024-06-21 18:46:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:54,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171277732] [2024-06-21 18:46:54,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171277732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:54,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:54,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:46:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311536944] [2024-06-21 18:46:54,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:54,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:46:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:46:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:46:54,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:54,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 543 transitions, 8350 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:54,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:54,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:54,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:55,683 INFO L124 PetriNetUnfolderBase]: 3800/5606 cut-off events. [2024-06-21 18:46:55,683 INFO L125 PetriNetUnfolderBase]: For 897005/897011 co-relation queries the response was YES. [2024-06-21 18:46:55,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66301 conditions, 5606 events. 3800/5606 cut-off events. For 897005/897011 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 28415 event pairs, 692 based on Foata normal form. 9/5611 useless extension candidates. Maximal degree in co-relation 66173. Up to 4817 conditions per place. [2024-06-21 18:46:55,758 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 183 changer transitions 0/582 dead transitions. [2024-06-21 18:46:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 582 transitions, 10634 flow [2024-06-21 18:46:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 18:46:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 18:46:55,759 INFO L175 Difference]: Start difference. First operand has 292 places, 543 transitions, 8350 flow. Second operand 10 states and 189 transitions. [2024-06-21 18:46:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 582 transitions, 10634 flow [2024-06-21 18:46:57,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 582 transitions, 10354 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:57,048 INFO L231 Difference]: Finished difference. Result has 295 places, 551 transitions, 8785 flow [2024-06-21 18:46:57,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8785, PETRI_PLACES=295, PETRI_TRANSITIONS=551} [2024-06-21 18:46:57,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 18:46:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 551 transitions, 8785 flow [2024-06-21 18:46:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:57,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:57,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:57,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:46:57,049 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 18:46:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1704413860, now seen corresponding path program 9 times [2024-06-21 18:46:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837191973] [2024-06-21 18:46:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:58,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837191973] [2024-06-21 18:46:58,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837191973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:58,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:58,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:58,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28727600] [2024-06-21 18:46:58,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:58,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:46:58,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 551 transitions, 8785 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:58,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:58,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:46:58,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:00,205 INFO L124 PetriNetUnfolderBase]: 3794/5604 cut-off events. [2024-06-21 18:47:00,206 INFO L125 PetriNetUnfolderBase]: For 918241/918253 co-relation queries the response was YES. [2024-06-21 18:47:00,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66954 conditions, 5604 events. 3794/5604 cut-off events. For 918241/918253 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 28515 event pairs, 679 based on Foata normal form. 15/5614 useless extension candidates. Maximal degree in co-relation 66825. Up to 4207 conditions per place. [2024-06-21 18:47:00,271 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 370 selfloop transitions, 213 changer transitions 0/587 dead transitions. [2024-06-21 18:47:00,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 587 transitions, 11124 flow [2024-06-21 18:47:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:47:00,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:47:00,273 INFO L175 Difference]: Start difference. First operand has 295 places, 551 transitions, 8785 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:47:00,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 587 transitions, 11124 flow [2024-06-21 18:47:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 587 transitions, 10632 flow, removed 145 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:01,346 INFO L231 Difference]: Finished difference. Result has 299 places, 551 transitions, 8728 flow [2024-06-21 18:47:01,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8293, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8728, PETRI_PLACES=299, PETRI_TRANSITIONS=551} [2024-06-21 18:47:01,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-21 18:47:01,347 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 551 transitions, 8728 flow [2024-06-21 18:47:01,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:01,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:01,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:01,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:47:01,348 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 18:47:01,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407164, now seen corresponding path program 4 times [2024-06-21 18:47:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620513384] [2024-06-21 18:47:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:02,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620513384] [2024-06-21 18:47:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620513384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765958413] [2024-06-21 18:47:02,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:03,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:03,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 551 transitions, 8728 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:03,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:03,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:03,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:04,768 INFO L124 PetriNetUnfolderBase]: 3688/5501 cut-off events. [2024-06-21 18:47:04,768 INFO L125 PetriNetUnfolderBase]: For 936779/936792 co-relation queries the response was YES. [2024-06-21 18:47:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66891 conditions, 5501 events. 3688/5501 cut-off events. For 936779/936792 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28368 event pairs, 679 based on Foata normal form. 9/5504 useless extension candidates. Maximal degree in co-relation 66760. Up to 4473 conditions per place. [2024-06-21 18:47:04,848 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 342 selfloop transitions, 158 changer transitions 0/585 dead transitions. [2024-06-21 18:47:04,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 585 transitions, 10404 flow [2024-06-21 18:47:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:47:04,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 18:47:04,849 INFO L175 Difference]: Start difference. First operand has 299 places, 551 transitions, 8728 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:47:04,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 585 transitions, 10404 flow [2024-06-21 18:47:06,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 585 transitions, 9968 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 18:47:06,054 INFO L231 Difference]: Finished difference. Result has 300 places, 557 transitions, 8914 flow [2024-06-21 18:47:06,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8292, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8914, PETRI_PLACES=300, PETRI_TRANSITIONS=557} [2024-06-21 18:47:06,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 18:47:06,055 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 557 transitions, 8914 flow [2024-06-21 18:47:06,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:06,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:06,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:47:06,055 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 18:47:06,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1704414108, now seen corresponding path program 7 times [2024-06-21 18:47:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:06,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285472058] [2024-06-21 18:47:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:07,964 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 18:47:07,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285472058] [2024-06-21 18:47:07,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285472058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:07,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:07,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:47:07,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871087784] [2024-06-21 18:47:07,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:07,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:47:07,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:47:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:47:08,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:08,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 557 transitions, 8914 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:08,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:08,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:08,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:09,548 INFO L124 PetriNetUnfolderBase]: 3799/5606 cut-off events. [2024-06-21 18:47:09,548 INFO L125 PetriNetUnfolderBase]: For 958936/958942 co-relation queries the response was YES. [2024-06-21 18:47:09,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67837 conditions, 5606 events. 3799/5606 cut-off events. For 958936/958942 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28371 event pairs, 741 based on Foata normal form. 9/5611 useless extension candidates. Maximal degree in co-relation 67705. Up to 4859 conditions per place. [2024-06-21 18:47:09,622 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 171 changer transitions 0/587 dead transitions. [2024-06-21 18:47:09,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 587 transitions, 10766 flow [2024-06-21 18:47:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:47:09,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 18:47:09,623 INFO L175 Difference]: Start difference. First operand has 300 places, 557 transitions, 8914 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:47:09,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 587 transitions, 10766 flow [2024-06-21 18:47:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 587 transitions, 10444 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-21 18:47:11,231 INFO L231 Difference]: Finished difference. Result has 305 places, 557 transitions, 8943 flow [2024-06-21 18:47:11,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8592, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8943, PETRI_PLACES=305, PETRI_TRANSITIONS=557} [2024-06-21 18:47:11,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 18:47:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 557 transitions, 8943 flow [2024-06-21 18:47:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:11,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:47:11,232 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 18:47:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872628, now seen corresponding path program 3 times [2024-06-21 18:47:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774049574] [2024-06-21 18:47:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774049574] [2024-06-21 18:47:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774049574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:12,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222918891] [2024-06-21 18:47:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:12,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:13,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 557 transitions, 8943 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:13,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:13,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:14,623 INFO L124 PetriNetUnfolderBase]: 3667/5478 cut-off events. [2024-06-21 18:47:14,624 INFO L125 PetriNetUnfolderBase]: For 991924/991964 co-relation queries the response was YES. [2024-06-21 18:47:14,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67315 conditions, 5478 events. 3667/5478 cut-off events. For 991924/991964 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28467 event pairs, 778 based on Foata normal form. 35/5497 useless extension candidates. Maximal degree in co-relation 67181. Up to 4743 conditions per place. [2024-06-21 18:47:14,702 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 421 selfloop transitions, 108 changer transitions 0/589 dead transitions. [2024-06-21 18:47:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 589 transitions, 10555 flow [2024-06-21 18:47:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:47:14,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:47:14,703 INFO L175 Difference]: Start difference. First operand has 305 places, 557 transitions, 8943 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:47:14,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 589 transitions, 10555 flow [2024-06-21 18:47:15,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 589 transitions, 10189 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 18:47:15,959 INFO L231 Difference]: Finished difference. Result has 306 places, 560 transitions, 8961 flow [2024-06-21 18:47:15,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8961, PETRI_PLACES=306, PETRI_TRANSITIONS=560} [2024-06-21 18:47:15,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 18:47:15,960 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 560 transitions, 8961 flow [2024-06-21 18:47:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:15,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:15,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:15,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:47:15,961 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 18:47:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1256785136, now seen corresponding path program 8 times [2024-06-21 18:47:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:15,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591406318] [2024-06-21 18:47:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:17,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591406318] [2024-06-21 18:47:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591406318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:17,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:17,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648586722] [2024-06-21 18:47:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:17,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:17,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:17,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:17,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:17,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 560 transitions, 8961 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:17,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:17,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:17,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:19,245 INFO L124 PetriNetUnfolderBase]: 3853/5687 cut-off events. [2024-06-21 18:47:19,246 INFO L125 PetriNetUnfolderBase]: For 1015305/1015311 co-relation queries the response was YES. [2024-06-21 18:47:19,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69975 conditions, 5687 events. 3853/5687 cut-off events. For 1015305/1015311 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 28958 event pairs, 741 based on Foata normal form. 9/5692 useless extension candidates. Maximal degree in co-relation 69840. Up to 4662 conditions per place. [2024-06-21 18:47:19,321 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 327 selfloop transitions, 267 changer transitions 0/598 dead transitions. [2024-06-21 18:47:19,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 598 transitions, 11205 flow [2024-06-21 18:47:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:47:19,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:47:19,323 INFO L175 Difference]: Start difference. First operand has 306 places, 560 transitions, 8961 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:47:19,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 598 transitions, 11205 flow [2024-06-21 18:47:20,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 598 transitions, 10845 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-21 18:47:20,703 INFO L231 Difference]: Finished difference. Result has 307 places, 568 transitions, 9512 flow [2024-06-21 18:47:20,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9512, PETRI_PLACES=307, PETRI_TRANSITIONS=568} [2024-06-21 18:47:20,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 18:47:20,704 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 568 transitions, 9512 flow [2024-06-21 18:47:20,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:20,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:20,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:47:20,704 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 18:47:20,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1989753298, now seen corresponding path program 4 times [2024-06-21 18:47:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950644518] [2024-06-21 18:47:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950644518] [2024-06-21 18:47:22,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950644518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:22,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:22,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:22,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57657011] [2024-06-21 18:47:22,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:22,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:22,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:22,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:22,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 568 transitions, 9512 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:22,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:22,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:22,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:24,002 INFO L124 PetriNetUnfolderBase]: 3721/5559 cut-off events. [2024-06-21 18:47:24,002 INFO L125 PetriNetUnfolderBase]: For 1053804/1053844 co-relation queries the response was YES. [2024-06-21 18:47:24,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69696 conditions, 5559 events. 3721/5559 cut-off events. For 1053804/1053844 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28917 event pairs, 777 based on Foata normal form. 35/5578 useless extension candidates. Maximal degree in co-relation 69560. Up to 4887 conditions per place. [2024-06-21 18:47:24,081 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 85 changer transitions 0/600 dead transitions. [2024-06-21 18:47:24,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 600 transitions, 11160 flow [2024-06-21 18:47:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:47:24,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 18:47:24,082 INFO L175 Difference]: Start difference. First operand has 307 places, 568 transitions, 9512 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:47:24,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 600 transitions, 11160 flow [2024-06-21 18:47:25,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 600 transitions, 10661 flow, removed 105 selfloop flow, removed 5 redundant places. [2024-06-21 18:47:25,395 INFO L231 Difference]: Finished difference. Result has 311 places, 571 transitions, 9361 flow [2024-06-21 18:47:25,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9013, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9361, PETRI_PLACES=311, PETRI_TRANSITIONS=571} [2024-06-21 18:47:25,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 18:47:25,396 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 571 transitions, 9361 flow [2024-06-21 18:47:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:25,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:25,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:47:25,396 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 18:47:25,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2000228818, now seen corresponding path program 5 times [2024-06-21 18:47:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497179553] [2024-06-21 18:47:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497179553] [2024-06-21 18:47:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497179553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:27,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:27,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:27,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632538932] [2024-06-21 18:47:27,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:27,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:27,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:27,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 571 transitions, 9361 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:27,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:27,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:27,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:29,007 INFO L124 PetriNetUnfolderBase]: 3762/5622 cut-off events. [2024-06-21 18:47:29,007 INFO L125 PetriNetUnfolderBase]: For 1087292/1087332 co-relation queries the response was YES. [2024-06-21 18:47:29,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71070 conditions, 5622 events. 3762/5622 cut-off events. For 1087292/1087332 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29392 event pairs, 736 based on Foata normal form. 35/5641 useless extension candidates. Maximal degree in co-relation 70932. Up to 4698 conditions per place. [2024-06-21 18:47:29,090 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 422 selfloop transitions, 125 changer transitions 0/609 dead transitions. [2024-06-21 18:47:29,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 609 transitions, 11511 flow [2024-06-21 18:47:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:47:29,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:47:29,091 INFO L175 Difference]: Start difference. First operand has 311 places, 571 transitions, 9361 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:47:29,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 609 transitions, 11511 flow [2024-06-21 18:47:30,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 609 transitions, 11187 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-21 18:47:30,686 INFO L231 Difference]: Finished difference. Result has 314 places, 577 transitions, 9641 flow [2024-06-21 18:47:30,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9641, PETRI_PLACES=314, PETRI_TRANSITIONS=577} [2024-06-21 18:47:30,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 18:47:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 577 transitions, 9641 flow [2024-06-21 18:47:30,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:30,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:30,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:47:30,687 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 18:47:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1989752988, now seen corresponding path program 9 times [2024-06-21 18:47:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078105641] [2024-06-21 18:47:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078105641] [2024-06-21 18:47:32,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078105641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:32,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:47:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8597969] [2024-06-21 18:47:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:32,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:47:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:32,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:47:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:47:32,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:32,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 577 transitions, 9641 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:32,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:32,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:32,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:34,155 INFO L124 PetriNetUnfolderBase]: 3964/5854 cut-off events. [2024-06-21 18:47:34,155 INFO L125 PetriNetUnfolderBase]: For 1114365/1114371 co-relation queries the response was YES. [2024-06-21 18:47:34,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74344 conditions, 5854 events. 3964/5854 cut-off events. For 1114365/1114371 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29948 event pairs, 749 based on Foata normal form. 9/5859 useless extension candidates. Maximal degree in co-relation 74205. Up to 5078 conditions per place. [2024-06-21 18:47:34,238 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 390 selfloop transitions, 221 changer transitions 0/615 dead transitions. [2024-06-21 18:47:34,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 615 transitions, 11883 flow [2024-06-21 18:47:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 18:47:34,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 18:47:34,239 INFO L175 Difference]: Start difference. First operand has 314 places, 577 transitions, 9641 flow. Second operand 10 states and 188 transitions. [2024-06-21 18:47:34,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 615 transitions, 11883 flow [2024-06-21 18:47:35,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 615 transitions, 11525 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:35,849 INFO L231 Difference]: Finished difference. Result has 318 places, 585 transitions, 10042 flow [2024-06-21 18:47:35,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10042, PETRI_PLACES=318, PETRI_TRANSITIONS=585} [2024-06-21 18:47:35,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 18:47:35,849 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 585 transitions, 10042 flow [2024-06-21 18:47:35,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:35,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:35,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:35,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:47:35,850 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 18:47:35,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744618, now seen corresponding path program 10 times [2024-06-21 18:47:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:35,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199243182] [2024-06-21 18:47:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:35,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199243182] [2024-06-21 18:47:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199243182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:37,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:37,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:47:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680248847] [2024-06-21 18:47:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:47:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:47:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:47:37,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:37,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 585 transitions, 10042 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:37,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:37,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:39,420 INFO L124 PetriNetUnfolderBase]: 3958/5846 cut-off events. [2024-06-21 18:47:39,420 INFO L125 PetriNetUnfolderBase]: For 1122297/1122303 co-relation queries the response was YES. [2024-06-21 18:47:39,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74498 conditions, 5846 events. 3958/5846 cut-off events. For 1122297/1122303 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29921 event pairs, 749 based on Foata normal form. 9/5851 useless extension candidates. Maximal degree in co-relation 74357. Up to 5099 conditions per place. [2024-06-21 18:47:39,498 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 214 changer transitions 0/613 dead transitions. [2024-06-21 18:47:39,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 613 transitions, 11678 flow [2024-06-21 18:47:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:47:39,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 18:47:39,499 INFO L175 Difference]: Start difference. First operand has 318 places, 585 transitions, 10042 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:47:39,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 613 transitions, 11678 flow [2024-06-21 18:47:41,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 613 transitions, 11130 flow, removed 131 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:41,424 INFO L231 Difference]: Finished difference. Result has 322 places, 585 transitions, 9931 flow [2024-06-21 18:47:41,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9494, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9931, PETRI_PLACES=322, PETRI_TRANSITIONS=585} [2024-06-21 18:47:41,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-21 18:47:41,424 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 585 transitions, 9931 flow [2024-06-21 18:47:41,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:41,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:41,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:47:41,425 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 18:47:41,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744370, now seen corresponding path program 10 times [2024-06-21 18:47:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:41,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125644099] [2024-06-21 18:47:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:41,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:43,001 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 18:47:43,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:43,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125644099] [2024-06-21 18:47:43,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125644099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:43,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:43,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502788384] [2024-06-21 18:47:43,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:43,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 585 transitions, 9931 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:44,794 INFO L124 PetriNetUnfolderBase]: 3968/5871 cut-off events. [2024-06-21 18:47:44,795 INFO L125 PetriNetUnfolderBase]: For 1140413/1140419 co-relation queries the response was YES. [2024-06-21 18:47:44,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75138 conditions, 5871 events. 3968/5871 cut-off events. For 1140413/1140419 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 30141 event pairs, 736 based on Foata normal form. 9/5875 useless extension candidates. Maximal degree in co-relation 74995. Up to 4469 conditions per place. [2024-06-21 18:47:44,871 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 327 selfloop transitions, 294 changer transitions 0/625 dead transitions. [2024-06-21 18:47:44,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 625 transitions, 12303 flow [2024-06-21 18:47:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 18:47:44,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:47:44,873 INFO L175 Difference]: Start difference. First operand has 322 places, 585 transitions, 9931 flow. Second operand 10 states and 190 transitions. [2024-06-21 18:47:44,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 625 transitions, 12303 flow [2024-06-21 18:47:46,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 625 transitions, 11864 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:47:46,414 INFO L231 Difference]: Finished difference. Result has 324 places, 594 transitions, 10665 flow [2024-06-21 18:47:46,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9492, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10665, PETRI_PLACES=324, PETRI_TRANSITIONS=594} [2024-06-21 18:47:46,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 18:47:46,415 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 594 transitions, 10665 flow [2024-06-21 18:47:46,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:46,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:46,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:47:46,416 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:46,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1344454752, now seen corresponding path program 2 times [2024-06-21 18:47:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:46,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373983079] [2024-06-21 18:47:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:46,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373983079] [2024-06-21 18:47:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373983079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:47,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:47,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:47:47,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510703108] [2024-06-21 18:47:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:47:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:47:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:47:47,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:47,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 594 transitions, 10665 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:47,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:47,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:47,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:49,469 INFO L124 PetriNetUnfolderBase]: 3804/5683 cut-off events. [2024-06-21 18:47:49,470 INFO L125 PetriNetUnfolderBase]: For 1164893/1164933 co-relation queries the response was YES. [2024-06-21 18:47:49,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74398 conditions, 5683 events. 3804/5683 cut-off events. For 1164893/1164933 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29720 event pairs, 799 based on Foata normal form. 30/5697 useless extension candidates. Maximal degree in co-relation 74253. Up to 5210 conditions per place. [2024-06-21 18:47:49,549 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 508 selfloop transitions, 31 changer transitions 0/603 dead transitions. [2024-06-21 18:47:49,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 603 transitions, 11931 flow [2024-06-21 18:47:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:47:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:47:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 18:47:49,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 18:47:49,550 INFO L175 Difference]: Start difference. First operand has 324 places, 594 transitions, 10665 flow. Second operand 6 states and 112 transitions. [2024-06-21 18:47:49,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 603 transitions, 11931 flow [2024-06-21 18:47:51,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 603 transitions, 11680 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 18:47:51,696 INFO L231 Difference]: Finished difference. Result has 325 places, 594 transitions, 10484 flow [2024-06-21 18:47:51,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10414, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10484, PETRI_PLACES=325, PETRI_TRANSITIONS=594} [2024-06-21 18:47:51,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 18:47:51,697 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 594 transitions, 10484 flow [2024-06-21 18:47:51,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:51,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:51,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:51,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:47:51,697 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:51,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1235773594, now seen corresponding path program 5 times [2024-06-21 18:47:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323776820] [2024-06-21 18:47:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:53,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:53,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323776820] [2024-06-21 18:47:53,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323776820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:53,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:53,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:53,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939190244] [2024-06-21 18:47:53,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:53,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:53,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:53,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:47:53,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 594 transitions, 10484 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:53,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:53,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:47:53,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:54,915 INFO L124 PetriNetUnfolderBase]: 3892/5825 cut-off events. [2024-06-21 18:47:54,915 INFO L125 PetriNetUnfolderBase]: For 1180131/1180139 co-relation queries the response was YES. [2024-06-21 18:47:54,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75759 conditions, 5825 events. 3892/5825 cut-off events. For 1180131/1180139 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30501 event pairs, 709 based on Foata normal form. 10/5833 useless extension candidates. Maximal degree in co-relation 75611. Up to 5113 conditions per place. [2024-06-21 18:47:54,998 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 459 selfloop transitions, 95 changer transitions 0/649 dead transitions. [2024-06-21 18:47:54,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 649 transitions, 12025 flow [2024-06-21 18:47:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:47:54,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:47:54,999 INFO L175 Difference]: Start difference. First operand has 325 places, 594 transitions, 10484 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:47:54,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 649 transitions, 12025 flow [2024-06-21 18:47:57,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 649 transitions, 11953 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 18:47:57,181 INFO L231 Difference]: Finished difference. Result has 333 places, 616 transitions, 10976 flow [2024-06-21 18:47:57,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10412, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10976, PETRI_PLACES=333, PETRI_TRANSITIONS=616} [2024-06-21 18:47:57,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 18:47:57,182 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 616 transitions, 10976 flow [2024-06-21 18:47:57,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:57,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:57,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:47:57,182 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:57,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -383390606, now seen corresponding path program 11 times [2024-06-21 18:47:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130261923] [2024-06-21 18:47:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130261923] [2024-06-21 18:47:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130261923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:58,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090965532] [2024-06-21 18:47:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:58,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:47:58,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 616 transitions, 10976 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:58,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:58,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:47:58,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:00,190 INFO L124 PetriNetUnfolderBase]: 4103/6067 cut-off events. [2024-06-21 18:48:00,190 INFO L125 PetriNetUnfolderBase]: For 1244023/1244027 co-relation queries the response was YES. [2024-06-21 18:48:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79462 conditions, 6067 events. 4103/6067 cut-off events. For 1244023/1244027 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31463 event pairs, 744 based on Foata normal form. 7/6070 useless extension candidates. Maximal degree in co-relation 79311. Up to 5689 conditions per place. [2024-06-21 18:48:00,279 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 558 selfloop transitions, 119 changer transitions 0/681 dead transitions. [2024-06-21 18:48:00,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 681 transitions, 13905 flow [2024-06-21 18:48:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:48:00,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:48:00,280 INFO L175 Difference]: Start difference. First operand has 333 places, 616 transitions, 10976 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:48:00,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 681 transitions, 13905 flow [2024-06-21 18:48:01,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 681 transitions, 13683 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:01,950 INFO L231 Difference]: Finished difference. Result has 341 places, 640 transitions, 11717 flow [2024-06-21 18:48:01,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10754, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11717, PETRI_PLACES=341, PETRI_TRANSITIONS=640} [2024-06-21 18:48:01,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-21 18:48:01,950 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 640 transitions, 11717 flow [2024-06-21 18:48:01,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:01,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:01,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:48:01,951 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:01,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash -374130782, now seen corresponding path program 6 times [2024-06-21 18:48:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:01,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493456856] [2024-06-21 18:48:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:03,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:03,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493456856] [2024-06-21 18:48:03,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493456856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:03,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:03,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730396342] [2024-06-21 18:48:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:03,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:48:03,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 640 transitions, 11717 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:03,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:03,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:48:03,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:05,333 INFO L124 PetriNetUnfolderBase]: 3978/5960 cut-off events. [2024-06-21 18:48:05,333 INFO L125 PetriNetUnfolderBase]: For 1268646/1268656 co-relation queries the response was YES. [2024-06-21 18:48:05,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78871 conditions, 5960 events. 3978/5960 cut-off events. For 1268646/1268656 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31600 event pairs, 687 based on Foata normal form. 12/5970 useless extension candidates. Maximal degree in co-relation 78717. Up to 5183 conditions per place. [2024-06-21 18:48:05,422 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 467 selfloop transitions, 114 changer transitions 0/682 dead transitions. [2024-06-21 18:48:05,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 682 transitions, 13183 flow [2024-06-21 18:48:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:48:05,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:48:05,424 INFO L175 Difference]: Start difference. First operand has 341 places, 640 transitions, 11717 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:48:05,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 682 transitions, 13183 flow [2024-06-21 18:48:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 682 transitions, 12807 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:07,536 INFO L231 Difference]: Finished difference. Result has 346 places, 646 transitions, 11767 flow [2024-06-21 18:48:07,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11767, PETRI_PLACES=346, PETRI_TRANSITIONS=646} [2024-06-21 18:48:07,537 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 18:48:07,537 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 646 transitions, 11767 flow [2024-06-21 18:48:07,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:07,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:48:07,538 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 18:48:07,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash 626118302, now seen corresponding path program 7 times [2024-06-21 18:48:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:07,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710513961] [2024-06-21 18:48:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:07,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:08,802 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 18:48:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710513961] [2024-06-21 18:48:08,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710513961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:08,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:08,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464528834] [2024-06-21 18:48:08,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:08,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:48:08,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 646 transitions, 11767 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:08,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:08,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:48:08,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:10,656 INFO L124 PetriNetUnfolderBase]: 4026/6041 cut-off events. [2024-06-21 18:48:10,656 INFO L125 PetriNetUnfolderBase]: For 1296278/1296288 co-relation queries the response was YES. [2024-06-21 18:48:10,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79590 conditions, 6041 events. 4026/6041 cut-off events. For 1296278/1296288 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32224 event pairs, 705 based on Foata normal form. 12/6051 useless extension candidates. Maximal degree in co-relation 79435. Up to 5284 conditions per place. [2024-06-21 18:48:10,749 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 492 selfloop transitions, 106 changer transitions 0/699 dead transitions. [2024-06-21 18:48:10,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 699 transitions, 13429 flow [2024-06-21 18:48:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:48:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:48:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 18:48:10,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 18:48:10,750 INFO L175 Difference]: Start difference. First operand has 346 places, 646 transitions, 11767 flow. Second operand 9 states and 185 transitions. [2024-06-21 18:48:10,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 699 transitions, 13429 flow [2024-06-21 18:48:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 699 transitions, 13083 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 18:48:13,257 INFO L231 Difference]: Finished difference. Result has 349 places, 665 transitions, 12062 flow [2024-06-21 18:48:13,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11437, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12062, PETRI_PLACES=349, PETRI_TRANSITIONS=665} [2024-06-21 18:48:13,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 18:48:13,257 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 665 transitions, 12062 flow [2024-06-21 18:48:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:13,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:13,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:48:13,258 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 18:48:13,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash 629831792, now seen corresponding path program 8 times [2024-06-21 18:48:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:13,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109012624] [2024-06-21 18:48:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:13,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:14,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109012624] [2024-06-21 18:48:14,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109012624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:14,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:14,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:14,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198987442] [2024-06-21 18:48:14,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:14,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:14,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:48:14,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 665 transitions, 12062 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:48:14,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:16,547 INFO L124 PetriNetUnfolderBase]: 4050/6084 cut-off events. [2024-06-21 18:48:16,547 INFO L125 PetriNetUnfolderBase]: For 1324085/1324095 co-relation queries the response was YES. [2024-06-21 18:48:16,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80234 conditions, 6084 events. 4050/6084 cut-off events. For 1324085/1324095 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32502 event pairs, 744 based on Foata normal form. 12/6094 useless extension candidates. Maximal degree in co-relation 80078. Up to 5274 conditions per place. [2024-06-21 18:48:16,640 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 483 selfloop transitions, 124 changer transitions 0/708 dead transitions. [2024-06-21 18:48:16,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 708 transitions, 13612 flow [2024-06-21 18:48:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:48:16,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:48:16,642 INFO L175 Difference]: Start difference. First operand has 349 places, 665 transitions, 12062 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:48:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 708 transitions, 13612 flow [2024-06-21 18:48:19,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 708 transitions, 13377 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:19,284 INFO L231 Difference]: Finished difference. Result has 356 places, 674 transitions, 12324 flow [2024-06-21 18:48:19,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11827, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12324, PETRI_PLACES=356, PETRI_TRANSITIONS=674} [2024-06-21 18:48:19,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-21 18:48:19,285 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 674 transitions, 12324 flow [2024-06-21 18:48:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:19,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:19,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:48:19,285 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:19,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 629843138, now seen corresponding path program 12 times [2024-06-21 18:48:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:19,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099319678] [2024-06-21 18:48:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:20,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:20,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099319678] [2024-06-21 18:48:20,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099319678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:20,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498884941] [2024-06-21 18:48:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:48:20,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 674 transitions, 12324 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:20,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:20,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:48:20,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:22,407 INFO L124 PetriNetUnfolderBase]: 4310/6381 cut-off events. [2024-06-21 18:48:22,407 INFO L125 PetriNetUnfolderBase]: For 1394718/1394722 co-relation queries the response was YES. [2024-06-21 18:48:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84697 conditions, 6381 events. 4310/6381 cut-off events. For 1394718/1394722 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 33414 event pairs, 824 based on Foata normal form. 7/6384 useless extension candidates. Maximal degree in co-relation 84539. Up to 5961 conditions per place. [2024-06-21 18:48:22,509 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 611 selfloop transitions, 131 changer transitions 0/746 dead transitions. [2024-06-21 18:48:22,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 746 transitions, 15623 flow [2024-06-21 18:48:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:48:22,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:48:22,511 INFO L175 Difference]: Start difference. First operand has 356 places, 674 transitions, 12324 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:48:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 746 transitions, 15623 flow [2024-06-21 18:48:25,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 746 transitions, 15246 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-21 18:48:25,618 INFO L231 Difference]: Finished difference. Result has 359 places, 707 transitions, 13133 flow [2024-06-21 18:48:25,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11947, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13133, PETRI_PLACES=359, PETRI_TRANSITIONS=707} [2024-06-21 18:48:25,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 18:48:25,619 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 707 transitions, 13133 flow [2024-06-21 18:48:25,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:25,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:25,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:48:25,619 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:25,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1391335188, now seen corresponding path program 11 times [2024-06-21 18:48:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569085635] [2024-06-21 18:48:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:27,101 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 18:48:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569085635] [2024-06-21 18:48:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569085635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:27,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:27,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496673587] [2024-06-21 18:48:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:48:27,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 707 transitions, 13133 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:27,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:27,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:48:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:29,388 INFO L124 PetriNetUnfolderBase]: 4342/6438 cut-off events. [2024-06-21 18:48:29,388 INFO L125 PetriNetUnfolderBase]: For 1427921/1427923 co-relation queries the response was YES. [2024-06-21 18:48:29,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85627 conditions, 6438 events. 4342/6438 cut-off events. For 1427921/1427923 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 33884 event pairs, 840 based on Foata normal form. 5/6441 useless extension candidates. Maximal degree in co-relation 85467. Up to 6104 conditions per place. [2024-06-21 18:48:29,484 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 650 selfloop transitions, 99 changer transitions 0/753 dead transitions. [2024-06-21 18:48:29,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 753 transitions, 15647 flow [2024-06-21 18:48:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:48:29,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 18:48:29,485 INFO L175 Difference]: Start difference. First operand has 359 places, 707 transitions, 13133 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:48:29,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 753 transitions, 15647 flow [2024-06-21 18:48:31,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 753 transitions, 15356 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:31,928 INFO L231 Difference]: Finished difference. Result has 365 places, 715 transitions, 13257 flow [2024-06-21 18:48:31,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12842, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13257, PETRI_PLACES=365, PETRI_TRANSITIONS=715} [2024-06-21 18:48:31,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 18:48:31,929 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 715 transitions, 13257 flow [2024-06-21 18:48:31,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:31,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:31,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:48:31,930 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 773935478, now seen corresponding path program 13 times [2024-06-21 18:48:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898995551] [2024-06-21 18:48:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:33,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898995551] [2024-06-21 18:48:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898995551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:33,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:33,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993881764] [2024-06-21 18:48:33,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:33,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:48:33,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 715 transitions, 13257 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:33,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:33,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:48:33,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:35,367 INFO L124 PetriNetUnfolderBase]: 4444/6561 cut-off events. [2024-06-21 18:48:35,367 INFO L125 PetriNetUnfolderBase]: For 1485021/1485023 co-relation queries the response was YES. [2024-06-21 18:48:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88151 conditions, 6561 events. 4444/6561 cut-off events. For 1485021/1485023 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34312 event pairs, 775 based on Foata normal form. 5/6560 useless extension candidates. Maximal degree in co-relation 87990. Up to 5884 conditions per place. [2024-06-21 18:48:35,473 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 574 selfloop transitions, 201 changer transitions 0/779 dead transitions. [2024-06-21 18:48:35,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 779 transitions, 16701 flow [2024-06-21 18:48:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 18:48:35,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 18:48:35,475 INFO L175 Difference]: Start difference. First operand has 365 places, 715 transitions, 13257 flow. Second operand 10 states and 198 transitions. [2024-06-21 18:48:35,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 779 transitions, 16701 flow [2024-06-21 18:48:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 779 transitions, 16388 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-21 18:48:38,707 INFO L231 Difference]: Finished difference. Result has 369 places, 739 transitions, 14262 flow [2024-06-21 18:48:38,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12944, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14262, PETRI_PLACES=369, PETRI_TRANSITIONS=739} [2024-06-21 18:48:38,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 18:48:38,708 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 739 transitions, 14262 flow [2024-06-21 18:48:38,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:38,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:38,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:38,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:48:38,708 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:38,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash 773727902, now seen corresponding path program 9 times [2024-06-21 18:48:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:38,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68024200] [2024-06-21 18:48:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:40,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68024200] [2024-06-21 18:48:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68024200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361185014] [2024-06-21 18:48:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:40,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:48:40,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 739 transitions, 14262 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:40,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:40,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:48:40,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:42,184 INFO L124 PetriNetUnfolderBase]: 4306/6459 cut-off events. [2024-06-21 18:48:42,184 INFO L125 PetriNetUnfolderBase]: For 1517551/1517559 co-relation queries the response was YES. [2024-06-21 18:48:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87891 conditions, 6459 events. 4306/6459 cut-off events. For 1517551/1517559 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34722 event pairs, 744 based on Foata normal form. 10/6467 useless extension candidates. Maximal degree in co-relation 87727. Up to 5479 conditions per place. [2024-06-21 18:48:42,290 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 499 selfloop transitions, 162 changer transitions 0/779 dead transitions. [2024-06-21 18:48:42,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 779 transitions, 15900 flow [2024-06-21 18:48:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:48:42,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:48:42,291 INFO L175 Difference]: Start difference. First operand has 369 places, 739 transitions, 14262 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:48:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 779 transitions, 15900 flow [2024-06-21 18:48:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 779 transitions, 15587 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:46,074 INFO L231 Difference]: Finished difference. Result has 374 places, 745 transitions, 14488 flow [2024-06-21 18:48:46,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13949, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14488, PETRI_PLACES=374, PETRI_TRANSITIONS=745} [2024-06-21 18:48:46,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 18:48:46,075 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 745 transitions, 14488 flow [2024-06-21 18:48:46,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:46,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:46,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:46,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:48:46,075 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:46,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash 773733668, now seen corresponding path program 14 times [2024-06-21 18:48:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:46,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961224357] [2024-06-21 18:48:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:47,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961224357] [2024-06-21 18:48:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961224357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:47,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:47,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052692882] [2024-06-21 18:48:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:47,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:47,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:48:47,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 745 transitions, 14488 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:47,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:47,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:48:47,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:49,410 INFO L124 PetriNetUnfolderBase]: 4456/6586 cut-off events. [2024-06-21 18:48:49,410 INFO L125 PetriNetUnfolderBase]: For 1538376/1538378 co-relation queries the response was YES. [2024-06-21 18:48:49,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89758 conditions, 6586 events. 4456/6586 cut-off events. For 1538376/1538378 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34593 event pairs, 775 based on Foata normal form. 5/6585 useless extension candidates. Maximal degree in co-relation 89592. Up to 5906 conditions per place. [2024-06-21 18:48:49,528 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 601 selfloop transitions, 179 changer transitions 0/784 dead transitions. [2024-06-21 18:48:49,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 784 transitions, 17084 flow [2024-06-21 18:48:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:48:49,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:48:49,530 INFO L175 Difference]: Start difference. First operand has 374 places, 745 transitions, 14488 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:48:49,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 784 transitions, 17084 flow [2024-06-21 18:48:53,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 784 transitions, 16523 flow, removed 123 selfloop flow, removed 8 redundant places. [2024-06-21 18:48:53,245 INFO L231 Difference]: Finished difference. Result has 376 places, 745 transitions, 14302 flow [2024-06-21 18:48:53,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13927, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14302, PETRI_PLACES=376, PETRI_TRANSITIONS=745} [2024-06-21 18:48:53,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-21 18:48:53,246 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 745 transitions, 14302 flow [2024-06-21 18:48:53,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:53,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:53,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:53,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:48:53,246 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:53,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash -295198054, now seen corresponding path program 10 times [2024-06-21 18:48:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:53,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761603107] [2024-06-21 18:48:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:53,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:54,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761603107] [2024-06-21 18:48:54,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761603107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869702684] [2024-06-21 18:48:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:48:54,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 745 transitions, 14302 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:54,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:54,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:48:54,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:57,025 INFO L124 PetriNetUnfolderBase]: 4357/6527 cut-off events. [2024-06-21 18:48:57,025 INFO L125 PetriNetUnfolderBase]: For 1558829/1558837 co-relation queries the response was YES. [2024-06-21 18:48:57,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89150 conditions, 6527 events. 4357/6527 cut-off events. For 1558829/1558837 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35054 event pairs, 709 based on Foata normal form. 10/6535 useless extension candidates. Maximal degree in co-relation 88983. Up to 5625 conditions per place. [2024-06-21 18:48:57,126 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 547 selfloop transitions, 124 changer transitions 0/789 dead transitions. [2024-06-21 18:48:57,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 789 transitions, 16024 flow [2024-06-21 18:48:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:48:57,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:48:57,128 INFO L175 Difference]: Start difference. First operand has 376 places, 745 transitions, 14302 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:48:57,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 789 transitions, 16024 flow [2024-06-21 18:48:59,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 789 transitions, 15603 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 18:48:59,760 INFO L231 Difference]: Finished difference. Result has 379 places, 757 transitions, 14441 flow [2024-06-21 18:48:59,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13881, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14441, PETRI_PLACES=379, PETRI_TRANSITIONS=757} [2024-06-21 18:48:59,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 18:48:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 757 transitions, 14441 flow [2024-06-21 18:48:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:59,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:48:59,762 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:59,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -295197868, now seen corresponding path program 15 times [2024-06-21 18:48:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:59,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309986813] [2024-06-21 18:48:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:00,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309986813] [2024-06-21 18:49:00,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309986813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:00,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:00,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127492261] [2024-06-21 18:49:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:00,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:00,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:00,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:01,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 757 transitions, 14441 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:03,331 INFO L124 PetriNetUnfolderBase]: 4636/6867 cut-off events. [2024-06-21 18:49:03,331 INFO L125 PetriNetUnfolderBase]: For 1650573/1650579 co-relation queries the response was YES. [2024-06-21 18:49:03,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94170 conditions, 6867 events. 4636/6867 cut-off events. For 1650573/1650579 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36493 event pairs, 774 based on Foata normal form. 9/6874 useless extension candidates. Maximal degree in co-relation 94002. Up to 6401 conditions per place. [2024-06-21 18:49:03,441 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 687 selfloop transitions, 144 changer transitions 0/835 dead transitions. [2024-06-21 18:49:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 835 transitions, 18276 flow [2024-06-21 18:49:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:49:03,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:49:03,443 INFO L175 Difference]: Start difference. First operand has 379 places, 757 transitions, 14441 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:49:03,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 835 transitions, 18276 flow [2024-06-21 18:49:07,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 835 transitions, 17885 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-21 18:49:07,347 INFO L231 Difference]: Finished difference. Result has 381 places, 798 transitions, 15597 flow [2024-06-21 18:49:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14050, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15597, PETRI_PLACES=381, PETRI_TRANSITIONS=798} [2024-06-21 18:49:07,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 18:49:07,348 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 798 transitions, 15597 flow [2024-06-21 18:49:07,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:07,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:49:07,349 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:07,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash -290556238, now seen corresponding path program 16 times [2024-06-21 18:49:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:07,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660648961] [2024-06-21 18:49:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:07,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660648961] [2024-06-21 18:49:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660648961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:08,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21039280] [2024-06-21 18:49:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:08,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:08,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 798 transitions, 15597 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:08,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:08,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:08,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:10,925 INFO L124 PetriNetUnfolderBase]: 4782/7072 cut-off events. [2024-06-21 18:49:10,925 INFO L125 PetriNetUnfolderBase]: For 1729364/1729370 co-relation queries the response was YES. [2024-06-21 18:49:11,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98118 conditions, 7072 events. 4782/7072 cut-off events. For 1729364/1729370 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37709 event pairs, 769 based on Foata normal form. 9/7079 useless extension candidates. Maximal degree in co-relation 97948. Up to 6391 conditions per place. [2024-06-21 18:49:11,059 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 682 selfloop transitions, 186 changer transitions 0/872 dead transitions. [2024-06-21 18:49:11,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 872 transitions, 19565 flow [2024-06-21 18:49:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:49:11,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:49:11,060 INFO L175 Difference]: Start difference. First operand has 381 places, 798 transitions, 15597 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:49:11,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 872 transitions, 19565 flow [2024-06-21 18:49:14,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 872 transitions, 19263 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 18:49:14,569 INFO L231 Difference]: Finished difference. Result has 388 places, 831 transitions, 16656 flow [2024-06-21 18:49:14,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15295, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16656, PETRI_PLACES=388, PETRI_TRANSITIONS=831} [2024-06-21 18:49:14,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 18:49:14,570 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 831 transitions, 16656 flow [2024-06-21 18:49:14,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:14,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:14,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:14,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:49:14,570 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:14,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash -290556424, now seen corresponding path program 11 times [2024-06-21 18:49:14,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:14,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733247268] [2024-06-21 18:49:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:15,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733247268] [2024-06-21 18:49:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733247268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:15,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705182381] [2024-06-21 18:49:15,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:15,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:15,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:15,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:16,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:49:16,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 831 transitions, 16656 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:16,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:16,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:49:16,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:18,491 INFO L124 PetriNetUnfolderBase]: 4668/6982 cut-off events. [2024-06-21 18:49:18,492 INFO L125 PetriNetUnfolderBase]: For 1763975/1763983 co-relation queries the response was YES. [2024-06-21 18:49:18,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97731 conditions, 6982 events. 4668/6982 cut-off events. For 1763975/1763983 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37967 event pairs, 718 based on Foata normal form. 10/6990 useless extension candidates. Maximal degree in co-relation 97559. Up to 5936 conditions per place. [2024-06-21 18:49:18,863 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 590 selfloop transitions, 144 changer transitions 0/872 dead transitions. [2024-06-21 18:49:18,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 872 transitions, 18472 flow [2024-06-21 18:49:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:49:18,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:49:18,865 INFO L175 Difference]: Start difference. First operand has 388 places, 831 transitions, 16656 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:49:18,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 872 transitions, 18472 flow [2024-06-21 18:49:22,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 872 transitions, 18106 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-21 18:49:22,305 INFO L231 Difference]: Finished difference. Result has 393 places, 840 transitions, 16844 flow [2024-06-21 18:49:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16290, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16844, PETRI_PLACES=393, PETRI_TRANSITIONS=840} [2024-06-21 18:49:22,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-21 18:49:22,306 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 840 transitions, 16844 flow [2024-06-21 18:49:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:22,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:22,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:49:22,306 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:22,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:22,307 INFO L85 PathProgramCache]: Analyzing trace with hash -290549728, now seen corresponding path program 17 times [2024-06-21 18:49:22,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288858621] [2024-06-21 18:49:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:23,571 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 18:49:23,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:23,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288858621] [2024-06-21 18:49:23,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288858621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:23,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:23,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519125320] [2024-06-21 18:49:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:23,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:23,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:23,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 840 transitions, 16844 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:23,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:23,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:23,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:26,177 INFO L124 PetriNetUnfolderBase]: 4801/7110 cut-off events. [2024-06-21 18:49:26,177 INFO L125 PetriNetUnfolderBase]: For 1788829/1788835 co-relation queries the response was YES. [2024-06-21 18:49:26,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99269 conditions, 7110 events. 4801/7110 cut-off events. For 1788829/1788835 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38095 event pairs, 769 based on Foata normal form. 9/7117 useless extension candidates. Maximal degree in co-relation 99095. Up to 6423 conditions per place. [2024-06-21 18:49:26,296 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 671 selfloop transitions, 204 changer transitions 0/879 dead transitions. [2024-06-21 18:49:26,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 879 transitions, 19608 flow [2024-06-21 18:49:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:49:26,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 18:49:26,298 INFO L175 Difference]: Start difference. First operand has 393 places, 840 transitions, 16844 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:49:26,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 879 transitions, 19608 flow [2024-06-21 18:49:30,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 879 transitions, 19172 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:30,437 INFO L231 Difference]: Finished difference. Result has 395 places, 843 transitions, 16971 flow [2024-06-21 18:49:30,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16408, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16971, PETRI_PLACES=395, PETRI_TRANSITIONS=843} [2024-06-21 18:49:30,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-21 18:49:30,438 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 843 transitions, 16971 flow [2024-06-21 18:49:30,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:30,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:30,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:30,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:49:30,438 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:30,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:30,438 INFO L85 PathProgramCache]: Analyzing trace with hash 327200592, now seen corresponding path program 12 times [2024-06-21 18:49:30,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:30,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361573957] [2024-06-21 18:49:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:30,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:32,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361573957] [2024-06-21 18:49:32,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361573957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:32,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:32,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319073311] [2024-06-21 18:49:32,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:32,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:32,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:32,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:32,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 843 transitions, 16971 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:32,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:32,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:32,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:34,575 INFO L124 PetriNetUnfolderBase]: 4847/7181 cut-off events. [2024-06-21 18:49:34,575 INFO L125 PetriNetUnfolderBase]: For 1828661/1828665 co-relation queries the response was YES. [2024-06-21 18:49:34,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100385 conditions, 7181 events. 4847/7181 cut-off events. For 1828661/1828665 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38594 event pairs, 825 based on Foata normal form. 7/7186 useless extension candidates. Maximal degree in co-relation 100210. Up to 6816 conditions per place. [2024-06-21 18:49:34,696 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 787 selfloop transitions, 100 changer transitions 0/891 dead transitions. [2024-06-21 18:49:34,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 891 transitions, 19879 flow [2024-06-21 18:49:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:49:34,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 18:49:34,697 INFO L175 Difference]: Start difference. First operand has 395 places, 843 transitions, 16971 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:49:34,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 891 transitions, 19879 flow [2024-06-21 18:49:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 891 transitions, 19434 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:39,424 INFO L231 Difference]: Finished difference. Result has 399 places, 855 transitions, 17011 flow [2024-06-21 18:49:39,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16526, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17011, PETRI_PLACES=399, PETRI_TRANSITIONS=855} [2024-06-21 18:49:39,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 18:49:39,425 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 855 transitions, 17011 flow [2024-06-21 18:49:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:39,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:39,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:39,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:49:39,426 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:39,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash -118066534, now seen corresponding path program 12 times [2024-06-21 18:49:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677331026] [2024-06-21 18:49:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677331026] [2024-06-21 18:49:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677331026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059079378] [2024-06-21 18:49:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:41,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:41,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:49:41,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 855 transitions, 17011 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:41,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:41,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:49:41,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:44,063 INFO L124 PetriNetUnfolderBase]: 4720/7054 cut-off events. [2024-06-21 18:49:44,064 INFO L125 PetriNetUnfolderBase]: For 1837671/1837677 co-relation queries the response was YES. [2024-06-21 18:49:44,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98593 conditions, 7054 events. 4720/7054 cut-off events. For 1837671/1837677 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38312 event pairs, 724 based on Foata normal form. 8/7060 useless extension candidates. Maximal degree in co-relation 98417. Up to 5791 conditions per place. [2024-06-21 18:49:44,172 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 535 selfloop transitions, 214 changer transitions 0/890 dead transitions. [2024-06-21 18:49:44,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 890 transitions, 18647 flow [2024-06-21 18:49:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 18:49:44,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 18:49:44,174 INFO L175 Difference]: Start difference. First operand has 399 places, 855 transitions, 17011 flow. Second operand 10 states and 195 transitions. [2024-06-21 18:49:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 890 transitions, 18647 flow [2024-06-21 18:49:48,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 890 transitions, 18317 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:48,657 INFO L231 Difference]: Finished difference. Result has 403 places, 858 transitions, 17145 flow [2024-06-21 18:49:48,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16681, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17145, PETRI_PLACES=403, PETRI_TRANSITIONS=858} [2024-06-21 18:49:48,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 18:49:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 858 transitions, 17145 flow [2024-06-21 18:49:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:48,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:48,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:49:48,658 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:48,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash -118066348, now seen corresponding path program 18 times [2024-06-21 18:49:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453433051] [2024-06-21 18:49:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:50,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453433051] [2024-06-21 18:49:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453433051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108795917] [2024-06-21 18:49:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:50,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:50,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:50,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:50,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 858 transitions, 17145 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:50,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:50,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:50,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:53,018 INFO L124 PetriNetUnfolderBase]: 4925/7296 cut-off events. [2024-06-21 18:49:53,018 INFO L125 PetriNetUnfolderBase]: For 1897972/1897978 co-relation queries the response was YES. [2024-06-21 18:49:53,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101722 conditions, 7296 events. 4925/7296 cut-off events. For 1897972/1897978 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39238 event pairs, 780 based on Foata normal form. 9/7303 useless extension candidates. Maximal degree in co-relation 101545. Up to 6051 conditions per place. [2024-06-21 18:49:53,136 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 622 selfloop transitions, 290 changer transitions 0/916 dead transitions. [2024-06-21 18:49:53,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 916 transitions, 20701 flow [2024-06-21 18:49:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:49:53,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:49:53,137 INFO L175 Difference]: Start difference. First operand has 403 places, 858 transitions, 17145 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:49:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 916 transitions, 20701 flow [2024-06-21 18:49:56,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 916 transitions, 19977 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-21 18:49:56,786 INFO L231 Difference]: Finished difference. Result has 405 places, 876 transitions, 17493 flow [2024-06-21 18:49:56,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16421, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17493, PETRI_PLACES=405, PETRI_TRANSITIONS=876} [2024-06-21 18:49:56,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 18:49:56,787 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 876 transitions, 17493 flow [2024-06-21 18:49:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:56,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:56,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:56,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:49:56,788 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:56,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash -118059590, now seen corresponding path program 13 times [2024-06-21 18:49:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034162570] [2024-06-21 18:49:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:56,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:58,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:58,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034162570] [2024-06-21 18:49:58,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034162570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:58,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:58,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:49:58,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105164329] [2024-06-21 18:49:58,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:49:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:49:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:49:58,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:49:58,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 876 transitions, 17493 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:58,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:58,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:49:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:01,271 INFO L124 PetriNetUnfolderBase]: 4957/7339 cut-off events. [2024-06-21 18:50:01,271 INFO L125 PetriNetUnfolderBase]: For 1939723/1939727 co-relation queries the response was YES. [2024-06-21 18:50:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103092 conditions, 7339 events. 4957/7339 cut-off events. For 1939723/1939727 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39526 event pairs, 808 based on Foata normal form. 7/7344 useless extension candidates. Maximal degree in co-relation 102913. Up to 6777 conditions per place. [2024-06-21 18:50:01,391 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 779 selfloop transitions, 137 changer transitions 0/920 dead transitions. [2024-06-21 18:50:01,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 920 transitions, 20447 flow [2024-06-21 18:50:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:50:01,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 18:50:01,393 INFO L175 Difference]: Start difference. First operand has 405 places, 876 transitions, 17493 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:50:01,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 920 transitions, 20447 flow [2024-06-21 18:50:05,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 920 transitions, 19082 flow, removed 149 selfloop flow, removed 10 redundant places. [2024-06-21 18:50:05,137 INFO L231 Difference]: Finished difference. Result has 405 places, 884 transitions, 16634 flow [2024-06-21 18:50:05,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16634, PETRI_PLACES=405, PETRI_TRANSITIONS=884} [2024-06-21 18:50:05,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 18:50:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 884 transitions, 16634 flow [2024-06-21 18:50:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:05,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:05,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:50:05,139 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:05,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -118059838, now seen corresponding path program 19 times [2024-06-21 18:50:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:05,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045513945] [2024-06-21 18:50:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:06,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045513945] [2024-06-21 18:50:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045513945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205820733] [2024-06-21 18:50:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:06,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:06,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:50:06,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 884 transitions, 16634 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:06,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:06,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:50:06,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:09,618 INFO L124 PetriNetUnfolderBase]: 4975/7368 cut-off events. [2024-06-21 18:50:09,619 INFO L125 PetriNetUnfolderBase]: For 1952237/1952243 co-relation queries the response was YES. [2024-06-21 18:50:09,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101011 conditions, 7368 events. 4975/7368 cut-off events. For 1952237/1952243 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39696 event pairs, 780 based on Foata normal form. 9/7375 useless extension candidates. Maximal degree in co-relation 100833. Up to 6116 conditions per place. [2024-06-21 18:50:09,906 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 628 selfloop transitions, 295 changer transitions 0/927 dead transitions. [2024-06-21 18:50:09,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 927 transitions, 19819 flow [2024-06-21 18:50:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:50:09,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 18:50:09,907 INFO L175 Difference]: Start difference. First operand has 405 places, 884 transitions, 16634 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:50:09,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 927 transitions, 19819 flow [2024-06-21 18:50:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 927 transitions, 19395 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-21 18:50:13,457 INFO L231 Difference]: Finished difference. Result has 406 places, 889 transitions, 17027 flow [2024-06-21 18:50:13,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16210, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17027, PETRI_PLACES=406, PETRI_TRANSITIONS=889} [2024-06-21 18:50:13,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-21 18:50:13,458 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 889 transitions, 17027 flow [2024-06-21 18:50:13,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:13,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:13,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:50:13,459 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:13,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -117828950, now seen corresponding path program 14 times [2024-06-21 18:50:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418470834] [2024-06-21 18:50:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418470834] [2024-06-21 18:50:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418470834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:14,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145466472] [2024-06-21 18:50:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:14,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:14,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:50:15,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 889 transitions, 17027 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:50:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:17,995 INFO L124 PetriNetUnfolderBase]: 5007/7411 cut-off events. [2024-06-21 18:50:17,995 INFO L125 PetriNetUnfolderBase]: For 1996655/1996659 co-relation queries the response was YES. [2024-06-21 18:50:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102377 conditions, 7411 events. 5007/7411 cut-off events. For 1996655/1996659 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39888 event pairs, 808 based on Foata normal form. 7/7416 useless extension candidates. Maximal degree in co-relation 102198. Up to 6849 conditions per place. [2024-06-21 18:50:18,136 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 772 selfloop transitions, 156 changer transitions 0/932 dead transitions. [2024-06-21 18:50:18,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 932 transitions, 19825 flow [2024-06-21 18:50:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 18:50:18,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 18:50:18,138 INFO L175 Difference]: Start difference. First operand has 406 places, 889 transitions, 17027 flow. Second operand 10 states and 192 transitions. [2024-06-21 18:50:18,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 932 transitions, 19825 flow [2024-06-21 18:50:21,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 932 transitions, 19121 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:21,710 INFO L231 Difference]: Finished difference. Result has 409 places, 897 transitions, 16875 flow [2024-06-21 18:50:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16323, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16875, PETRI_PLACES=409, PETRI_TRANSITIONS=897} [2024-06-21 18:50:21,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-21 18:50:21,711 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 897 transitions, 16875 flow [2024-06-21 18:50:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:21,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:21,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:50:21,711 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -117820270, now seen corresponding path program 6 times [2024-06-21 18:50:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279771555] [2024-06-21 18:50:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279771555] [2024-06-21 18:50:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279771555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918756801] [2024-06-21 18:50:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:23,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:50:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 897 transitions, 16875 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:23,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:23,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:50:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:26,361 INFO L124 PetriNetUnfolderBase]: 4824/7216 cut-off events. [2024-06-21 18:50:26,361 INFO L125 PetriNetUnfolderBase]: For 2031461/2031495 co-relation queries the response was YES. [2024-06-21 18:50:26,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99242 conditions, 7216 events. 4824/7216 cut-off events. For 2031461/2031495 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39782 event pairs, 911 based on Foata normal form. 29/7225 useless extension candidates. Maximal degree in co-relation 99062. Up to 6489 conditions per place. [2024-06-21 18:50:26,492 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 799 selfloop transitions, 63 changer transitions 0/935 dead transitions. [2024-06-21 18:50:26,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 935 transitions, 19151 flow [2024-06-21 18:50:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:50:26,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:50:26,493 INFO L175 Difference]: Start difference. First operand has 409 places, 897 transitions, 16875 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:50:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 935 transitions, 19151 flow [2024-06-21 18:50:31,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 935 transitions, 18611 flow, removed 119 selfloop flow, removed 8 redundant places. [2024-06-21 18:50:31,255 INFO L231 Difference]: Finished difference. Result has 411 places, 900 transitions, 16497 flow [2024-06-21 18:50:31,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16335, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16497, PETRI_PLACES=411, PETRI_TRANSITIONS=900} [2024-06-21 18:50:31,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-21 18:50:31,256 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 900 transitions, 16497 flow [2024-06-21 18:50:31,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:31,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:31,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:50:31,257 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:31,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash -117829198, now seen corresponding path program 20 times [2024-06-21 18:50:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:31,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712691288] [2024-06-21 18:50:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:31,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:32,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712691288] [2024-06-21 18:50:32,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712691288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:32,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:32,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:50:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642609558] [2024-06-21 18:50:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:32,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:50:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:50:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:50:32,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:50:32,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 900 transitions, 16497 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:32,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:32,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:50:32,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:35,363 INFO L124 PetriNetUnfolderBase]: 5013/7427 cut-off events. [2024-06-21 18:50:35,363 INFO L125 PetriNetUnfolderBase]: For 2009980/2009986 co-relation queries the response was YES. [2024-06-21 18:50:35,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100491 conditions, 7427 events. 5013/7427 cut-off events. For 2009980/2009986 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40043 event pairs, 777 based on Foata normal form. 9/7434 useless extension candidates. Maximal degree in co-relation 100310. Up to 6178 conditions per place. [2024-06-21 18:50:35,690 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 569 selfloop transitions, 363 changer transitions 0/936 dead transitions. [2024-06-21 18:50:35,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 936 transitions, 19113 flow [2024-06-21 18:50:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:50:35,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 18:50:35,692 INFO L175 Difference]: Start difference. First operand has 411 places, 900 transitions, 16497 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:50:35,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 936 transitions, 19113 flow [2024-06-21 18:50:39,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 936 transitions, 18869 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-21 18:50:39,342 INFO L231 Difference]: Finished difference. Result has 412 places, 901 transitions, 17003 flow [2024-06-21 18:50:39,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16253, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17003, PETRI_PLACES=412, PETRI_TRANSITIONS=901} [2024-06-21 18:50:39,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-21 18:50:39,342 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 901 transitions, 17003 flow [2024-06-21 18:50:39,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:39,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:39,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:39,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:50:39,343 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:39,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -117820580, now seen corresponding path program 15 times [2024-06-21 18:50:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964556302] [2024-06-21 18:50:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964556302] [2024-06-21 18:50:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964556302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:41,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:41,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131041125] [2024-06-21 18:50:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 18:50:41,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 901 transitions, 17003 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:41,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:41,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 18:50:41,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:44,235 INFO L124 PetriNetUnfolderBase]: 5021/7435 cut-off events. [2024-06-21 18:50:44,235 INFO L125 PetriNetUnfolderBase]: For 2033713/2033717 co-relation queries the response was YES. [2024-06-21 18:50:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101535 conditions, 7435 events. 5021/7435 cut-off events. For 2033713/2033717 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40159 event pairs, 805 based on Foata normal form. 7/7440 useless extension candidates. Maximal degree in co-relation 101353. Up to 6754 conditions per place. [2024-06-21 18:50:44,362 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 740 selfloop transitions, 200 changer transitions 0/944 dead transitions. [2024-06-21 18:50:44,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 944 transitions, 19677 flow [2024-06-21 18:50:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:50:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:50:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 18:50:44,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 18:50:44,363 INFO L175 Difference]: Start difference. First operand has 412 places, 901 transitions, 17003 flow. Second operand 11 states and 210 transitions. [2024-06-21 18:50:44,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 944 transitions, 19677 flow [2024-06-21 18:50:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 944 transitions, 18708 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-21 18:50:49,438 INFO L231 Difference]: Finished difference. Result has 414 places, 905 transitions, 16494 flow [2024-06-21 18:50:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16034, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16494, PETRI_PLACES=414, PETRI_TRANSITIONS=905} [2024-06-21 18:50:49,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-21 18:50:49,439 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 905 transitions, 16494 flow [2024-06-21 18:50:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:49,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:50:49,440 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:49,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash -563758964, now seen corresponding path program 3 times [2024-06-21 18:50:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824941716] [2024-06-21 18:50:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:49,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824941716] [2024-06-21 18:50:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824941716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:50,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:50,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:50,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234490547] [2024-06-21 18:50:50,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:50,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 18:50:50,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 905 transitions, 16494 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:50,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:50,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 18:50:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:53,021 INFO L124 PetriNetUnfolderBase]: 4823/7216 cut-off events. [2024-06-21 18:50:53,022 INFO L125 PetriNetUnfolderBase]: For 2069747/2069781 co-relation queries the response was YES. [2024-06-21 18:50:53,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98698 conditions, 7216 events. 4823/7216 cut-off events. For 2069747/2069781 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39743 event pairs, 909 based on Foata normal form. 24/7220 useless extension candidates. Maximal degree in co-relation 98516. Up to 6609 conditions per place. [2024-06-21 18:50:53,346 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 817 selfloop transitions, 31 changer transitions 0/922 dead transitions. [2024-06-21 18:50:53,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 922 transitions, 18248 flow [2024-06-21 18:50:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:50:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:50:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 18:50:53,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 18:50:53,347 INFO L175 Difference]: Start difference. First operand has 414 places, 905 transitions, 16494 flow. Second operand 7 states and 133 transitions. [2024-06-21 18:50:53,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 922 transitions, 18248 flow [2024-06-21 18:50:56,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 922 transitions, 17345 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-06-21 18:50:56,225 INFO L231 Difference]: Finished difference. Result has 409 places, 905 transitions, 15663 flow [2024-06-21 18:50:56,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15591, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15663, PETRI_PLACES=409, PETRI_TRANSITIONS=905} [2024-06-21 18:50:56,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-21 18:50:56,225 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 905 transitions, 15663 flow [2024-06-21 18:50:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:56,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:56,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:56,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:50:56,226 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:56,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1919208140, now seen corresponding path program 1 times [2024-06-21 18:50:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:56,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199286222] [2024-06-21 18:50:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:57,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:57,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199286222] [2024-06-21 18:50:57,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199286222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:57,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:57,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:50:57,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318323625] [2024-06-21 18:50:57,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:57,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:50:57,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:50:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:50:57,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 18:50:57,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 905 transitions, 15663 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:57,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:57,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 18:50:57,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:59,602 INFO L124 PetriNetUnfolderBase]: 4546/6928 cut-off events. [2024-06-21 18:50:59,602 INFO L125 PetriNetUnfolderBase]: For 1871218/1871269 co-relation queries the response was YES. [2024-06-21 18:50:59,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89862 conditions, 6928 events. 4546/6928 cut-off events. For 1871218/1871269 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39084 event pairs, 996 based on Foata normal form. 31/6934 useless extension candidates. Maximal degree in co-relation 89681. Up to 6211 conditions per place. [2024-06-21 18:50:59,710 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 824 selfloop transitions, 21 changer transitions 0/920 dead transitions. [2024-06-21 18:50:59,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 920 transitions, 17646 flow [2024-06-21 18:50:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:50:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:50:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 18:50:59,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 18:50:59,711 INFO L175 Difference]: Start difference. First operand has 409 places, 905 transitions, 15663 flow. Second operand 6 states and 121 transitions. [2024-06-21 18:50:59,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 920 transitions, 17646 flow